Hi,
I’m getting lines randomly in the z axis using Black V4 sliced at 100microns. The printer sometimes throws a resin sensor error and pauses for a while until I do something with the cartridge. But these lines are left behind. This print only stopped once that I saw for resin sensor issues, but there are multiple lines on the print.
Any ideas?
Hello Komodo,
it can be the sensoring issue but more or less i see the problem more at the galvo mirrors.
If you try to clean them, don’t follow the Formlabs directions cleaning them with IPA!
Get yourself a cleaning kit for ccd chips like in a digital SLR camera. So you can not ruin your mirrors.
Best
Peter
Definitely recommend speaking to our support team, and they’d be happy to point you in the right direction to get this issue resolved as efficiently as possible. 
https://support.formlabs.com/s/contact-support?language=en_US
You seem to have a mechanical issue, has nothing to do with dirty mirrors.
Best to contact support for some fault finding.
Have you already tried printing a cylinder directly from the base up without cartridge error interruptions in between?
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