I have a strange problem with my Printrbot Simple Metal.
When I start printing it's suddenly trying to go off axis before starting to print. All is fine once it actually starts to print, but it's very annoying to hear the sound on the start and end of each print.
That can't be good on the motors and chains either, something is going to give out at some point.
Here's what that sounds like: YouTube - IMG 5600.
My OctoPi settings are: