> I will get a good picture on monday...but again in regards to the
> mounting/assembling of the thermistor...the new hot end that I purchased
> (and which still melted the groovemount) was fully assembled from MakerGear
> by Rick......and therefore it should be as close to perfect as it could
> get......I did no messing around with that piece...Rick said that it should
> be ready to be plugged in and therefore thats what I did.......
> I agree with Rick's comment above: there has to be something wrong with
> the temperature management system.......I'm going to try to upload the
> firmware and go through the Getting started (posted in these forum) guide
> again to make sure it is not the firmware......
> On Sunday, May 20, 2012 5:50:45 PM UTC-4, NCBob wrote:
>> In line with what triffid hunter asked, a good quality picture of your
>> thermistor mounting will go a long way to determine that it's ok and not
>> the cause of the problems.
Good luck sorting this all out... I think if it were me I would do all the testing from here on out with the previously melted hot end parts. Cant hurt them much more now. You may even find you can clean the melted plastic off the threads better if you can heat it up again? Hope you get it fixed soon.
On Mon, May 21, 2012 at 8:03 AM, brw_racing <brw_rac...@hotmail.com> wrote:
> Good luck sorting this all out...
> I think if it were me I would do all the testing from here on out with the
> previously melted hot end parts. Cant hurt them much more now. You may even
> find you can clean the melted plastic off the threads better if you can
> heat it up again? Hope you get it fixed soon.
On Monday, May 21, 2012 10:06:43 AM UTC-4, Rick wrote:
> you can send the electronics to us and we can check them. which psu are > you using?
> On Mon, May 21, 2012 at 8:03 AM, brw_racing <brw_rac...@hotmail.com>wrote:
>> Good luck sorting this all out... >> I think if it were me I would do all the testing from here on out with >> the previously melted hot end parts. Cant hurt them much more now. You may >> even find you can clean the melted plastic off the threads better if you >> can heat it up again? Hope you get it fixed soon.
Interesting thread - I've been having a similar issue with my prusa. Hotend temp is stable until after I start a print. Then it rises without control. I'm working on some diagnostics and will post when I've sorted it out...
Possibly unrelated, I had this happen (uncontrolled temperature spikes) a
few times on my Cupcake when I was still running Gen3 electronics. I traced
it back to lag/interference on the USB cable. After I changed over to RAMPs
I no longer had this issue.
On May 25, 2012 10:24 AM, "Mike511" <michael.mill...@gmail.com> wrote:
> Interesting thread - I've been having a similar issue with my prusa.
> Hotend temp is stable until after I start a print. Then it rises without
> control. I'm working on some diagnostics and will post when I've sorted it
> out...
On Sat, May 26, 2012 at 12:01 AM, Mike511 <michael.mill...@gmail.com> wrote:
> Interesting thread - I've been having a similar issue with my prusa.
> Hotend temp is stable until after I start a print. Then it rises without
> control. I'm working on some diagnostics and will post when I've sorted it
> out...
this sounds like you have a really high temperature set in your gcode
The thing is my hot-end temp does not rise out of control at all.....all the melting of groovemount occurs between 150-180 C...I haven't worked on the printer this past week...wanted to just walk away from it for a while...will get back to it this week though....
My plan of attack:
- re-flash the sprinter firmware - use the old burnt up groovemounts and see if the temp that pronterface says is correct by measuring the actual temp (i need to find a temp gage that I can use in that space) -
On Friday, May 25, 2012 10:01:19 AM UTC-4, Mike511 wrote:
> Interesting thread - I've been having a similar issue with my prusa. > Hotend temp is stable until after I start a print. Then it rises without > control. I'm working on some diagnostics and will post when I've sorted it > out...
I think it's clear that there is an issue with your temp sensor. In
Sprinter configuration.h look for
#define THERMISTORHEATER X
The X should be: 1 is 100k thermistor
Next with the (12V power off) and the USB plugged in. Connect to the
Arduino with the Pronterface and check the temp reading. In Pronterface you
just click a button to issue the command M105. In my house the temp is
27.73C (81.9F and yes my thermostat is set to 82). Yours should be in the
same neighborhood.
It's possible that you have a poor connection to your termistor (is it the
same one or did you get a new one when you ordered the replacement
hotend?). If you are melting the PEEK <http://en.wikipedia.org/wiki/PEEK>(from
wikipedia: PEEK has a glass transition
temperature<http://en.wikipedia.org/wiki/Glass_transition_temperature>
at around 143 °C (289 °F) and melts around 343 °C (662 °F).)
FWIW,
Jay
On Mon, May 28, 2012 at 5:45 PM, iamthebest235 <iamthebest...@gmail.com>wrote:
> The thing is my hot-end temp does not rise out of control at all.....all
> the melting of groovemount occurs between 150-180 C...I haven't worked on
> the printer this past week...wanted to just walk away from it for a
> while...will get back to it this week though....
