Z Offset is always too far.
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Hello,
Even after carefully calibrating the Z-probe and setting the Z-offset at Config.g, or manually sending very aggressive Z off-set values with G31 with the console the nozzle is ALWAYS too high..............
I always need to "baby step" the first layer. If I home Z and send the nozzle to the probe position and to Z=0 it is too far from the bed. What am I doing wrong?
Config-override is clear and only contains PID data....
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Just as a teste a did it again:
Cleared the mesh, calibrated the probe, home all and send the nozzle to the probing position and Z=0: there it is the nozzle almost 1mm high... Always the same more or less amount too high.
G30 S-1
Stopped at height -0.551 mm (more or less always the same value...)
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Probe type and configuration? Firmware version?
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@phaedrux I think I just found (your) answer to the issue at https://forum.duet3d.com/topic/5097/z-offset-issue-probably-me/8
I'll try it....
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@phaedrux said in Z Offset is always too far.:
Probe type and configuration? Firmware version?
Probe type 5 (servo deployed with optical endstop connected to Z_Probe_In)
Firmware Version: 2.0(RTOS) (2018-06-05b3)
Issue is probably related to my home Z or home all macros.......
; homez.g
G91 ; relative positioning
G1 Z5 F4000 S2 ; lift Z relative to current position
G90 ; absolute positioning
G0 S0 X119 Y140 F4000 ; move to center of bed
M98 Pdeployprobe.g ; deploy mechanical Z probe
G91 ; relative positioning
G1 S1 Z-295 F1800 ; move Z down until the switch triggers (first pass)
G1 Z5 F1800 ; go back a few mm
G1 S1 Z-295 F180 ; move Z down until the switch triggers (second pass)
G1 Z10 F1800 S2 ; lift Z relative to current position
G90 ; absolute positioning
M98 Pretractprobe.g ; retract mechanical Z probeI am not using G30 as you mentioned at the above link
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That could very well be it. You'll also be able to remove the manual M98 calls to deploy and retract the probe as G30 should take care of that automatically.
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@phaedrux Just realised that when testing the new homing macros. Will do.
Thank you.