# Y axis moves, when only X is commanded
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@dc42 Thanks for your reply. I just tried swapping the test and If I move the Y first, the X moves, just like the Y did. So that means you are right. Now I am not sure how to proceed.
When I was putting it together I used a 12" caliper and a extension rod that I filed to 6" to use to extend the only way I had of accurately measuring the distances. I measured distances between the X at the ends of the rails and the same on the Y. I believe that I am at .001" or less end to end. The belt that changes length on the outsides in the Y axis look very straight and measure the same width and the ends just before they change direction. (as accurately as I can). Used
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@msquared Thanks, I will check that out. Both motors sound good and when measuring the distance and repeating positions, it seems good.
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@fxxtoo Mine did not sound good, at all...in retrospect.
maybe some pictures of your belts / routing would help
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@msquared I will try tonight to take some pics and post them..Thanks
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@msquared Here is some pictures, I hope they help get to the bottom of this...
All comments are welcome...
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maybe the photos are misleading but it seems that the belts coming from the motors are not aligned with the Y axis rails.
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There is a good diagram that shows which belts must be parallel here http://forums.reprap.org/read.php?397,818906,818924#msg-818924.
Duet WiFi hardware designer and firmware engineer
Please do not ask me for Duet support via PM or email, use the forum
http://www.escher3d.com, https://miscsolutions.wordpress.com -
@dc42 Thanks. I modeled this printer after the last one the Digital Dentist built. I laid a straight edge on the belt and the motor side is out about .6 millimeter. I haven't checked the other side yet. I hope that will fix this. I love the Duet and the 7" Panel. I am glad that I went with this system.
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@whosrdaddy Thanks, It is off a bit on the motor side.
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I had to set this aside because of work, but am back at this. I found a post where a guy was having the same issues as I was. https://forum.duet3d.com/topic/3688/corexy-setup-problems-with-movement
I tried what he did and changed the steps per mm on one axis and my problem went away. That was after taking every thing a part and redoing it. The rails on the bearings are parallel within .001" end to end. The X is 90 degrees to the Y, the belts are even and the movements are correct. So I changed M92 X320 Y320 , trying different setting and with M92 X320 Y319, the movement of the axis are correct, no more Y movement when moving just the X and vice versa. So barring a difference in a pulley, could the board have a timing issue like the guy in the link posted as DC42 stated? Help I am just trying to get this printer up and running
