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DouglasPearless / Smoothie2

(Attempt at) A Smoothie firmware port to the Smoothieboard v2 boards.
GNU General Public License v3.0
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G30 Z-Probe does not return the same distance as probed down #7

Open DouglasPearless opened 7 years ago

DouglasPearless commented 7 years ago

When the Z-Probe returns after a successfully probe, it returns some 0.4mm less than the original travel so repeated G30's eventually do not return high enough to untrigger the Z-Probe itself.

DouglasPearless commented 7 years ago

I have been patiently debugging this for several days, and I discovered that the number of stepper motor down pulses is not the same as the up pulses.

For example, 3383 down but only 3780 up = 53 less pulses!

I am not sure why, but at least I have an area to look at now.