Z Home Strange behavior
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One more curios thing. A couple of the end stop lights don't fully turn off after I do the home routine. They do turn off if I manually press the end stops but if homing they stay dimmed for some reason – specifically X and V which are the my 1st gantry X axis limit switches. Didn't notice that before -- wonder why all others turn off fully and these stay dimmed.
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What type of endstop switches are they? Are you talking about lights on the Duet or on the switches themselves?
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Just regular mechanical end switches. Yes lights on the duet which are on when end stop is not triggered and off when they are.
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If the lights on the Duet are dimming, that sounds like the voltage on the 3.3V rail could be dropping, perhaps du to an overload. That would also cause the motor drivers to be shut down.
Do any of the blue 12V, red 5V or green 3.3V LEDs on the edge of the Duet dim too?
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If the lights on the Duet are dimming, that sounds like the voltage on the 3.3V rail could be dropping, perhaps du to an overload. That would also cause the motor drivers to be shut down.
Do any of the blue 12V, red 5V or green 3.3V LEDs on the edge of the Duet dim too?
Nope – what I'm saying the lights should be off, but they're not full off, they're very dim
So the behavior is as follows.
When machine is moving and everything is powered -- the red limit switch LEDs are nice and bright -- then when I home, all of the limit switch lights, except the X and V limit switches turn off, those are almost off -- I'd say 20% of full brightness. Like something is not pulling them to ground all the way.
I checked the 3v rail with a volt meter and it's rock solid 3.3v -- was just verifying some things on the LCD headers. -
Oh, and when not homing, if I power the machine on and have it moving and such – so that means all the stepper drivers are active. If I press those limit switches with my finger -- the lights turn off completely -- the 20% dim behavior only happens when machine homes.
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PS - I've discovered a bug that might possibly explain some of the odd behaviour. Will be fixed in 1.20beta2, which I hope to release later this afternoon.
Any update on when you expect this released, I can't use 1.20b1 as it freezes on homing routines, 1.19 is better but repeated homing gets it to freeze also – and longer Z moves are a problem in both versions. I thought I had found one of the reasons for the issues was a faulty ethernet cable, and 1.19 became more stable, didn't help 1.20b1 --still can't home.
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1.20beta2 is now released.
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1.20beta2 is now released.
I saw – leaving work in a few minutes. Will be able to try it in a couple of hours. Kinda glad I ditched the noisy TB6600 drivers -- will put them in a draw for a future CNC build
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I found something which appears to make my Duet behave.
At the end of config.g I added the following
Now homing works reliably, I no longer have B (2nd Z axis fail to home, basically fixed the glitchiness I was seeing)
I don't really know why toggling Z 1 micron fixes things, but it does.
Can you implement M17 gcode command, then I wouldn't need to do that weird micron move
T0
G91
G1 Z0.01
G4 S5
G90
M300 S300 P2000
M18
