https://forum.prusa3d.com/forum/original-prusa-i3-mk2-s-others-archive/problem-lost-same-steps-in-x-y/ Prusa3D Forum Discussion Board en-US Thu, 11 Jun 2026 03:34:02 +0000 wpForo 60 https://forum.prusa3d.com/forum/original-prusa-i3-mk2-s-others-archive/problem-lost-same-steps-in-x-y/#post-16137 Mon, 17 Oct 2016 09:02:30 +0000 You hardly convince somebody to use belt for $30 when there is belt for $2 and the only visible difference is numeric constant used in software. It's sad but it's reality.]]> Others (Archive) David T. https://forum.prusa3d.com/forum/original-prusa-i3-mk2-s-others-archive/problem-lost-same-steps-in-x-y/#post-16137 https://forum.prusa3d.com/forum/original-prusa-i3-mk2-s-others-archive/problem-lost-same-steps-in-x-y/#post-16128 Mon, 17 Oct 2016 03:55:13 +0000 I guess supplying and making stuff at home and not relying on China for parts, may be good for the West. When will we ever learn? Bottom dollar is often not top quality. Lets make things at home again. Bring home manufacturing and quality products and parts.]]> Others (Archive) Nigel https://forum.prusa3d.com/forum/original-prusa-i3-mk2-s-others-archive/problem-lost-same-steps-in-x-y/#post-16128 https://forum.prusa3d.com/forum/original-prusa-i3-mk2-s-others-archive/problem-lost-same-steps-in-x-y/#post-16124 Mon, 17 Oct 2016 03:41:24 +0000 Is there a better quality belt upgrade?]]> Others (Archive) Rutilate https://forum.prusa3d.com/forum/original-prusa-i3-mk2-s-others-archive/problem-lost-same-steps-in-x-y/#post-16124 https://forum.prusa3d.com/forum/original-prusa-i3-mk2-s-others-archive/problem-lost-same-steps-in-x-y/#post-16090 Sun, 16 Oct 2016 13:37:57 +0000 Allright, once again.
The firmware relies on the fact, that tooth pitch of GT2 belt is 2mm per tooth.
So if you want to make 100mm move, the pulley must pass 50 teeth.

If GT2 tooth pitch is smaller (less than 2mm per tooth, teeth closer to each other), it makes shorter move = printed objects come out smaller.]]> Others (Archive) David T. https://forum.prusa3d.com/forum/original-prusa-i3-mk2-s-others-archive/problem-lost-same-steps-in-x-y/#post-16090 https://forum.prusa3d.com/forum/original-prusa-i3-mk2-s-others-archive/problem-lost-same-steps-in-x-y/#post-16087 Sun, 16 Oct 2016 13:13:09 +0000 His prints come out smaller than intended, it means belts have teeth closer to each other than 2mm. David

You may want to review that.

Peter]]> Others (Archive) PJR https://forum.prusa3d.com/forum/original-prusa-i3-mk2-s-others-archive/problem-lost-same-steps-in-x-y/#post-16087 https://forum.prusa3d.com/forum/original-prusa-i3-mk2-s-others-archive/problem-lost-same-steps-in-x-y/#post-16082 Sun, 16 Oct 2016 13:01:11 +0000 Kai may have slightly over tightened and caused the difference. I don't think so. His prints come out smaller than intended, it means belts have teeth closer to each other than 2mm. Exactly what I measured.
BTW you need really extreme force to stretch GT2 belt. I tried to make it stretched to 2mm per tooth (200mm per 100 teeth) on Y axis. The force was so strong it made 8mm threaded rods on Y frame bended together. Unusable.]]> Others (Archive) David T. https://forum.prusa3d.com/forum/original-prusa-i3-mk2-s-others-archive/problem-lost-same-steps-in-x-y/#post-16082 https://forum.prusa3d.com/forum/original-prusa-i3-mk2-s-others-archive/problem-lost-same-steps-in-x-y/#post-16079 Sun, 16 Oct 2016 11:31:32 +0000 [quote="david.t2"100 teeth was 199.5mm not 200mm.

David

That is to allow for stretching and tight belts. Kai may have slightly over tightened and caused the difference.

Peter]]> Others (Archive) PJR https://forum.prusa3d.com/forum/original-prusa-i3-mk2-s-others-archive/problem-lost-same-steps-in-x-y/#post-16079 https://forum.prusa3d.com/forum/original-prusa-i3-mk2-s-others-archive/problem-lost-same-steps-in-x-y/#post-16075 Sun, 16 Oct 2016 11:10:02 +0000 I've created this calibration object recently http://www.thingiverse.com/thing:1818250
It usually takes only one test print to adjust steps/mm to correct values.]]> Others (Archive) David T. https://forum.prusa3d.com/forum/original-prusa-i3-mk2-s-others-archive/problem-lost-same-steps-in-x-y/#post-16075 https://forum.prusa3d.com/forum/original-prusa-i3-mk2-s-others-archive/problem-lost-same-steps-in-x-y/#post-16058 Sun, 16 Oct 2016 01:53:14 +0000
Thanks for the quick help. (change the steps/mm)

But i am sorry, every 10mm 0,04mm less is for me not good.
My Mk1 print a 180mm x180mm block with 179.8mm x 179.8mm that is ok.
My Mk2 print with 179.1 x 179.1

I see at the Mk1 that Prusa can make it better.

But now i try the M92. At the first moment it look realy great with the hand step now 100mm = 99.95mm :D

Yes and now is the print perfect.

Thank so much]]> Others (Archive) kai.h https://forum.prusa3d.com/forum/original-prusa-i3-mk2-s-others-archive/problem-lost-same-steps-in-x-y/#post-16058 https://forum.prusa3d.com/forum/original-prusa-i3-mk2-s-others-archive/problem-lost-same-steps-in-x-y/#post-16048 Sat, 15 Oct 2016 22:57:10 +0000 Kai

That is pretty good; I don't think you should be complaining!

There are a couple of things you could do; try printing perimeters first, slow down the print and if all else fails, change the steps/mm - there are plenty of posts detailing how to do this.

Peter]]> Others (Archive) PJR https://forum.prusa3d.com/forum/original-prusa-i3-mk2-s-others-archive/problem-lost-same-steps-in-x-y/#post-16048