> My plan of attack:
> - re-flash the sprinter firmware
> - use the old burnt up groovemounts and see if the temp that pronterface
> says is correct by measuring the actual temp (i need to find a temp gage
> that I can use in that space)
> -
> On Friday, May 25, 2012 10:01:19 AM UTC-4, Mike511 wrote:
>> Interesting thread - I've been having a similar issue with my prusa.
>> Hotend temp is stable until after I start a print. Then it rises without
>> control. I'm working on some diagnostics and will post when I've sorted it
>> out...
On Thu, May 31, 2012 at 2:44 PM, Jay Couture <jay.cout...@gmail.com> wrote:
> It's possible that you have a poor connection to your termistor (is it the
> same one or did you get a new one when you ordered the replacement
> hotend?). If you are melting the PEEK <http://en.wikipedia.org/wiki/PEEK>(from
> wikipedia: PEEK has a glass transition temperature<http://en.wikipedia.org/wiki/Glass_transition_temperature>
> at around 143 °C (289 °F) and melts around 343 °C (662 °F).)
for some reason those numbers don't correlate well with reality.. the
makergear groovemount is perfectly fine at 235-240 but will drop the barrel
at 250+ so it actually behaves like it has a glass transition in the
240-250 zone.. not sure how that works, but there it is *shrug*
<triffid.hun...@gmail.com> wrote:
> On Thu, May 31, 2012 at 2:44 PM, Jay Couture <jay.cout...@gmail.com> wrote:
>> It's possible that you have a poor connection to your termistor (is it the
>> same one or did you get a new one when you ordered the replacement hotend?).
>> If you are melting the PEEK (from wikipedia: PEEK has a glass transition
>> temperature at around 143 °C (289 °F) and melts around 343 °C (662 °F).)
> for some reason those numbers don't correlate well with reality.. the
> makergear groovemount is perfectly fine at 235-240 but will drop the barrel
> at 250+ so it actually behaves like it has a glass transition in the 240-250
> zone.. not sure how that works, but there it is *shrug*
Or it may be that it's not pure peek and any reinforcement increases it's
temperature profile (For unreinforced PEEK, the HDT is 160"C (320"F). The
addition of 30% glass or carbon fiber reinforcement results in a dramatic
increase to 315"C (599"F). <http://www.sdplastics.com/peek.html>).
Not that it matters. Hundreds of these hotends have been sold and used so
we know the material is up to the task. And that two of them have done the
same thing for the same person/machine tells us, it's not the hotend.
On Thu, May 31, 2012 at 6:47 AM, John Yang <lj.johny...@gmail.com> wrote:
> most likely it is simply increased creep occuring at the lower temps
> below the glass transition temp
> On Thu, May 31, 2012 at 3:01 AM, Triffid Hunter
> <triffid.hun...@gmail.com> wrote:
> > On Thu, May 31, 2012 at 2:44 PM, Jay Couture <jay.cout...@gmail.com>
> wrote:
> >> It's possible that you have a poor connection to your termistor (is it
> the
> >> same one or did you get a new one when you ordered the replacement
> hotend?).
> >> If you are melting the PEEK (from wikipedia: PEEK has a glass transition
> >> temperature at around 143 °C (289 °F) and melts around 343 °C (662 °F).)
> > for some reason those numbers don't correlate well with reality.. the
> > makergear groovemount is perfectly fine at 235-240 but will drop the
> barrel
> > at 250+ so it actually behaves like it has a glass transition in the
> 240-250
> > zone.. not sure how that works, but there it is *shrug*
Great suggestions everyone thank you for taking notice into this problem of mine. Jay, I will perform the diagnostics you suggested and the thermistor is new on the new hot-end and was assembled by Rick so it should be perfect. As far as # define THERMISTORHEATER X the 'X' is 1 in my config file.
On Thursday, May 31, 2012 9:58:36 AM UTC-4, JayC wrote:
> Or it may be that it's not pure peek and any reinforcement increases it's > temperature profile (For unreinforced PEEK, the HDT is 160"C (320"F). The > addition of 30% glass or carbon fiber reinforcement results in a dramatic > increase to 315"C (599"F). <http://www.sdplastics.com/peek.html>).
> Not that it matters. Hundreds of these hotends have been sold and used so > we know the material is up to the task. And that two of them have done the > same thing for the same person/machine tells us, it's not the hotend.
> -Jay
> On Thu, May 31, 2012 at 6:47 AM, John Yang <lj.johny...@gmail.com> wrote:
>> most likely it is simply increased creep occuring at the lower temps
>> below the glass transition temp
>> On Thu, May 31, 2012 at 3:01 AM, Triffid Hunter
>> <triffid.hun...@gmail.com> wrote:
>> > On Thu, May 31, 2012 at 2:44 PM, Jay Couture <jay.cout...@gmail.com> >> wrote:
>> >> It's possible that you have a poor connection to your termistor (is it >> the
>> >> same one or did you get a new one when you ordered the replacement >> hotend?).
>> >> If you are melting the PEEK (from wikipedia: PEEK has a glass >> transition
>> >> temperature at around 143 °C (289 °F) and melts around 343 °C (662 >> °F).)
