Help with X-axis skipping on large prints
I have been trying to print the parts to make a Lack Enclosure Ver 2 and I have had consistent problems with it doing one big x-slip per part. I have gone through 2 kg of Prusament PETG and nearly every part has had to be thrown into the garbage because it would either have a big x-axis slip in the beginning or more likely with about 30 mins left on a 9 hour print. I have tightened the heck out of the belt. I mean it is really tight, and I make sure it is really tight every time I start the print. Does anyone have any ideas? Is there any way I can tighten the belt even more or will that even help? I refuse to even try printing another part until I can find some solution because I really can not afford to be throwing away 2kg of Prusament PETG.
RE: Help with X-axis skipping on large prints
If the belt is as tight as you imply you could have overtightened it. It won't be causing the problems you describe but will reduce the life of various parts.
Is it happening at the same height every time? Can you post photos and maybe the 3mf file?
RE: Help with X-axis skipping on large prints
Suspect overheating of the X stepper.
Swap X to Y axis steppers. you may need to recalibrate.
See what results you get.
Are your steppers 0.9 pulse or 1.8 per step ?
I still think 0.9 pulse per step for any belt pulley driven devise is a bit of a sales kidology.
I run a Nema 23 1.8 pulse per step on a 60 mm pulley to pulley belt driving a 150 mm dia mill indexing head and I can be within
0.2 degree per 360 degree revolution.
Can anybody physically prove to me that a Nema 17 0.9 pulse has a place in the basically 3D throwing melted plastic at a heated bed.
Provided you get the calibration settings X Y Z E correct and prove repeatability then a 1.8 pulse will do the same.
Personally I think the smaller the pulse setting then the stepper will produce more heat i operation, again depending on the driver settings.
Are the Prusa steppers produced locally in Prague or ROC .I do not know of any EU nema 17 manufacturer.
RE:
@jp-guitars Here are some pics. No, not always at the same level. Also including a 3mf file.
@john-lindo I am not an engineer, so your talk of stepper motors is completely beyond me, but that you for replying!
RE: Help with X-axis skipping on large prints
https://www.printables.com/model/4291-prusa-printer-enclosure-v2-with-mmu2s-support-0125
Link to the 3mf files I have been trying to print.
RE: Help with X-axis skipping on large prints
From the photos it appears you could be maxing out on X travel if you are using a Mk 3 type machine,
as the heatbed is 215 x 215. I think by memory.
Try printing single parts with them rotated at 45 degrees, taking advantage of the full hypotenuse of a triangle.
Hope this helps.
RE: Help with X-axis skipping on large prints
I am using a Mk 4. And they are not slipping on the bed. It is just the X-axis and it only happens once per print. That is part of what is so frustrating. If it happened repeatedly during a 9 hour print that would make sense, but happening only once makes it a bit odd.
RE: Help with X-axis skipping on large prints
I've had a look and cannot see anything that would cause issues, sorry.
I would suggest you retension the belt to the correct tension though, overtight can cause problems as much as under. Have a look here: https://help.prusa3d.com/article/adjusting-belt-tension-mk4-s-mk3-9-s-mk3-5-s-mk3-s_112380