Belt Tension Issues - Prusa I3 MK3S  

Belt Tension Issues - Prusa I3 MK3S

Hi Everyone,

Got my printer pre-assembled from Prusa and printed a couple of benchy's which were fine but was getting crash detected but the printer carried on, on my most recent print the printer paused on a crash so decided to do some troubleshooting.

I flashed the latest firmware and ran a belt test (which was stated on the crash detected guide from Prusa) here - https://help.prusa3d.com/en/article/crash-detection_2100 and got results just under 230 for both X and Y, I adjusted the X Axis by one notch on the belt and the adjusted the Y axis with the screw to loosen but still get the same results when running the belt test.

I read on another forum post on here that the number from the belt test doesn't update until you run a self test so have done that this morning and the results still are only marginally above 230 for both.  The self test comes back ok.

I thought I had spotted in another post about something about rods / bearings being too tight but can't find it again now - given mine was pre-assembled I hope that wouldn't be the issue but unsure what I'm supposed to be checking.  I guess if the motor is measuring torque for the test and the bearings aren't flowing freely enough then could this impact the results of the test?

I've looked at the guide for adjusting the X-Axis screw (for smaller adjustments) and it doesn't make sense to me about what the top screw is doing next to the X-Axis motor.  There is a very real chance that I'm being somewhat thick here but I've read it several times and don't understand.  Nothing on YouTube from Prusa about belt tensioning which I thought would be in the setup video 🙁

Any help or assistance appreciated!

Thanks,

MDX