long time no mail... (My mail counter in the "Ultimaker" folder says
638 unread...) I really try to catch up on things in the next days and
hope to be back in the list more actively soon.
How you you like those crazy speeds? I mean at some point it doesn't
make sense to drive the machine faster and faster, but TinyG [1] looks
like a solid piece of hardware! Alden commented on his own post
regarding the speeds: "The advantage is that acceleration management
uses constant jerk equations instead of constant acceleration
equations. It's not that hard to make the machine go fast, it's a lot
harder to make it do this without shaking itself off the table."
Anybody with a bit more of electronic understanding than myself: Given
you implement the right math, is this also feasible with Marlin, or is
this only possibly when using the TinyG electronics? What do you
think?
Best greetings - I really hope everybody is doing fine over here!
Florian
thats why many people in the reprap community are working on ARM boards.
I estimate that everything will work like that using e.g. kliments 4pi or Arthurs smoothieboard.
However, also higher voltage would be a big factor, e.g. going to 36 Volts would improve acceleration.
greetings,
Bernhard, who hopefully will get his 4pi tomorrow.
> long time no mail... (My mail counter in the "Ultimaker" folder says
> 638 unread...) I really try to catch up on things in the next days and
> hope to be back in the list more actively soon.
> How you you like those crazy speeds? I mean at some point it doesn't
> make sense to drive the machine faster and faster, but TinyG [1] looks
> like a solid piece of hardware! Alden commented on his own post
> regarding the speeds: "The advantage is that acceleration management
> uses constant jerk equations instead of constant acceleration
> equations. It's not that hard to make the machine go fast, it's a lot
> harder to make it do this without shaking itself off the table."
> Anybody with a bit more of electronic understanding than myself: Given
> you implement the right math, is this also feasible with Marlin, or is
> this only possibly when using the TinyG electronics? What do you
> think?
> Best greetings - I really hope everybody is doing fine over here!
> Florian
we are hoping to get a single board to serve as a nexus board with
around 6 axis support to run any reprap, repstrap, CNC, laser cutter.
Alden and Synthetos have amazing code skills and are doing the hard
work. many of the rest of us are just helping with strategy/vision
reprap details stuff.
most of Marlin cannot be used since the motion control is an
alternative to GRBL.
it's a long term vision, but it seems suddenly possible.
I could imagine printing sugar that fast. to get fat filaments when
slow and tiny tiny capillary filaments when fast.
this system could one day move a robotic arm as the extruder... would
be nice bonus if your reprap could give you a high-five and mix drinks
for you.
jordan
On Oct 8, 2012, at 1:52 AM, Bernhard Kubicek <bernhard.kubi...@gmail.com> wrote:
> thats why many people in the reprap community are working on ARM boards.
> I estimate that everything will work like that using e.g. kliments 4pi or Arthurs smoothieboard.
> However, also higher voltage would be a big factor, e.g. going to 36 Volts would improve acceleration.
> greetings,
> Bernhard, who hopefully will get his 4pi tomorrow.
>> long time no mail... (My mail counter in the "Ultimaker" folder says
>> 638 unread...) I really try to catch up on things in the next days and
>> hope to be back in the list more actively soon.
>> How you you like those crazy speeds? I mean at some point it doesn't
>> make sense to drive the machine faster and faster, but TinyG [1] looks
>> like a solid piece of hardware! Alden commented on his own post
>> regarding the speeds: "The advantage is that acceleration management
>> uses constant jerk equations instead of constant acceleration
>> equations. It's not that hard to make the machine go fast, it's a lot
>> harder to make it do this without shaking itself off the table."
>> Anybody with a bit more of electronic understanding than myself: Given
>> you implement the right math, is this also feasible with Marlin, or is
>> this only possibly when using the TinyG electronics? What do you
>> think?
>> Best greetings - I really hope everybody is doing fine over here!
>> Florian
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> most of Marlin cannot be used since the motion control is an
> alternative to GRBL.
please elaborate? Apart from the need to overwork the actual step generation ISR, why can these parts not be used?
greetings,
Bernhard, now less active Marlin developer.
> we are hoping to get a single board to serve as a nexus board with
> around 6 axis support to run any reprap, repstrap, CNC, laser cutter.
> Alden and Synthetos have amazing code skills and are doing the hard
> work. many of the rest of us are just helping with strategy/vision
> reprap details stuff.
> most of Marlin cannot be used since the motion control is an
> alternative to GRBL.
Btw: Marlin is based on GRBL.
The hardware specs of the board are actually not that magic:
32Mhz Atmel 192A3, 8bit, USB support.
[In comparison Kliments 4pi:
SAM3U Atmel, Arm C3, 96Mhz, 32bit, USB support.
http://objects.reprap.org/wiki/Comparison_of_Electronics]
The higher 32mhz frequency of the cpu should not make such a tremendous difference over arduinomega boards, it should in best case double the step generation.
What is possible: that the stepper drivers are better, and that a different microstepping was used.
Also higher driving voltage could be a benefit.
Still I find this quite amazing, although I have to admit that it would not be useful to have this heavy accelerations, already at 90 mm/sec I see the vibrations due to the belts in the surface finish, although they are quite tight. However maybe reinforced belts would help for that.
Thanks for this link. I did not know this firmware.
I was am also looking at 3rd order acceleration. But it is difficult on the small atmegas.
I will look at this tonight and see if I can use it in my new hardware.
Op maandag 8 oktober 2012 04:07:40 UTC+2 schreef flouSH het volgende:
> long time no mail... (My mail counter in the "Ultimaker" folder says > 638 unread...) I really try to catch up on things in the next days and > hope to be back in the list more actively soon.
> How you you like those crazy speeds? I mean at some point it doesn't > make sense to drive the machine faster and faster, but TinyG [1] looks > like a solid piece of hardware! Alden commented on his own post > regarding the speeds: "The advantage is that acceleration management > uses constant jerk equations instead of constant acceleration > equations. It's not that hard to make the machine go fast, it's a lot > harder to make it do this without shaking itself off the table."
> Anybody with a bit more of electronic understanding than myself: Given > you implement the right math, is this also feasible with Marlin, or is > this only possibly when using the TinyG electronics? What do you > think?
> Best greetings - I really hope everybody is doing fine over here! > Florian
