Low Speed for 3d Printing application
Muz94 wrote: Ouch, any workaround?
If you could get the slicer to output arcs rather than small line segments then that would help a lot.
(I have checked, and it does not look like Cura can do this. As STL is a polygon mesh this makes some sense, there are no arcs in the input data, so they would have to be created by inference)
Using a coarser STL mesh ought to help. Can you try that and see if it does actually help?
I am not suggesting this as a solution, soley to see if our conjectures seem consistent with reality.
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andypugh wrote:
Muz94 wrote: Ouch, any workaround?
If you could get the slicer to output arcs rather than small line segments then that would help a lot.
(I have checked, and it does not look like Cura can do this. As STL is a polygon mesh this makes some sense, there are no arcs in the input data, so they would have to be created by inference)
Using a coarser STL mesh ought to help. Can you try that and see if it does actually help?
I am not suggesting this as a solution, soley to see if our conjectures seem consistent with reality.
I can try, but I'm pretty sure that would help, unless cura breaks straight lines into small segments for no reason.
On the control side do you think that I could do something?
I don't think any slicer on the market at the moment could help with this problem
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github.com/LinuxCNC/linuxcnc/commit/b6ac...e096d87c0322bc5280db
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This sounds promising, is there any tutorial on how to compile linuxcnc? (especially from a branch).andypugh wrote: Some work was done, you could try compiling this experimental branch:
github.com/LinuxCNC/linuxcnc/commit/b6ac...e096d87c0322bc5280db
I have a limited experience with github, but i never compiled a huge public project like this.
Do you think that this would solve the issue? I see that it changes the way the speed is calculated, but it looks like nothing has been touched regarding the interpolation / lookahead ecc.
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If you can switch U and Z that might just work. Then XY and extruder Z is then used in almost every motion, and occasional move in height which is now U. Just an idea to see if things improve.
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Hakan wrote: If the motion takes place in XYZ (only) the good tp should be used.
If you can switch U and Z that might just work. Then XY and extruder Z is then used in almost every motion, and occasional move in height which is now U. Just an idea to see if things improve.
A cunning plan. I started thinking down that line, but gave up too early.
An input filter could easily swap U and Z in the code, then swap the wires in the machine.
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Wouldn't this mess up something?andypugh wrote:
Hakan wrote: If the motion takes place in XYZ (only) the good tp should be used.
If you can switch U and Z that might just work. Then XY and extruder Z is then used in almost every motion, and occasional move in height which is now U. Just an idea to see if things improve.
A cunning plan. I started thinking down that line, but gave up too early.
An input filter could easily swap U and Z in the code, then swap the wires in the machine.
I mean: this way the tp blends the movements in a XYU space, but the movement actually happens in XYZ, the U value isn't an actual coordinate in the 3d space.
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Muz94 wrote: Wouldn't this mess up something?
I mean: this way the tp blends the movements in a XYU space, but the movement actually happens in XYZ, the U value isn't an actual coordinate in the 3d space.
The TP is blending in XYZ, but Z is now the extruder. So the blending uses the new tp.
Once per layer there will be an old-blended U-axis (Z coordinate) move of the bed, but it doesn't matter if that is slow.
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