>> > for some reason those numbers don't correlate well with reality.. the
>> > makergear groovemount is perfectly fine at 235-240 but will drop the >> barrel
>> > at 250+ so it actually behaves like it has a glass transition in the >> 240-250
>> > zone.. not sure how that works, but there it is *shrug*
I uploaded the firmware again (will have to calibrate the machine again later).....and connected to the arduino via pronterface with the ATX power supply off...upon clicking the Check Temp button it shows 40-41 C.........that is way too much....and when i touch the nozzle end....it does not feel any warm......I'm currently trying to acquire some kind of temperature probe to check the measurements........will keep everyone updated.....
On Thursday, May 31, 2012 5:30:41 PM UTC-4, iamthebest235 wrote:
> Great suggestions everyone thank you for taking notice into this problem > of mine. Jay, I will perform the diagnostics you suggested and the > thermistor is new on the new hot-end and was assembled by Rick so it should > be perfect. As far as # define THERMISTORHEATER X the 'X' is 1 in my > config file.
> On Thursday, May 31, 2012 9:58:36 AM UTC-4, JayC wrote:
>> Or it may be that it's not pure peek and any reinforcement increases it's >> temperature profile (For unreinforced PEEK, the HDT is 160"C (320"F). >> The addition of 30% glass or carbon fiber reinforcement results in a >> dramatic increase to 315"C (599"F). <http://www.sdplastics.com/peek.html>
>> ).
>> Not that it matters. Hundreds of these hotends have been sold and used so >> we know the material is up to the task. And that two of them have done the >> same thing for the same person/machine tells us, it's not the hotend.
>> -Jay
>> On Thu, May 31, 2012 at 6:47 AM, John Yang <lj.johny...@gmail.com> wrote:
>>> most likely it is simply increased creep occuring at the lower temps
>>> below the glass transition temp
>>> On Thu, May 31, 2012 at 3:01 AM, Triffid Hunter
>>> <triffid.hun...@gmail.com> wrote:
>>> > On Thu, May 31, 2012 at 2:44 PM, Jay Couture <jay.cout...@gmail.com> >>> wrote:
>>> >> It's possible that you have a poor connection to your termistor (is >>> it the
>>> >> same one or did you get a new one when you ordered the replacement >>> hotend?).
>>> >> If you are melting the PEEK (from wikipedia: PEEK has a glass >>> transition
>>> >> temperature at around 143 °C (289 °F) and melts around 343 °C (662 >>> °F).)
>>> > for some reason those numbers don't correlate well with reality.. the
>>> > makergear groovemount is perfectly fine at 235-240 but will drop the >>> barrel
>>> > at 250+ so it actually behaves like it has a glass transition in the >>> 240-250
>>> > zone.. not sure how that works, but there it is *shrug*
Ok I'm really confused now...as I said in the previous post that with everything off and the nozzle sitting @ room temp for a long time reads 40-41 C in pronterface but 22-23 on my temp probe (room temp)....but when i turn on the heater for the extruder and set to the default for abs in pronterface (230).....both the temp. probe and pronterface temp are pretty much the same...3-5 degree difference.......probably because of the temp. probe its not the greatest but the best i could get my hands on for now..........
Need help big time now.......I have one more new groovemount and I don't want to mess that up...but I can't really test cuz the old groovemounts are messed up and can't be threaded to the brass end of the nozzle.....what should I do......I've a deadline for this to be printing by Friday (i don't need good prints......i just need to show that this machine works and prints by friday)........
Any and all help is welcomed and greatly appreciated!
On Tuesday, May 15, 2012 4:11:17 PM UTC-4, iamthebest235 wrote:
> So I went for my first print on my prusa mendel, got the hot end heated up > to right temp, loaded the ABS plastic in the plastruder, hit the extrude > button on pronterface till the plastic squeezed out of the nozzle. Had to > stop there and then came back. Heated up the hot end upto temp again, and > when hit extrude to get the plastic flowing, the brass assembly of the > nozzle shifted and saw that the groovemount had separated. After cooling > down the hot end I looked at the hot end assembly and saw that the > groovemount had melted and would not thread back in on the brass assembly.
> I ordered a new hot end from Rick (great with the shipping btw, I ordered > it in the morning and picked it up in the evening...thanx) and he said that > it's all assembled and ready to be plugged in. I trust his assembly more > than mine (and it actually looked 50 times better than what I had done with > my assembly). I plugged it in and again same thing happened. The > groovemount (mind that this is a new one) melted when trying to extrude > plastic. How is this possible and how do I fix this? I don't want to > spend $50 everytime I want to try to print something.
since I assume you have a barrel heater nozzle thermistor setup from
the burnt out failure from before, I'd just connect the broken setup
to your machine, but have it sit on a metal or other heat resistant
surface. then run the heater to a set point, and use an external
thermometer to check the readings from the thermistor. So basically
test out the termistor readings on a bare barrel setup so you don't
mess up another insulator if you're worried.
