My 3D printer errored out about a week ago, but I haven’t gotten around to fixing it yet.

It’s an error I’ve had before, while printing, usually in prints that are over about an inch tall, where the print head rams into the y-stop, turns off the heater, and tries to continue printing… with an incorrect reference frame (it forgets where the center is).

I’ve talked to Colido about how to fix this before… and apparently it’s a loose belt.  That’s a really weird glitch given the symptoms, but the fix worked.  Shows that I have more to learn about the interactions between the hardware and software.

Now I’ve just gotta make time for the fix.  The instructions they directed me to are below.