Hi all, suddenly, my pretty well calibrated Orca turns to the left on each layer. First perimeter is left orientated to the skirt Infills is left orientated to the perimeter and stop with a gap on the right and overlap on the left perimeter. Next perimeter lays left orientated on the previous infill This was not the case before, so something must have developped a loose end or whatever. I tightened the Y-traction ribbon which looked loose No slack in the motor pulleys Any idea what causes this ? calibration to the left... rgrds Thomas https://reprap.org/forum/read.php?4,134044,134044#msg-134044 Tue, 17 Mar 2026 07:51:02 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?4,134044,136187#msg-136187 https://reprap.org/forum/read.php?4,134044,136187#msg-136187 I spray my stainless bars very lightly with a small olive oil cooking spray bottle every now and then and check movement with motors off every couple of days.
I have found the stepping of layers when the belts stretch and come loose.
Also had a problem with the x belt rubbing against the fender washer on my idler end and binding.]]> gregted Reprappers Tue, 05 Jun 2012 01:24:28 -0400 https://reprap.org/forum/read.php?4,134044,135954#msg-135954 https://reprap.org/forum/read.php?4,134044,135954#msg-135954
I greased the rods with 10W40 and after some moving by hand, all started to move better and better.
So the symptoms were tha prelude to a crash.

I will see if this was the eureka moment. if not, I will have to replace the lineair's I guess.

Thanks for thinking with me

Thomas]]> Replace Reprappers Sun, 03 Jun 2012 11:07:07 -0400 https://reprap.org/forum/read.php?4,134044,134358#msg-134358 https://reprap.org/forum/read.php?4,134044,134358#msg-134358
I'll give it a try]]> Replace Reprappers Thu, 24 May 2012 07:51:57 -0400 https://reprap.org/forum/read.php?4,134044,134348#msg-134348 https://reprap.org/forum/read.php?4,134044,134348#msg-134348 nophead Reprappers Thu, 24 May 2012 06:56:10 -0400 https://reprap.org/forum/read.php?4,134044,134339#msg-134339 https://reprap.org/forum/read.php?4,134044,134339#msg-134339
today I tried to print a cube and it started fine, however after 5 minutes the printer said "bang" and continued with an offset of 10 mm (to the right this time).

I noticed the carriage did not run smooth any more. When sliding over the x- axes, it almost blocked on numerous places.
I think the lineair bearings fail. I probably have to replace them :-(

Maybe grease the set for now... any clue what to grease nylon bearings with steel balls in them to run over stainless steel rod ?

Thomas]]> Replace Reprappers Thu, 24 May 2012 06:13:01 -0400 https://reprap.org/forum/read.php?4,134044,134101#msg-134101 https://reprap.org/forum/read.php?4,134044,134101#msg-134101 The slightly more complicated question is why?
Could a mechanical issue, something providing enough resistance to cause the axis to skip.
Could be the driver, try turning the gain pot on the driver down slightly, or up slightly if that doesn't work.
Could be electrical noise, check the wiring.]]> Polygonhell Reprappers Tue, 22 May 2012 19:43:31 -0400 https://reprap.org/forum/read.php?4,134044,134044#msg-134044 https://reprap.org/forum/read.php?4,134044,134044#msg-134044
suddenly, my pretty well calibrated Orca turns to the left on each layer.

First perimeter is left orientated to the skirt
Infills is left orientated to the perimeter and stop with a gap on the right and overlap on the left perimeter.
Next perimeter lays left orientated on the previous infill

This was not the case before, so something must have developped a loose end or whatever.

I tightened the Y-traction ribbon which looked loose
No slack in the motor pulleys

Any idea what causes this ?
calibration to the left...

rgrds Thomas]]> Replace Reprappers Tue, 22 May 2012 15:09:08 -0400