On Tue, Jun 5, 2012 at 11:43 AM, iamthebest235 <iamthebest...@gmail.com> wrote:
> Ok I'm really confused now...as I said in the previous post that with
> everything off and the nozzle sitting @ room temp for a long time reads
> 40-41 C in pronterface but 22-23 on my temp probe (room temp)....but when i
> turn on the heater for the extruder and set to the default for abs in
> pronterface (230).....both the temp. probe and pronterface temp are pretty
> much the same...3-5 degree difference.......probably because of the temp.
> probe its not the greatest but the best i could get my hands on for
> now..........
> Need help big time now.......I have one more new groovemount and I don't
> want to mess that up...but I can't really test cuz the old groovemounts are
> messed up and can't be threaded to the brass end of the nozzle.....what
> should I do......I've a deadline for this to be printing by Friday (i don't
> need good prints......i just need to show that this machine works and prints
> by friday)........
> Any and all help is welcomed and greatly appreciated!
> On Tuesday, May 15, 2012 4:11:17 PM UTC-4, iamthebest235 wrote:
>> So I went for my first print on my prusa mendel, got the hot end heated up
>> to right temp, loaded the ABS plastic in the plastruder, hit the extrude
>> button on pronterface till the plastic squeezed out of the nozzle. Had to
>> stop there and then came back. Heated up the hot end upto temp again, and
>> when hit extrude to get the plastic flowing, the brass assembly of the
>> nozzle shifted and saw that the groovemount had separated. After cooling
>> down the hot end I looked at the hot end assembly and saw that the
>> groovemount had melted and would not thread back in on the brass assembly.
>> I ordered a new hot end from Rick (great with the shipping btw, I ordered
>> it in the morning and picked it up in the evening...thanx) and he said that
>> it's all assembled and ready to be plugged in. I trust his assembly more
>> than mine (and it actually looked 50 times better than what I had done with
>> my assembly). I plugged it in and again same thing happened. The
>> groovemount (mind that this is a new one) melted when trying to extrude
>> plastic. How is this possible and how do I fix this? I don't want to spend
>> $50 everytime I want to try to print something.
LJ: I did exactly the same to see if the thermistor reading was correct and it was pretty accurate after I turned on the heater (withing 3-5 deg C of the temp. probe reading). With the PSU off and nozzle end cooled to room temp. it read 40-41 deg C (which I thought was odd) but when the heater is on the temp rise and fall is pretty decent to what I observed on the thermometer.
Joshua: I will join the IRC channel soon in a couple hours. But I didnt heat the ABS on pronterface to the default value. In my initial runs (when everything failed) I changed my defaults temp on pronterface to 200C; fed the abs @ around 130C; and it started extruding at arond 180C; which is when the groovemount melted too.
On Tuesday, June 5, 2012 12:30:40 PM UTC-4, LJ wrote:
> since I assume you have a barrel heater nozzle thermistor setup from > the burnt out failure from before, I'd just connect the broken setup > to your machine, but have it sit on a metal or other heat resistant > surface. then run the heater to a set point, and use an external > thermometer to check the readings from the thermistor. So basically > test out the termistor readings on a bare barrel setup so you don't > mess up another insulator if you're worried.
> On Tue, Jun 5, 2012 at 11:43 AM, iamthebest235 <iamthebest...@gmail.com> > wrote: > > Ok I'm really confused now...as I said in the previous post that with > > everything off and the nozzle sitting @ room temp for a long time reads > > 40-41 C in pronterface but 22-23 on my temp probe (room temp)....but > when i > > turn on the heater for the extruder and set to the default for abs in > > pronterface (230).....both the temp. probe and pronterface temp are > pretty > > much the same...3-5 degree difference.......probably because of the > temp. > > probe its not the greatest but the best i could get my hands on for > > now..........
> > Need help big time now.......I have one more new groovemount and I don't > > want to mess that up...but I can't really test cuz the old groovemounts > are > > messed up and can't be threaded to the brass end of the nozzle.....what > > should I do......I've a deadline for this to be printing by Friday (i > don't > > need good prints......i just need to show that this machine works and > prints > > by friday)........
> > Any and all help is welcomed and greatly appreciated!
> > On Tuesday, May 15, 2012 4:11:17 PM UTC-4, iamthebest235 wrote:
> >> So I went for my first print on my prusa mendel, got the hot end heated > up > >> to right temp, loaded the ABS plastic in the plastruder, hit the > extrude > >> button on pronterface till the plastic squeezed out of the nozzle. Had > to > >> stop there and then came back. Heated up the hot end upto temp again, > and > >> when hit extrude to get the plastic flowing, the brass assembly of the > >> nozzle shifted and saw that the groovemount had separated. After > cooling > >> down the hot end I looked at the hot end assembly and saw that the > >> groovemount had melted and would not thread back in on the brass > assembly.
> >> I ordered a new hot end from Rick (great with the shipping btw, I > ordered > >> it in the morning and picked it up in the evening...thanx) and he said > that > >> it's all assembled and ready to be plugged in. I trust his assembly > more > >> than mine (and it actually looked 50 times better than what I had done > with > >> my assembly). I plugged it in and again same thing happened. The > >> groovemount (mind that this is a new one) melted when trying to extrude > >> plastic. How is this possible and how do I fix this? I don't want to > spend > >> $50 everytime I want to try to print something.
