[UM2 Bed Levelling - Mission Impossible?]

I've actually had the same issues described in this thread when I first started using the UM2, but I've implemented a different fix using two parts.

The printer that I have has the issue where one corner (front right in my case) was ~4mm higher than the other three corners and so the printer wobbled when printing. I didn't want to completely take apart the printer to fix the issue, so I came up with an alternative fix instead. The first part consists of length adjustable legs that attached to each corner to stabilize the printer:

 

 

 

The second part was the actual fix for the heated bed and involved a printed spacer wrapped in kapton tape to prevent the spacer from melting/warping. By wedging the spacer into the back left corner between the PCB and aluminum plate, I've turned the three point leveling system into a four point one with one corner being set at a fixed height. By tightening the rear screw, the height of the back right corner can be adjusted without affecting the back left corner. This adjustment is also independent from the front corners. It takes a bit of time to get it levelled this way, but once the bed is calibrated it stays pretty consistent from my experience (I print at 0.05 - 0.1mm layer heights).

 

 

Wish there was a more permanent fix, but it doesn't seem like there is one without taking apart and reassembling the printer.

 

Dear Spirit,

I have the same issue you are having with the back left corner not being level with the rest of the machine. Would you be so kind as to give me more information on the spacer part you printed and if possible, send me the file so I can print one myself? I'm a newbie to this so any help would be appreciated. Many thanks.