Curious bed calibration issue
Hello
I am running into a curious bed calibration issue on the MK3 I just assembled:
- Without the steel plate
- auto homing works fine, the PINDA probe ends up right in the first calibration circle
- when I attempt to calibrate the z axis, the probe positioned itself in front and to the left of the circle and calibration fails
- if I attempt mesh bed levelling, the first 6 points go OK, but the 7th one (left back) crashes into the bed and calibration fails
- With the steel plate, mesh bed levelling works perfectly fine
Of course, I checked that all the axes run freely and the PINDA probe sits 1mm above the hot end tip
Has anyone got an idea ?
Thanks in advance
Damien
Re: Curious bed calibration issue
Hi Damien,
mesh bed levelling is supposed to be done with the metal on, so I think you are expecting the printer to do something it's not intended to do
there are only 4 sense pads on the mk3 heatbed, so the other 5 sense areas are trying to sense the heating tracks on the PCB if the metal is not in place... not a good solution...
I hope this clears the matter for you!
regards Joan
I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK
Re: Curious bed calibration issue
Partially. It does not explain why bed calibration fails during the setup of the printer: the first calibration point is correctly recognised if I do a manual auto homing, but when I launch the XYZ calibration (either from the wizard or from the menu), the PINDA probe positions itself to the front and to the left of this circle and the calibration procedure fails (see picture).
Damien
Re: Curious bed calibration issue
I also noticed that the z axis did not go all the way up during this procedure. Could this be the reason of this failure ? Should I check for friction on the Z axes ?
Re: Curious bed calibration issue
Z axis must reach the top and "buzz" the steppers when xyz calibrating. If it does not then calibrate will fail as the printer has an incorrect measurement of the z height. As you say, investigate why the x carriage cannot reach the top of z.
Good luck!