First results / Main motor overheating problems

[Thomas Braun]

Hi fellow extruders,

today I finally managed to get some first results.

I extruded ABS @ 243ï¿œC with the 1.75mm nozzle.
The filament looks very well for the first try.

After 10-15 minutes the main motor driving the extrusion screw stopped
working. The reason was it was *very* hot, so hot you could not touch
it.

Now I added another 12V fan, but this seems to be only a slight help.

Does anyone here have the same kind of problem? I guess I will try the
bigger nozzle tomorrow, until I have ordered some PLA pellets.

Thomas

[Herb Winters]

a couple things once you get the temp senor up to temp and you start the load should be fairly light on mine it gets harder after a couple minutes and I then adjusted the temp up a few degrees until It was back to the same loading.

you might need to raise the temp a few degrees.

[james s]

243c... for abs?

[Herb Winters]

@James are you saying you are using 243C and getting Good results or that you are having problems too?

[Thomas Braun]

Am 11.10.2013 21:17, schrieb james s:
> 243c... for abs?

Yes, I've used 243�C for ABS, that number is from one of Marks build videos.

If you have a better suggestion I'm happy to try that :)

Thomas

[james s]

sorry... was a question. What is the recomended temp for pla? Haven't got my extruder built yet.

[Herb Winters]

@James in the beginning of marks video (#5 I think) it said for PLA 174C was what they were using.
 

[Herb Winters]

Hey is anybody still having problems with the main extruder motor over heating?

I am working on a fix but have not heard much on this subject let me know if it is a real problem.

Thanks

[Herb Winters]

@Thomas, Hey how gooes your testing are you still having heat problems?

what did you do to fix the motor when it stopped the first time?

I hope to do some testing later this week or weekend.

[Staston Lombardi]

Hi , I'm having the same issue , motor is overheating , i think all the unit also as the upper part is very hot

I begin testing with 243 and even less temp 

it extrudes about 20 cm and then the motor is blocked , or move slowly

any suggestion to solve that problem ? 

Thx 

[Herb Winters]

once the temp gets up to 243 did you keep the extruder (Main motor) off for another 5-10 minutes before starting this is needed to get it to run smothly
the first 3 or 4 feet will come out too loose it is scrap but keep it running and it does stabilize I don't have trouble with the motor over heating but I have a cooling systems on mine that I designed
I plan on putting it up for everyone but I am having trouble finding the time right now. too many other fires to put out.

I have extruded about 30 meters and have built 2 parts out of 2 tries using my ultimaker the parts had nice finish the PLA I used was from Mark. Very happy with his material works great.

I am trying to fix the spooling as it does not work well this is way I have not made more. I currently need to baby-sit the machine while it is running which is not acceptable to me.

let me know if this helps I will be around most responding here at night EST time.

[Staston Lombardi]

Thx for help ;

Today i've buyed the  OATEY 31400 9 X 12 SOLDER FLAME PROTECTOR HEAT SHEILD NEW FREE 1ST

i'm waiting for it to arrive from Usa.

I hope you will have time soon  to put the files about the cooling system :) 

I was trying also to fix the spooling system before i got this problem on main motor overheating

Thx