Ok so I think I've found out the problem I just don't know how to solve...
Today I tried to heat up the nozzle (without the groovemount attached) to 190 C. In pronterface it took about 13 mins to get to 156 C and then dropped to 149 C. It stayed constant at 149 C for a while. So I got my temp probe, and touched it to the end of the nozzle (near the thermistor) to get the reading. The temp probe read 205 C and was climbing.
This tells me that the hot end temp keeps rising but pronterface (software) stalls at 150 C.
(1) I would be inclined to say that its the thermistor that's not installed/working properly, but again this is the new hot-end assembled by Rick.
(2) Next, maybe the sprinter setting is not correct, but it is: Thermistor is defined as # 1 (as it should be)
(3) When I tested to ohms on the room temp thermistor connections (they read: 98.7 kohms), keep in mind at that time the hot end temp in software read 40 C.
What do you guys think are the possible solutions/culprits for this problem?
On Tuesday, June 5, 2012 1:02:19 PM UTC-4, iamthebest235 wrote:
> Thanks for the suggestions.
> LJ: I did exactly the same to see if the thermistor reading was correct > and it was pretty accurate after I turned on the heater (withing 3-5 deg C > of the temp. probe reading). With the PSU off and nozzle end cooled to > room temp. it read 40-41 deg C (which I thought was odd) but when the > heater is on the temp rise and fall is pretty decent to what I observed on > the thermometer.
> Joshua: I will join the IRC channel soon in a couple hours. But I didnt > heat the ABS on pronterface to the default value. In my initial runs (when > everything failed) I changed my defaults temp on pronterface to 200C; fed > the abs @ around 130C; and it started extruding at arond 180C; which is > when the groovemount melted too.
> On Tuesday, June 5, 2012 12:30:40 PM UTC-4, LJ wrote:
>> since I assume you have a barrel heater nozzle thermistor setup from >> the burnt out failure from before, I'd just connect the broken setup >> to your machine, but have it sit on a metal or other heat resistant >> surface. then run the heater to a set point, and use an external >> thermometer to check the readings from the thermistor. So basically >> test out the termistor readings on a bare barrel setup so you don't >> mess up another insulator if you're worried.
>> On Tue, Jun 5, 2012 at 11:43 AM, iamthebest235 <iamthebest...@gmail.com> >> wrote: >> > Ok I'm really confused now...as I said in the previous post that with >> > everything off and the nozzle sitting @ room temp for a long time reads >> > 40-41 C in pronterface but 22-23 on my temp probe (room temp)....but >> when i >> > turn on the heater for the extruder and set to the default for abs in >> > pronterface (230).....both the temp. probe and pronterface temp are >> pretty >> > much the same...3-5 degree difference.......probably because of the >> temp. >> > probe its not the greatest but the best i could get my hands on for >> > now..........
>> > Need help big time now.......I have one more new groovemount and I >> don't >> > want to mess that up...but I can't really test cuz the old groovemounts >> are >> > messed up and can't be threaded to the brass end of the nozzle.....what >> > should I do......I've a deadline for this to be printing by Friday (i >> don't >> > need good prints......i just need to show that this machine works and >> prints >> > by friday)........
>> > Any and all help is welcomed and greatly appreciated!
>> > On Tuesday, May 15, 2012 4:11:17 PM UTC-4, iamthebest235 wrote:
>> >> So I went for my first print on my prusa mendel, got the hot end >> heated up >> >> to right temp, loaded the ABS plastic in the plastruder, hit the >> extrude >> >> button on pronterface till the plastic squeezed out of the nozzle. >> Had to >> >> stop there and then came back. Heated up the hot end upto temp again, >> and >> >> when hit extrude to get the plastic flowing, the brass assembly of the >> >> nozzle shifted and saw that the groovemount had separated. After >> cooling >> >> down the hot end I looked at the hot end assembly and saw that the >> >> groovemount had melted and would not thread back in on the brass >> assembly.
>> >> I ordered a new hot end from Rick (great with the shipping btw, I >> ordered >> >> it in the morning and picked it up in the evening...thanx) and he said >> that >> >> it's all assembled and ready to be plugged in. I trust his assembly >> more >> >> than mine (and it actually looked 50 times better than what I had done >> with >> >> my assembly). I plugged it in and again same thing happened. The >> >> groovemount (mind that this is a new one) melted when trying to >> extrude >> >> plastic. How is this possible and how do I fix this? I don't want to >> spend >> >> $50 everytime I want to try to print something.
> Ok so I think I've found out the problem I just don't know how to solve...
> Today I tried to heat up the nozzle (without the groovemount attached) to
> 190 C. In pronterface it took about 13 mins to get to 156 C and then
> dropped to 149 C. It stayed constant at 149 C for a while. So I got my
> temp probe, and touched it to the end of the nozzle (near the thermistor)
> to get the reading. The temp probe read 205 C and was climbing.
