Belt slipping or stepper blocking?
I have a weird problem with my printer. I've had quite the rough ride with the upgrade to vCore 3.1 but managed to get it working. I've printed a bunch of files (PLA) and all seems well in paradise.
However - what happens now is the following. At random moments during a print (or sometimes even during the initial mesh) it sounds like one of the steppers just blocks and the X-Y messes up. It basically shifts a few steps to one side, resulting in failed prints (the center is no longer the center). Sometimes it happens during the mesh but sometimes it happens after printing a bunch of layers.
I've checked the grub screws, looked at belt tension, even double-checked the wiring - but I'm baffled. Anyone have an idea of what might be going on?
24 Replies
Check your x endstop and make sure it is functioning properly and not shorting out when getting moved around by the print head. Or you've got a bad wire (or connectors) to a stepper or binding in the belts. That's all I can think of.
Thanks, I'll check that out and report back 🙂
I've double checked all the cables but can't seem to find anything wrong. I did manage to film what happens: https://youtu.be/zDI6ZS3Ovfk
what current (power) setting for the motors are you using? also take a look at https://discord.com/channels/582187371529764864/1054265467591741511/1054265467591741511 and https://discord.com/channels/582187371529764864/844167067757182980/998324814509002944 Made a BIG difference in smoothness and noise
I actually did that yesterday, did wonders for the X/Y - but I still need to do the Z (which are the ones you are hearing most now I guess). I'm running the default RatOS ldo settings ([include config/steppers/ldo/42sth48-2504ac/2209/24v-1.1a-*.cfg])
Run current in that config file is set to run_current: 1.1
how tight are your belts?
They are tight, but not like a guitar string.
Can you upload your printer.cfg?
Yeah sure
have you also unplugged your x/y motors and then manually moved the toolhead around to see if you feel resistance in places?
you need to first unplug your motors, because otherwise if you move them too fast you can feed current back into the board and fry it
yeah, doesn't feel like any extra resistance. but I'll check it again.
just unplugged the steppers, and tried moving. It all feels quite equal for resistance - but when I move my carriage in X direction it also tries to move in Y; as if both are not turning at the same speed
Coming back to this comment - would your guess be that they are too tight?
also switched the Z-stepper wires now, its so much more silent
and another update - it seems to be doing it at the exact same place now, three times in a row
that happens when your X is skewed
as in not square?