Calibrate Z Probe.
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If you are saying that the Z movement stops when th eprobe triggers and the result is 1.2mm each time, then you need to adjust this line in your config.g
G31 P500 X0 Y25 Z0.8 ; set Z probe trigger value, offset and trigger heightto
G31 P500 X0 Y25 Z1.2 ; set Z probe trigger value, offset and trigger heightor send M500 to have the new value stored in config-overide.g
If you adjust config.g then make sure there is no G31 command in config-overide.g
The 1.2mm is the offset distance between the nozzle and the probe trigger point, so it should remain static unless you move the nozzle or probe.
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@OwenD
Thanks.
I have done that several times, I now have 1.18 in that line.
If I now zog down to Z0 the nozzle is too far into the bad, the paper cannot be removed.Repeating the process gives, once again, 1.2.
There is no G31 in config-overide.g
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@Titus-A-Duxass
I'm assuming that you are restarting the machine after editing the G31 value in config.g
By your config you're using a limit switch.
Try reducing the F parameter in your M558 command even further to check if it's more accurate.
You can set two speed probing like this
M558 P5 C"^io4.in" H10 F600:60 T6000 -
@OwenD
I am restarting the mainboard as required after a config.g change, but I am not restarting the printer. -
@Titus-A-Duxass
At present G31 is 3.3
So having done G92 Z0, G1 Z5, G30 the toolhead returns to 0.76, I get this result repeatedly.
What I do not understand is having to enter 0.76 in the G31 line. Going from 3.3 to 0.76 is a huge change which makes no sense to me. -
@Titus-A-Duxass
At this moment the printer is unusable, uploading a print from both S3D and Cura results in the nozzle dragging across the bed. -
@Titus-A-Duxass Did you do
G92 Z0with the nozzle touching the bed ?
I feel like you sentG92 Z0again immediately afterG30 S-1returned its result. -
@Falcounet To be honest I cannot remember. I did find a mistake in my homez.g
G92 Z4 - I think that is incorrect and have changed to Z0.
Now when I jog down to the Z0 it stops 1.39mm above 0 and, naturally, I cannot jog below 0. -
@Titus-A-Duxass If you use a probe, you should use G30 for homing, not G92 Zx
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@Falcounet I have both the probe and the Z endstop switch.
I want to use the switch to set the height as I feel the probe is not so accurate.I have changed the G92 entry in homez.g to 1.4 and now when I do the procedure I get a constant 0.43 but now I get a report in the console, I have never seen a feedback report until I changed the entry in homez.g
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@Titus-A-Duxass If you don't use G30 to home, the G31 line is useless and the Z position is set by the endstop trigger and the value you use with G92 Zx.
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@Falcounet I think I have it now. I have set the G92 entry in homez.g to the height difference between the Z endstop switch trigger point and the height of the bed (1.5mm) and now it prints - it's only taken me 6 hours to find the solution.
