Z creep up after long idling
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I had a few occasion that after leaving my Kossel on for a few hours, when I try to print again the Z seems to be a bit too high (maybe about 0.2-0.4).
0.9 degree motors with Idling current set to 60%.
I would expect the Z to drop instead of moving upwards after long idling, just wondering why this is happening.
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Thermal expansion?