> This tells me that the hot end temp keeps rising but pronterface
> (software) stalls at 150 C.
> (1) I would be inclined to say that its the thermistor that's not
> installed/working properly, but again this is the new hot-end assembled by
> Rick.
> (2) Next, maybe the sprinter setting is not correct, but it is: Thermistor
> is defined as # 1 (as it should be)
> (3) When I tested to ohms on the room temp thermistor connections (they
> read: 98.7 kohms), keep in mind at that time the hot end temp in software
> read 40 C.
> What do you guys think are the possible solutions/culprits for this
> problem?
> Once again, thanks for all your help.
> On Tuesday, June 5, 2012 1:02:19 PM UTC-4, iamthebest235 wrote:
>> Thanks for the suggestions.
>> LJ: I did exactly the same to see if the thermistor reading was correct
>> and it was pretty accurate after I turned on the heater (withing 3-5 deg C
>> of the temp. probe reading). With the PSU off and nozzle end cooled to
>> room temp. it read 40-41 deg C (which I thought was odd) but when the
>> heater is on the temp rise and fall is pretty decent to what I observed on
>> the thermometer.
>> Joshua: I will join the IRC channel soon in a couple hours. But I didnt
>> heat the ABS on pronterface to the default value. In my initial runs (when
>> everything failed) I changed my defaults temp on pronterface to 200C; fed
>> the abs @ around 130C; and it started extruding at arond 180C; which is
>> when the groovemount melted too.
>> On Tuesday, June 5, 2012 12:30:40 PM UTC-4, LJ wrote:
>>> since I assume you have a barrel heater nozzle thermistor setup from
>>> the burnt out failure from before, I'd just connect the broken setup
>>> to your machine, but have it sit on a metal or other heat resistant
>>> surface. then run the heater to a set point, and use an external
>>> thermometer to check the readings from the thermistor. So basically
>>> test out the termistor readings on a bare barrel setup so you don't
>>> mess up another insulator if you're worried.
>>> On Tue, Jun 5, 2012 at 11:43 AM, iamthebest235 <iamthebest...@gmail.com>
>>> wrote:
>>> > Ok I'm really confused now...as I said in the previous post that with
>>> > everything off and the nozzle sitting @ room temp for a long time
>>> reads
>>> > 40-41 C in pronterface but 22-23 on my temp probe (room temp)....but
>>> when i
>>> > turn on the heater for the extruder and set to the default for abs in
>>> > pronterface (230).....both the temp. probe and pronterface temp are
>>> pretty
>>> > much the same...3-5 degree difference.......probably because of the
>>> temp.
>>> > probe its not the greatest but the best i could get my hands on for
>>> > now..........
>>> > Need help big time now.......I have one more new groovemount and I
>>> don't
>>> > want to mess that up...but I can't really test cuz the old
>>> groovemounts are
>>> > messed up and can't be threaded to the brass end of the
>>> nozzle.....what
>>> > should I do......I've a deadline for this to be printing by Friday (i
>>> don't
>>> > need good prints......i just need to show that this machine works and
>>> prints
>>> > by friday)........
>>> > Any and all help is welcomed and greatly appreciated!
>>> > On Tuesday, May 15, 2012 4:11:17 PM UTC-4, iamthebest235 wrote:
>>> >> So I went for my first print on my prusa mendel, got the hot end
>>> heated up
>>> >> to right temp, loaded the ABS plastic in the plastruder, hit the
>>> extrude
>>> >> button on pronterface till the plastic squeezed out of the nozzle.
>>> Had to
>>> >> stop there and then came back. Heated up the hot end upto temp
>>> again, and
>>> >> when hit extrude to get the plastic flowing, the brass assembly of
>>> the
>>> >> nozzle shifted and saw that the groovemount had separated. After
>>> cooling
>>> >> down the hot end I looked at the hot end assembly and saw that the
>>> >> groovemount had melted and would not thread back in on the brass
>>> assembly.
>>> >> I ordered a new hot end from Rick (great with the shipping btw, I
>>> ordered
>>> >> it in the morning and picked it up in the evening...thanx) and he
>>> said that
>>> >> it's all assembled and ready to be plugged in. I trust his assembly
>>> more
>>> >> than mine (and it actually looked 50 times better than what I had
>>> done with
>>> >> my assembly). I plugged it in and again same thing happened. The
>>> >> groovemount (mind that this is a new one) melted when trying to
>>> extrude
>>> >> plastic. How is this possible and how do I fix this? I don't want
>>> to spend
>>> >> $50 everytime I want to try to print something.
On Wednesday, June 6, 2012 10:27:18 AM UTC-4, Rick wrote:
> do you want to send the hot end and electronics to us?
> On Wed, Jun 6, 2012 at 10:24 AM, iamthebest235 <iamthebest...@gmail.com>wrote:
>> Ok so I think I've found out the problem I just don't know how to solve...
