Calibrating a Mini Kossel
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I'm trying to calibrate my mini kossel, using the Duet3D guide.
I get through it all ok, but if I home the carriage and re-do the calibration its always out, ususlly X=0 is too high. I've tried sending M500 before homing no difference.
How can I get it to keep its calibration? -
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Are you using M501 at the end of config.g? You need to do that for your changes saved using M500 to take effect when you restart.
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Are you calibrating with the bed and hot end at stable temperatures? Because deltas home to maximum, the Z=0 position may vary if the temperatures are not stable.
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If you are calibrating with the bed heater on, have you allowed it sufficient time for the temperature to stabilise across the bed? It's not uncommon for bed plates to warp with temperature. Depending on the placement of the bed thermistor, it may take several minutes fr the bed to reach full temperature even after the thermistor reports that it has.
HTH David
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