Motor and heated bed

Hi,

I have two problems :

The first one is on a piggypack to motor step Z axis. In fatc I’m not able to change the voltage value because a part of potentiometer is not present (when I need to put the screw driver). Can you say oh to do to change the piggy back. Do I need to send it ?

The second one it’s about the bed, this one is not plane straight. And I’m not able to print becaus is not possible to calibrate the 0.25mm everywhere between the nozzle and the bed. How can I solve that ?

Thanks in advance

Best regards

TheBugLife

[quote=“thebuglife”]The second one it’s about the bed, this one is not plane straight. And I’m not able to print becaus is not possible to calibrate the 0.25mm everywhere between the nozzle and the bed. How can I solve that ?[/quote]I had the same problem.
I opened the bed again and put the metallic base on a flat table. I bend the base as long as necessary to get a flat connection to the table surface. Then I remount all the parts of the bed. (Be careful not to damage the NTC, when you mount the heater on the base - take care to the orientation!)
A