>> Today I tried to heat up the nozzle (without the groovemount attached) to >> 190 C. In pronterface it took about 13 mins to get to 156 C and then >> dropped to 149 C. It stayed constant at 149 C for a while. So I got my >> temp probe, and touched it to the end of the nozzle (near the thermistor) >> to get the reading. The temp probe read 205 C and was climbing.
>> This tells me that the hot end temp keeps rising but pronterface >> (software) stalls at 150 C.
>> (1) I would be inclined to say that its the thermistor that's not >> installed/working properly, but again this is the new hot-end assembled by >> Rick.
>> (2) Next, maybe the sprinter setting is not correct, but it is: >> Thermistor is defined as # 1 (as it should be)
>> (3) When I tested to ohms on the room temp thermistor connections (they >> read: 98.7 kohms), keep in mind at that time the hot end temp in software >> read 40 C.
>> What do you guys think are the possible solutions/culprits for this >> problem?
>> Once again, thanks for all your help.
>> On Tuesday, June 5, 2012 1:02:19 PM UTC-4, iamthebest235 wrote:
>>> Thanks for the suggestions.
>>> LJ: I did exactly the same to see if the thermistor reading was correct >>> and it was pretty accurate after I turned on the heater (withing 3-5 deg C >>> of the temp. probe reading). With the PSU off and nozzle end cooled to >>> room temp. it read 40-41 deg C (which I thought was odd) but when the >>> heater is on the temp rise and fall is pretty decent to what I observed on >>> the thermometer.
>>> Joshua: I will join the IRC channel soon in a couple hours. But I >>> didnt heat the ABS on pronterface to the default value. In my initial runs >>> (when everything failed) I changed my defaults temp on pronterface to 200C; >>> fed the abs @ around 130C; and it started extruding at arond 180C; which is >>> when the groovemount melted too.
>>> On Tuesday, June 5, 2012 12:30:40 PM UTC-4, LJ wrote:
>>>> since I assume you have a barrel heater nozzle thermistor setup from >>>> the burnt out failure from before, I'd just connect the broken setup >>>> to your machine, but have it sit on a metal or other heat resistant >>>> surface. then run the heater to a set point, and use an external >>>> thermometer to check the readings from the thermistor. So basically >>>> test out the termistor readings on a bare barrel setup so you don't >>>> mess up another insulator if you're worried.
>>>> On Tue, Jun 5, 2012 at 11:43 AM, iamthebest235 <iamthebest...@gmail.com> >>>> wrote: >>>> > Ok I'm really confused now...as I said in the previous post that with >>>> > everything off and the nozzle sitting @ room temp for a long time >>>> reads >>>> > 40-41 C in pronterface but 22-23 on my temp probe (room temp)....but >>>> when i >>>> > turn on the heater for the extruder and set to the default for abs in >>>> > pronterface (230).....both the temp. probe and pronterface temp are >>>> pretty >>>> > much the same...3-5 degree difference.......probably because of the >>>> temp. >>>> > probe its not the greatest but the best i could get my hands on for >>>> > now..........
>>>> > Need help big time now.......I have one more new groovemount and I >>>> don't >>>> > want to mess that up...but I can't really test cuz the old >>>> groovemounts are >>>> > messed up and can't be threaded to the brass end of the >>>> nozzle.....what >>>> > should I do......I've a deadline for this to be printing by Friday (i >>>> don't >>>> > need good prints......i just need to show that this machine works and >>>> prints >>>> > by friday)........
>>>> > Any and all help is welcomed and greatly appreciated!
>>>> > On Tuesday, May 15, 2012 4:11:17 PM UTC-4, iamthebest235 wrote:
>>>> >> So I went for my first print on my prusa mendel, got the hot end >>>> heated up >>>> >> to right temp, loaded the ABS plastic in the plastruder, hit the >>>> extrude >>>> >> button on pronterface till the plastic squeezed out of the nozzle. >>>> Had to >>>> >> stop there and then came back. Heated up the hot end upto temp >>>> again, and >>>> >> when hit extrude to get the plastic flowing, the brass assembly of >>>> the >>>> >> nozzle shifted and saw that the groovemount had separated. After >>>> cooling >>>> >> down the hot end I looked at the hot end assembly and saw that the >>>> >> groovemount had melted and would not thread back in on the brass >>>> assembly.
>>>> >> I ordered a new hot end from Rick (great with the shipping btw, I >>>> ordered >>>> >> it in the morning and picked it up in the evening...thanx) and he >>>> said that >>>> >> it's all assembled and ready to be plugged in. I trust his assembly >>>> more >>>> >> than mine (and it actually looked 50 times better than what I had >>>> done with >>>> >> my assembly). I plugged it in and again same thing happened. The >>>> >> groovemount (mind that this is a new one) melted when trying to >>>> extrude >>>> >> plastic. How is this possible and how do I fix this? I don't want >>>> to spend >>>> >> $50 everytime I want to try to print something.
The common denominator is your controller. Your RAMPS to be more exact. If
you ahve a v1.3 or higher there are multiple temperature pins. T0 to your
extruder, T1 to your HPB, and T2 to a second extruder if you have one. Have
you posted a close up photo of your RAMPS before? (
http://reprap.org/wiki/File:Rampswire14.svg )
Only issue, I don't see the second termp probe T2 assigned to an analog
input in the pins.h file.
