Having trouble setting the z offset
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My printer homes with the bl touch as the z end stop fine. I also does the bed compensation and gives a report of the bed after it done the probing. Just can't adjust the z offset. The weird part is, I have installed a Duet Ethernet on a different printer with a BL Touch and that one works fine. I did the install on this Duetwifi the same and can't figure out why the z offset refuses to change. I had this board working with an inductive sensor and it worked, but was not consistent.
1. Do you by any chance have your homez.g and Z homing part of homeall.g configured as if you are using an endstop switch, instead of using G30 commands?
2. Have you checked whether the G31 command in config.g is being overridden by one in config-override.g?
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The files were all created with the configurator. The homeall.g has never worked correctly and when I look at the file, it is greek to me. When I home all, it starts with the x axis and the x axis starts grinding and slowly moves away from the endstop. I have to either cut the power of press the emergency stop to get it to stop. However, I can home the machine by homing each axis separately. The configurator will not let you configure a z endstop, only a probe. Or I never figured out how to get the configurator to configure a z endstop. This machine operated fine with the inductive sensor I had installed and I could change the z offset no problem. It just wasn't consistent. The G31 line in config.g has the z offset as 0 and the override file has the z offset as 2.4. I have been changing the z offset in the override file as that is what should be being used. They are posted above.
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For some reason, I can now change the z offset in the config override file and it takes effect now.
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Well congrats I guess?! That’s odd.
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The files were all created with the configurator. The homeall.g has never worked correctly and when I look at the file, it is greek to me. When I home all, it starts with the x axis and the x axis starts grinding and slowly moves away from the endstop. I have to either cut the power of press the emergency stop to get it to stop. However, I can home the machine by homing each axis separately.
Please post your homing files.
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; homeall.g
; called to home all axes
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; generated by RepRapFirmware Configuration Tool on Thu Apr 27 2017 06:26:16 GMT-0700 (PDT); Relative positioning
G91; Lift Z
G1 Z5 F6000; Course home X or Y
;G1 X-305 Y-305 F1800 S1
; Course home X
G1 X-305
; Course home Y
G1 Y-305: Move away from the endstops
G1 X5 Y5 F6000; Fine home X
G1 X-305 F360 S1
; Fine home Y
G1 Y-305 S1; Move Z down until the switch triggers
G1 Z-285 F1800 S1; Absolute positioning
G90; Tell the firmware where we are
G92 Z2.5; Uncomment the following line to lift the nozzle after probing
;G1 Z5 F100A little late, but here is my homeall.g file.
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The G1 X-305 Y-305 … is commented out so you need to remove the semi colon from the beginning of that line.
The next lines G1 X-305 and G1 Y-305 (course homing X and Y) don't have an S1 parameters so they will ignore the end stop switch. They should be G1 X-305 S1 and G1 Y-305 S1
The bed is being probed at the X0 Y0 position for the Z axis and while it will work, it's generally better to probe the centre of the bed
for Z home so you might want to add something like G1 X150 Y150 F6000 before the G1 Z-285 move. -
Thanks. Still learning the g-code world. Didn't even notice the first line was commented out.
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Thanks. Still learning the g-code world. Didn't even notice the first line was commented out.
No worries. Read and inwardly digest this and you'll become an expert https://duet3d.com/wiki/G-code.
Alternatively bookmark it for easy reference in the future. -
My home all is now working like it is supposed to. And my z offset is working.
