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Not able to get the correct Z-position

Posted by AlpinaV8 
Not able to get the correct Z-position
May 08, 2017 08:45AM
Using K8200 with a servo assisted Z-switch on Merlin 1.1.0 Bugfix
(Also tried a capacitive sensor with the same result)

When homing Z, it does it work, and then lifts up to 30. The real distance is however 27, and whatever settings I change (E.G: Z_PROBE_OFFSET_FROM_EXTRUDER) it will show different Z positions, but always 28 in real. So the head will crash.
If I send a M206 Z-3 after Z-home it's about correct, but a G29 will again destroy the result. Tried the most :-)

My settings are:
#define Z_PROBE_OFFSET_FROM_EXTRUDER -10.8 // Z offset: -below +above [the nozzle]
#define Z_SAFE_HOMING

Any helt would be very helpfull and appreciated!

best regards,
Knut
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