need Guru on duet 3 mini5 using stall guard/sensor less homing

moth4017

Ok i have noticed this:-
hit the "emergency stop " button and all i run is "max z home. g" Macro as above , but its always motor 0.4 that doesn't move.
if i switch on the printer (mains on) in the config i run the same macro "max z home. g" and its motor 0.4 that doesn't move .

this seems to happen 100% of the time well i did 20 tests and it happened each time.

so here is where its gets a bit odd, i swapped stepper motor wiring 4 and 6 , re did config so the stepper motor order in M584 was in the correct order again , but now its stepper motor 0.6 playing up.
so could this be a software issue as it always seems to be the first stepper in the M584 list , or just coincidence?

fcwilt

@moth4017 said in need Guru on duet 3 mini5 using stall guard/sensor less homing:

No more Gurus out there playing with the Duet 3 mini5 tmc2209

I setup homing via stalling and it worked. Compared to an actual endstop sensor it made quite a thump.

I quickly installed actual endstop sensors.

I don't like thumps.

Frederick

oliof

@moth4017 since you swapped the wiring as well it's hard to say.

moth4017

@fcwilt

I have the x y sensorless homing well just a gentle tap for homing,
the Z homing max also works with a gental tap, but sometimes the motor just stalls and doesnt move.

moth4017

@oliof
i suppose it rules out if it was a mechanical issue ..

oliof

sure, but I would check the wiring on both ends anyways to ensure there are no bad crimps.

moth4017

@oliof

thats has caught me out in the past before , that would be a nice easy fix :), but not this time .

fcwilt

@moth4017 said in need Guru on duet 3 mini5 using stall guard/sensor less homing:

@fcwilt

I have the x y sensorless homing well just a gentle tap for homing,
the Z homing max also works with a gental tap, but sometimes the motor just stalls and doesnt move.

That suggests you are reducing the current too much (I assume you are reducing the current) which helps with obtaining the gentle tap but also may be creating the lack of movement.

Frederick

moth4017

@fcwilt

Ive tried settings from low to high in the sensitivity H settings from 50 to 700 current from 10% to 100% .

it does seem to be 90% of the time the first stepper motor listed in M584 stalls

fcwilt

@moth4017 said in need Guru on duet 3 mini5 using stall guard/sensor less homing:

@fcwilt

Ive tried settings from low to high in the sensitivity H settings from 50 to 700 current from 10% to 100% .

it does seem to be 90% of the time the first stepper motor listed in M584 stalls

Well, that rules out that theory.

I don't use the "stall guard" feature and know only the basics.

Good luck.

Frederick