Extruder EStep Calibration
In an attempt to calibrate my extruder I have followed the guide at https://mattshub.com/2017/04/19/extruder-calibration/?fref=gc
At the default steps/mm the extruder was under extruding. I got 89mm in stead of 100. I used M92 E181.2 and verified with M503. I ran the test again. I am now getting over extrusion. It is feeding more than 120mm.
I ran the test multiple times at 161.3steps/mm and I consistently get 89mm.
This material is MatterHackers Pro Flex but I have done this calibration with their Pro PETG also with similar results.
Any ideas as to what would cause this large, unexpected swing in extrusion amount?
A separate but somewhat related issue. Each time I have tried this process I hear an odd noise for about 1 second when I first run the G1 E100 F100 command. I sounds almost like grinding gears, but I think it might be the extruder gear turning very fast for a very short duration. It does not feed 100mm through, just the short noise then return to idle. Subsequent commands work as expected. Its only on the first one.
Thanks
Re: Extruder EStep Calibration
Make sure you are starting the process by entering the M83, so the extruder goes to relative mode.
---
Gert
Re: Extruder EStep Calibration
Any ideas as to what would cause this large, unexpected swing in extrusion amount?
Make sure your extrusion tension screws are at 13mm.
It sounds like maybe you've got enough tension to push filament once it gets going, but not enough to get it started cleanly
Re: Extruder EStep Calibration
Any ideas as to what would cause this large, unexpected swing in extrusion amount?
Make sure your extrusion tension screws are at 13mm.
It sounds like maybe you've got enough tension to push filament once it gets going, but not enough to get it started cleanly
Thanks. I'll try that. They are at 14mm now.
Re: Extruder EStep Calibration
Hi guys,
I have the same problem. What do you mean with 13mm? Where do you measure this 13mm?
Thanks
Re: Extruder EStep Calibration
Hi guys,
I have the same problem. What do you mean with 13mm? Where do you measure this 13mm?
Thanks
its the length of the extruder idler springs.
check the mk2s assembly guide section 5 (Extruder Assembly) step 16
https://manual.prusa3d.com/Guide/5.+Extruder+Assembly/295?lang=en
Re: Extruder EStep Calibration
I was thinking we are talking about the MK3.