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end stop in Z1 AND Z2?
Posted: Mon Jun 17, 2019 1:48 pm
by axse
Hi all, I'm having severe problems with backslash. Everytime a print ends, the X axis slips on the Z right screw, the one where the extrusor is fixed, and the levelling became totally wrong.
I already tried to change the z nuts, but the problem is still there.
I'm wondering if it is possible to add a second Z stop on the Z2 axis and use it to redefine the orizzontality of the x axis.
and: is it possible to leave a current (20/30%) on the motors when the print is stopped?
Re: end stop in Z1 AND Z2?
Posted: Mon Jun 17, 2019 2:15 pm
by William
Hi, Can you tell me in detail how the leveling is wrong? Are you referring to adding an end stop to the z-axis on the right? I'm afraid not.
Re: end stop in Z1 AND Z2?
Posted: Mon Jun 17, 2019 4:34 pm
by axse
Hi William,
the problem occurs at the end of a print, when the motors turns off.
the left side of the x axis go down, slipping on the left screw. The antiback slash on the left screw does not work as intended and, when I start a second print, the right side of the X axis is far to high.
Re: end stop in Z1 AND Z2?
Posted: Mon Jun 17, 2019 5:08 pm
by William
Hi axse, Have you checked if the hot bed and extruder are loose?
Re: end stop in Z1 AND Z2?
Posted: Mon Jun 17, 2019 10:39 pm
by axse
Hot bed and extruder are OK. I'm sure that the x axis doesn't remain levelled, because I measure it. it becomes not perpendicular to Z axis.
Re: end stop in Z1 AND Z2?
Posted: Tue Jun 18, 2019 9:59 am
by William
Maybe it is caused by the motor being out of sync.
Re: end stop in Z1 AND Z2?
Posted: Tue Jun 18, 2019 11:31 pm
by axse
what do you mean with "motor out of sync?" and how could I solve it?
Re: end stop in Z1 AND Z2?
Posted: Wed Jun 19, 2019 10:44 am
by William
Have you tried to print a cube? Is the connection between the extrusion head and the belt normal or not? Is the hot bed moving smoothly and not issued? Different motor speeds may be caused by different drive plate voltages.
Re: end stop in Z1 AND Z2?
Posted: Wed Jun 26, 2019 6:10 am
by KinCatia
Your problem sound the same as mine was. The X beam was assembled with one end higher than the other so when I leveled the beam to the frame it was under load so gradually one side dropped relative to the other until they were 2 mm different. All that point I had no more problem except square sides weren't really square. I took the beam off and adjusted it and all seams well at the present. Did you find when leveling the beam turning the lead screw it felt tight? Mine did but doesn't now.
See
https://www.geeetech.com/forum/viewtopi ... 65&t=68801
Re: end stop in Z1 AND Z2?
Posted: Sun Jul 14, 2019 1:01 am
by KinCatia
If you try to re-level the beam does the Z lead screw get tighter as it get near being level. If yes then that why it gradually ends up with one side 2mm higher than the other. The beam was assembled with one side (in my case the right 2mm) higher than the other.