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print fail after random amount of time
Posted: Mon Aug 25, 2014 8:06 am
by subsoniq
After printing PLA for about 20-30minutes on different prints, sometimes the whole print moves a few mm to the left/front.
Attached a few pictures. Is there something wrong with the carriages?
- moves to the left
Re: print fail after random amount of time
Posted: Mon Aug 25, 2014 8:28 am
by subsoniq
Can it be a stepper or two that skipped a step?
Re: print fail after random amount of time
Posted: Mon Aug 25, 2014 10:41 am
by DavidF
could be missing a step or a belt/pulley is slipping.
Try putting a witness mark on the pulley and center shaft of the stepper and power up the printer, then go G0 Z150 F3500. Grab the cheapskates and try sliding them up and down and see if you feel anything, and check your witness marks. You may also want to leave it powered up a bit and check the temp of the steppers I have seen on the forum that the Kysan steppers need to be run at a lower current due to them heating up (which could cause lost steps)
If you can check what steppers you have and the current settings in the configH and post it up here.
Re: print fail after random amount of time
Posted: Mon Aug 25, 2014 10:04 pm
by Holy1
Also check that cooling fan on the Rambo is working.
Problem solved. Tighten drivebelts
Posted: Wed Aug 27, 2014 8:10 am
by subsoniq
Hi, cooling fan works.
Not kysan motors. Wantai or something.
Took the advice and thightened up the drive belts, noticed that one of the belts had made a small amount of plastic falloff (plastic dust) from top of one of the drive belts.
so it was probably not horisontal at top mount.
After that everything works fine.
So, conclusion, to much slack on the drivebelts, made the machine skip steps sometimes.
Problem solved.
Now i have to get the PLA to cool off when creating overhangs. Next print will be the PLA cooling fan.