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PostPosted: Wed Jan 29, 2014 9:12 pm 
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Joined: Thu Oct 03, 2013 6:19 am
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Location: Namur, Belgium
A Z-motor holder is also very useful.

You can try to straighten up your rod (by hand putting it on a flat surface). You can also remove the lower nut from the ball bearing holder and tighten lightly the upper one (just to hold the ball bearing in place).

A flex coupler between the motor shaft and the rod helps a lot too.


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PostPosted: Thu Mar 16, 2017 8:25 am 
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Chek this please!
http://forum.velleman.eu/viewtopic.php?f=51&t=18811&p=85505#p85505
Search for "Background:"

Replace the Z-axis screw and the nut. It's easy and cheap solution and it fixes the problem.
No firmware update needed because the same size and pitch screw rod made of RST is VERY GOOD quality comparing the original one.

If the step motor is not in line with the screw and the motor is fitted only on printer frame side by two screws it is the reason for huge Z wobble

Good luck.


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