Homing problems
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@phaedrux
in the past when the printer homed it set the height after homing to homed height (the one in the config). Now it seems the printer thinks on power on he is homed, then adds the height he travels upwards while homing the first time and adds it ontop.
Then of course he ends up at z=600-800 something and can't travel anymore because he is higher than the maximum z-height i have configured. -
@capmjk said in Homing problems:
Now it seems the printer thinks on power on he is homed,
I am not sure whether you updated, because config says RRF version 2, and M122 tells your firmware is 3.3. Your endstops may have been S0, which is not valid in 3.3 any more, you need to use S1 with a !, please check https://duet3d.dozuki.com/Wiki/RepRapFirmware_3_overview#Section_M574 first statement, if the endstops behave opposite now.
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At first power on does the DWC think the printer is homed?
If you send M119 to check the endstop status does it think they are triggered when not actually depressed?
Have you re-run a delta auto calibration since we solved the original homing problem?
Have you removed the G29 S1 from config.g yet?
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@phaedrux
No it tells me that no axis is homed.
M119 tells me that all endstops are working properly.
I have to run a delta calibration after every boot at the moment, else it doesn't print correctly.Have removed G29 S1 from config.g.
Still weird stuff. Have to zero x and y every time after boot. Its driving me mad even though its only 2 quick commands.
The problems arose before i updated the firmware, came out of the blue.
Well yesterday of my belts ripped so i replaced all of them. I think my printer just punishes me for organizing a second one and buying a duet 3 for the new one.
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@capmjk update:
calibration now also needs to be done after every bootup. else the heightmap is wrong
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@capmjk said in Homing problems:
; Endstops
M574 X1 S1 P"xstop" ; configure active-high endstop for high end on X via pin xstop
M574 Y1 S1 P"ystop" ; configure active-high endstop for high end on Y via pin ystop
M574 Z1 S1 P"zstop"I wonder why M574 sets the endstops to low end. IMO it should be X2, Y2, Z2.
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@joergs5 thats true. I changed it but i wonder why it worked for so long.
OK now i got a different problem. Now it ALWAYS sets height after homing to the original homed height but does not save the z- value after g30
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I may not understand your comment correctly, but homed height would only be saved if you run a delta calibration and then send M500 to save it to config-override.g.
Nothing will get saved after just sending G30. That will only be applied for the current power on cycle.
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@capmjk you will not be able to store the Z position between reboots, because when stepper are turned off, they change position by +- 2 full steps each in worst case. It's necessary to measure Z0 position every time after power on and let set the firmware the stepper position.
Another point because you said mesh compensation is not correct: G31 is set to have 0 offset for X and Y, is this correct? Is your probe at the same XY position like the nozzle?
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@joergs5 yes. My current probe is manually attached but centered directly below the nozzle.
i know that the current z-pos cannot be saved but before i made your change with the endstops even the homed height was gone after every power off. That is working now
@Phaedrux since i corrected the endstop position to be top side z height is not even saved within a power cycle. As an example: I moved the printer to z=0 after homing and it was 20mm above the bed. So i put g92 z25 -> moved it down until it was the correct height, put g92 z0 in, then M500 and homed. But after the homing z0 was again 20mm above the bed. So even in the power cycle it did not remember the new z0 height and instead set the original homed height after homing.
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@capmjk said in Homing problems:
moved it down until it was the correct height, put g92 z0 in, then M500 and homed. But after the homing z0 was again 20mm above the bed. So even in the power cycle it did not remember the new z0 height and instead set the original homed height after homing.
That's not how homed height is saved. You must do a delta auto calibration and then save it with M500.
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@phaedrux i know that now. It worked though because my endstops were wrongfully configured as low end for the last year. Don't ask me though WHY it worked that way.
By the way: Its all working properly now. Thanks alot all of you!
I will be back in time probably since i am currently installing my new Duet 3 into my second printer.
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