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Printing issues ...
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I did not look at your equations, but your power is way off.
Given your stated conditions of a 0.2mm spot with a layer thickness of 0.2mm at a scan rate of 300mm/sec, the fused volume generated in 1 second is a long box with a square cross section 0.2mm on a side and 300mm long. The volume is 0.2mm*0.2mm*300mm = 0.012cc
The heat of fusion of Nylon 12 (sintering powder) is 215 kJ/kg (Page 648 Hand
by
kburgess
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Powder Printing and Selective Laser Sintering
I did find this in the configuration file
#define EXTRUDE_MAXLENGTH (X_MAX_LENGTH+Y_MAX_LENGTH) //prevent extrusion of very large distances.
But my X_MAX_LENGTH and Y_MAX_LENGTH are both greater that 100
however these constants are are defined later in the file that the line above, is that OK?
I also see the line
#define DEFAULT_MAX_FEEDRATE {500, 500, 5, 45} // (mm/sec)
by
kburgess
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Printing
Something very odd is happening with my extruder.
When I set Pronterface to extrude 100mm at 100mm/min the extruder runs for one minute and extrudes 100mm of input. But if i set Pronterface to extrude 100mm at 50mm/min my machine (Marlin based firmware) only extrudes 50mm? What's up with that? Is there some kind of timeout for a single extrusion command in Marlin? I don't see any configuration
by
kburgess
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Printing
Embarrased to say that my original calibration was incorrect, it was actually extruding 200mm instead of 100mm, not sure what happend but when I re-measured I discovered the error. No wonder 0.5 worked, but I'm sure I'll get better parts with the correct calibration. Thanks to everyone that spent any cycles on my question
Ken
by
kburgess
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Printing
Wow, great link, thanks!
But it makes me even more confused as to why my Extrusion multiplier must be set so small, it should be 1, but that puts out like WAY too much plastic...
Ken
by
kburgess
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Printing
First let me say I'm just getting started at this so please be kind if I ask some dumb questions.
In regards to the "Extrusion multiplier" I have been using a 3mm extruder with good results having calibrated the extruder by modifying the config file of the Marlin firmware until the length of input filament extruded is what is specified by the user variable in proterface. I extrude 100mm of filam
by
kburgess
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Printing
I'm not sure how important it is to know, that is how the information is usefull, but I just measured the extrudate from my 3mm extruder with a 0.5mm nozzle and found the diameter two ways:
First by direct measurement using calipers, the diameter varied from 0.5mm to 0.6mm with most readings near 0.57mm.
Then I measured the total output length from 100mm of input and got 90 inches. I did this
by
kburgess
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Printing
Thanks Everso, I figured there was some way to do it.
by
kburgess
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Slic3r
Can we get it to try? I just need to print one part that must be rotated first...
Thanks,
Ken
by
kburgess
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Slic3r
I was afraid of that, I'm always jsut one rev away from what I need.
I'm using Solidworks to create the files, one would think I could "rotate" the part there when I export it as an STL, but so far I don't see how to do that either. Looks like more to learn in any case.
Thanks for the quick answer.
Ken
by
kburgess
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Slic3r
I have a part I need to print, but it's oriented wrong, the bottom is on the side when it comes out of Slic3r, so there is a big overhang. If I can make the bottom be on the print bed it will print fine. How do I do this?
Thanks,
Ken
by
kburgess
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Slic3r