Trigger Height and a lot of confusions
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I assume you're talking about this process?
The response logged in the console when doing G30 S-1 should be correct if you're following those procedures.
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@phaedrux should it be stopped @ 0?
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Well not necessarily. It should stop at the trigger height.
For nozzle contact probes that would be at 0 or slightly negative as it presses into the bed a bit. For proves that have a switch of some kind mounted above and to the side of the nozzle it would be some positive value.
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@phaedrux BUT when i drive to z=0 after g32 i should above the bed?
That isnt working
It drives IN the bed
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state: M665 R225.5 L450 B185 H410.500 M558 P8 R0.4 H5 F1200 T6000 G31 P100 X0 Y0 Z0 Nozzle 210° Bed 60°-
Make sure the dynamic test is successful (Z probe stops when it senses the bed) before doing this.
-> Done. works. Bed stopped after g30 -
Use the X and Y jog buttons to position the nozzle over the centre of the bed
-> Done x0 Y0 -
Jog the nozzle down until it is just touching the bed or just gripping a sheet of paper. If the firmware doesn't let you jog it down far enough, send M564 S0 to disable axis limits.
-> paper scratched @ Z 1.84 -
Once you have the nozzle touching the bed, send command G92 Z0 to tell the firmware that the head is at Z=0
-> Done ... Z=0 -
Jog the head up by 5 to 10mm
-> Done M120
G91
G1 Z5 F6000
M121 -
Send command G30 S-1. The nozzle will descend or the bed rise until the probe triggers and the Z height at which the probe stopped will be reported.
-> G30 S-1
Stopped at height -0.029 mm
Z=-0.03 -
Repeat from step 5 two or three times to make sure that the trigger height is consistent.
-> -0.022 -0.029 -0.022 -0.029 -
In Duet Web Control, go to Settings -> System Editor and edit the config.g file. Set the Z parameter in the G31 command to the trigger height that was reported. Save the file.
-> G31 P100 X0 Y0 Z-0.025
saved -
Open config-override.g and check that there are no G31 commands in it. If you find any, delete those lines and save the file.
-> done . Only PID tuning Stuff in the override -
To apply the new trigger height, restart the Duet by sending M999 or pressing Emergency Stop.
-> Restarted
After All:
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G32 (look at pastebin)
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After that it stops at Z=5
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when i drive to Z=0 or start the print ---- the nozzle crashes in the bed.
G30 S-1 Stopped at height 0.797 mm
So annoying ... whats my mistake?
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After all:
When i do a G30 i got the correct height ....
Why does the g32 (bed.g) does not this? -
i realized that there are not compensation in use.... this is exactly what the g32 should to right?
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@niels g32 will only run the commands in bed.g
Do enable the compensation there must be a g29 S1 at some point to load the saved heightmap or G29 to run a probing cycle.
Usually best put in the slicer start gcode. Or at the end of bed.g which ever makes best sense.
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Yes. i know ..
in my bed.g i do alot of g30 and the last one with s6.
--> fail
when i do a single s30.. it sets the height correctly....
this is what i didnt understand
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Being that this is on a delta all I can recommend is to recheck your calibration routine. Not my area of expertise unfortunately.
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Try running G32 twice after power up before you drive to Z=0. If the M665 parameters in config.g are a long way from the true values, then there can still be a height error after running G32 once. This is especially true in firmware 2.03, and there will be a 2.03.1 release to fix this.
