x and y calibration issue On my SmartrapCore Alu I am getting 20.07mm along one side and 19.50mm on the other side of a 20mm cube. I have tried altering the belt tension on one side then tried the other way around but the difference between x and y stays the same. Should I be looking to change my x steps/mm relative to y? https://reprap.org/forum/read.php?397,650827,650827#msg-650827 Sun, 12 Jul 2026 04:52:55 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?397,650827,651907#msg-651907 Re: x and y calibration issue https://reprap.org/forum/read.php?397,650827,651907#msg-651907
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Holy1
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DjDemonD
So I tried that and predictably got a parallelogram not a cube.

Back to the belt tension I suppose. The odd thing is it was printing both sides reasonably close (within 0.05mm) before I changed to from 20t to 16t pulleys to see if it improved the resolution.

Did changing the pulleys affect the resolution ?

Hard to tell, since if I am honest I was not unhappy with it before - but at first glance it seemed like such a simple mod, then why not try it.

I think the asymmetry was related to one of the y-smooth rods being 2mm higher at one end due to the way they are mounted, and the fact that I've revised that part to try to minimise resonance (it is a motor mount and smooth rod holder combined), This resulted in the x axis being tilted and it was approx. 2mm further away from the frame on the right than the left. I have fixed this now so the digital dentist got it right it was non-orthogonal axes.

It might change the belt geometry by a small amount but this is mirrored on the other belt, so the effect should be equal on both sides of the cube. However Im now using 101 steps/mm on x and y to achieve a 20mm x 20mm cube.]]> DjDemonD CoreXY Machines Wed, 13 Apr 2016 09:23:54 -0400 https://reprap.org/forum/read.php?397,650827,651898#msg-651898 Re: x and y calibration issue https://reprap.org/forum/read.php?397,650827,651898#msg-651898 defcon.no]]]> the_digital_dentist CoreXY Machines Wed, 13 Apr 2016 08:40:59 -0400 https://reprap.org/forum/read.php?397,650827,651868#msg-651868 Re: x and y calibration issue https://reprap.org/forum/read.php?397,650827,651868#msg-651868
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DjDemonD
So I tried that and predictably got a parallelogram not a cube.

Back to the belt tension I suppose. The odd thing is it was printing both sides reasonably close (within 0.05mm) before I changed to from 20t to 16t pulleys to see if it improved the resolution.

Did changing the pulleys affect the resolution ?]]> Holy1 CoreXY Machines Wed, 13 Apr 2016 07:04:36 -0400 https://reprap.org/forum/read.php?397,650827,651132#msg-651132 Re: x and y calibration issue https://reprap.org/forum/read.php?397,650827,651132#msg-651132 DjDemonD CoreXY Machines Mon, 11 Apr 2016 12:37:15 -0400 https://reprap.org/forum/read.php?397,650827,651127#msg-651127 Re: x and y calibration issue https://reprap.org/forum/read.php?397,650827,651127#msg-651127 Edvardas CoreXY Machines Mon, 11 Apr 2016 12:22:39 -0400 https://reprap.org/forum/read.php?397,650827,651125#msg-651125 Re: x and y calibration issue https://reprap.org/forum/read.php?397,650827,651125#msg-651125 the_digital_dentist CoreXY Machines Mon, 11 Apr 2016 12:21:46 -0400 https://reprap.org/forum/read.php?397,650827,651051#msg-651051 Re: x and y calibration issue https://reprap.org/forum/read.php?397,650827,651051#msg-651051
Back to the belt tension I suppose. The odd thing is it was printing both sides reasonably close (within 0.05mm) before I changed to from 20t to 16t pulleys to see if it improved the resolution.]]> DjDemonD CoreXY Machines Mon, 11 Apr 2016 09:02:22 -0400 https://reprap.org/forum/read.php?397,650827,650827#msg-650827 x and y calibration issue https://reprap.org/forum/read.php?397,650827,650827#msg-650827
Should I be looking to change my x steps/mm relative to y?]]> DjDemonD CoreXY Machines Sun, 10 Apr 2016 17:35:36 -0400