MK2 Print quality issue on surfaces normal to Y axis

The Prusa i3 was designed by Josef Průša in 2012 with the Prusa i3 MK2 being released in 2016. The Prusa i3's comparable low cost and ease of construction and modification has made it popular in education and with hobbyists and professionals.
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Joined: Mon Jan 15, 2018 6:46 pm

MK2 Print quality issue on surfaces normal to Y axis

Post by BrownCoat40 » Mon Jan 15, 2018 7:08 pm

I'm having an issue with my MK2 sometimes having trouble printing vertical walls normal to the Y axis. It can usually print the walls perfectly fine, but sometimes it has some layers offset by about .6mm, like in the attached photo (a print of a shaft collar). The weird part is that I can have perfectly flat walls AND those choppy walls on the same print. For example, the attached photo has the offset layers on those outside bits, but the rest of the print is perfectly vertical. Has anyone seen anything like this?
20171227_093802.jpg (2.53 MiB) Viewed 1684 times
Checked my hardware and it all seems to be fine. No wobbling of the extruder, no play in the y-axis belt, tightened the bearing zipties, and replaced a bearing that had some play. Could this be a software issue rather than a mechanical one?
Thanks for any input.

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Joined: Thu Jun 15, 2017 10:24 am

Re: MK2 Print quality issue on surfaces normal to Y axis

Post by slippyr4 » Sun Jan 21, 2018 2:04 pm

I think that's mechanical. Is your Y-axis pulley on really tight? Is the Y belt holder screwed in tight?
Self-built Prusa i3 MK2 clone
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