-Jay
On Wed, Jun 6, 2012 at 9:24 AM, iamthebest235 <iamthebest...@gmail.com>wrote:
> Ok so I think I've found out the problem I just don't know how to solve...
> Today I tried to heat up the nozzle (without the groovemount attached) to
> 190 C. In pronterface it took about 13 mins to get to 156 C and then
> dropped to 149 C. It stayed constant at 149 C for a while. So I got my
> temp probe, and touched it to the end of the nozzle (near the thermistor)
> to get the reading. The temp probe read 205 C and was climbing.
> This tells me that the hot end temp keeps rising but pronterface
> (software) stalls at 150 C.
> (1) I would be inclined to say that its the thermistor that's not
> installed/working properly, but again this is the new hot-end assembled by
> Rick.
> (2) Next, maybe the sprinter setting is not correct, but it is: Thermistor
> is defined as # 1 (as it should be)
> (3) When I tested to ohms on the room temp thermistor connections (they
> read: 98.7 kohms), keep in mind at that time the hot end temp in software
> read 40 C.
> What do you guys think are the possible solutions/culprits for this
> problem?
On Wed, Jun 6, 2012 at 10:38 AM, Jay Couture <jay.cout...@gmail.com> wrote:
> The common denominator is your controller. Your RAMPS to be more exact. If
> you ahve a v1.3 or higher there are multiple temperature pins. T0 to your
> extruder, T1 to your HPB, and T2 to a second extruder if you have one. Have
> you posted a close up photo of your RAMPS before? (
> http://reprap.org/wiki/File:Rampswire14.svg )
> Only issue, I don't see the second termp probe T2 assigned to an analog
> input in the pins.h file.
> -Jay
> On Wed, Jun 6, 2012 at 9:24 AM, iamthebest235 <iamthebest...@gmail.com>wrote:
>> Ok so I think I've found out the problem I just don't know how to solve...
>> Today I tried to heat up the nozzle (without the groovemount attached) to
>> 190 C. In pronterface it took about 13 mins to get to 156 C and then
>> dropped to 149 C. It stayed constant at 149 C for a while. So I got my
>> temp probe, and touched it to the end of the nozzle (near the thermistor)
>> to get the reading. The temp probe read 205 C and was climbing.
>> This tells me that the hot end temp keeps rising but pronterface
>> (software) stalls at 150 C.
>> (1) I would be inclined to say that its the thermistor that's not
>> installed/working properly, but again this is the new hot-end assembled by
>> Rick.
>> (2) Next, maybe the sprinter setting is not correct, but it is:
>> Thermistor is defined as # 1 (as it should be)
>> (3) When I tested to ohms on the room temp thermistor connections (they
>> read: 98.7 kohms), keep in mind at that time the hot end temp in software
>> read 40 C.
>> What do you guys think are the possible solutions/culprits for this
>> problem?
I don't think I've posted a pic of the Ramps but I've a fully assembled Ramps 1.4 board from makergear. I had a v1.2 before that I assembled and had some bad soldering job so I just got a new one pre-assembled from Makergear to play it safe.
It could also be the PSU. I've attached pics of my PSU setup (I will attach it to this post too) if you could please check that and let me know if its correct or not. It's the Eagle PSU.
On Wednesday, June 6, 2012 10:38:04 AM UTC-4, JayC wrote:
> The common denominator is your controller. Your RAMPS to be more exact. If > you ahve a v1.3 or higher there are multiple temperature pins. T0 to your > extruder, T1 to your HPB, and T2 to a second extruder if you have one. Have > you posted a close up photo of your RAMPS before? ( > http://reprap.org/wiki/File:Rampswire14.svg )
> Only issue, I don't see the second termp probe T2 assigned to an analog > input in the pins.h file.
> -Jay
> On Wed, Jun 6, 2012 at 9:24 AM, iamthebest235 <iamthebest...@gmail.com>wrote:
>> Ok so I think I've found out the problem I just don't know how to solve...
>> Today I tried to heat up the nozzle (without the groovemount attached) to >> 190 C. In pronterface it took about 13 mins to get to 156 C and then >> dropped to 149 C. It stayed constant at 149 C for a while. So I got my >> temp probe, and touched it to the end of the nozzle (near the thermistor) >> to get the reading. The temp probe read 205 C and was climbing.
>> This tells me that the hot end temp keeps rising but pronterface >> (software) stalls at 150 C.
>> (1) I would be inclined to say that its the thermistor that's not >> installed/working properly, but again this is the new hot-end assembled by >> Rick.
>> (2) Next, maybe the sprinter setting is not correct, but it is: >> Thermistor is defined as # 1 (as it should be)
>> (3) When I tested to ohms on the room temp thermistor connections (they >> read: 98.7 kohms), keep in mind at that time the hot end temp in software >> read 40 C.
>> What do you guys think are the possible solutions/culprits for this >> problem?
