Duet 3 mini 5+ sensorless homing will not work

Alucardi

@Phaedrux I have read that thread a million times and still don't understand. I found out that 303 mah works. But still no dice. Sensitivity is -64 which is as sensitive as it goes and will NOT work, i tried 3.3 which i had before but wont work. It detects a stop after a while i think but it is not working as it should, i get error But the then i get error "G28
Error: Insufficient axes homed for bed probing
Error: G0/G1: insufficient axes homed"
So either i have a broken card, a card that will not work with my steppers even though a duet wifi did or i am missing something else. Just to prove it il add a video.
video

Phaedrux

Of the million times did you catch this post?

https://forum.duet3d.com/topic/20622/duet-3-mini-5-sensorless-homing-configuration/24?_=1610996023189

You need to run the stealthChop tuning procedure first. You can do this is the homing files.This is what I suggest:

Execute a tiny move (1 or 2 microsteps) away from the homing direction.
Pause for 100ms using G4.
Execute a small move away from the homing direction, e.g. 10mm.
Execute the homing move.
Don't forget to reduce current for the homing move (M913).

Alucardi

@Phaedrux i must be stupid but i don't understand it and others that have gotten it to work do NOT have that in their homeall.

Alucardi

@Phaedrux Figured it out but no affect.

M400							; finishes all current moves and and thus clears the buffer
M913 X34 Y34 					; drop motor current to 33%
M569 P0.0 P0.1 D3 V100    		; reduce V to ensure stealthChop is enabled
M915 P0.0 P0.1 S-64 R0 F0 H400	; sensitivity, don’t take action, don’t filter
M400 							; finishes all current moves and and thus clears the buffer
G91								; relative positioning
G1 H2 Z10 F6000	    	   		; lift Z relative to current position
G1 H1 X0.1
G4 P100
G1 H1 X20
G1 H1 X-335 F7000		   		; move to X
G1 H1 Y0.1
G4 P100
G1 H1 Y20
G1 H1 Y-348 F7000          		; move to Y
G30 P0 G1 X167.5 Y167.5    		; home Z by probing the bed
G90                   	  		; absolute positioning
M400							; finishes all current moves and and thus clears the buffer
M569 P0.0 P0.1 D2      			; restore default for motor
M913 X100 Y100 					; return current to 100%
M400							; finishes all current moves and and thus clears the buffer

Phaedrux

I don't have my mini5 in a corexy and I use endstops in the cartesian I do have it in, but I can go through setting it up and I can see if I hit any sticking points.

CoreXY is going to be different, but hopefully it's not a deal breaker.

@Alucardi said in Duet 3 mini can't configure sensorless homing + missing extruder:

i must be stupid

Do you need another banana break? Don't despair.

Alucardi

@Phaedrux why does this not work? is it cause other drivers cause it worked fine on my wifi. I need the printer but i wont redesign it for endstops. So if I cannot get this to work before end of this week il make sure to post a video on how to set fire to a mini 5+ lol (that isa promise)
Also i do believe something is broken since it will NOT detect a stall even if i pick -64.

Alucardi

played around with different move types and all i could find. Still no go.

M400							; finishes all current moves and and thus clears the buffer
M913 X50 Y34 					; drop motor current to 33%
M569 P0.0 D3 V60   		 		; reduce V to ensure stealthChop is enabled
M569 P0.1 D3 V60   		 		; reduce V to ensure stealthChop is enabled
M915 P0.0 S-54 R0 F0 H400		; sensitivity X, don’t take action, don’t filter
M915 P0.1 S30 R0 F0 H400		; sensitivity Y, don’t take action, don’t filter
M400 							; finishes all current moves and and thus clears the buffer
G91								; relative positioning
G1 H2 Z10 F6000	    	   		; lift Z relative to current position
G1 H2 X1
G4 P200
G1 H2 X20 F8000
G1 H3X-335 F7000		   		; move to X
G1 H2 X5 F7000
G1 H2 Y1
G4 P200
G1 H2 Y20 F8000
G1 H3 Y-348 F7000 				; move to Y
G30 P0 G1 X167.5 Y167.5    		; home Z by probing the bed
G90                   	  		; absolute positioning
M400							; finishes all current moves and and thus clears the buffer
M569 P0.0 P0.1 D2      			; restore default for motor
M913 X100 Y100 					; return current to 100%
M400							; finishes all current moves and and thus clears the buffer

gloomyandy

@Alucardi I realize this sounds like madness, but can you try setting the stall detection threshold to +63 (so S63 on the M915 for both motors) and see if it detects the stall then.

fcwilt

@Alucardi said in Duet 3 mini can't configure sensorless homing + missing extruder:

played around with different move types and all i could find. Still no go.

As I understand it this is a CoreXY machine.

Why are your X and Y motor settings not the same?

Why are you using G1 H3 moves?

Thanks.

Frederick

Alucardi

@gloomyandy do not work.

Alucardi

@fcwilt how should I move the axis then if not using g1? Should I not use H? In the guide it says to use it. I have tried H1/2/3/4 just to see if it makes any different but it does not.

fcwilt

@Alucardi said in Duet 3 mini can't configure sensorless homing + missing extruder:

@fcwilt how should I move the axis then if not using g1? Should I not use H? In the guide it says to use it. I have tried H1/2/3/4 just to see if it makes any different but it does not.

You are trying to home the X and Y axes to test sensorless homing - correct?

If that is the case G1 H1 is the correct variant to use.

And what about the motor settings being different for X and Y?

Frederick

Alucardi

@fcwilt it makes no difference what h I use. Be look further up and you will see that I used h1 also. S value is difference cause I can then test 2 values at the same time. But it makes for no difference if I use -64 or 64 it still will not detect a stall.

Alucardi

@fcwilt here is a new config still same issue it makes no difference what i do.

M400							; finishes all current moves and and thus clears the buffer
M913 X50 Y34 					; drop motor current to 33%
M569 P0.0 D3 V60   		 		; reduce V to ensure stealthChop is enabled
M569 P0.1 D3 V60   		 		; reduce V to ensure stealthChop is enabled
M915 P0.0 S-50 R0 F0 H400		; sensitivity X, don’t take action, don’t filter
M915 P0.1 S-50 R0 F0 H400		; sensitivity Y, don’t take action, don’t filter
M400 							; finishes all current moves and and thus clears the buffer
G91								; relative positioning
G1 H1 Z10 F6000	    	   		; lift Z relative to current position
G1 H1 X1
G4 P200
G1 H1 X20 F8000
G1 H1 X-335 F5000		   		; move to X
G1 H1 X5 F7000
G1 H1 Y1
G4 P200
G1 H1 Y20 F8000
G1 H1 Y-348 F5000 				; move to Y
G30 P0 G1 X167.5 Y167.5    		; home Z by probing the bed
G90                   	  		; absolute positioning
M400							; finishes all current moves and and thus clears the buffer
M569 P0.0 P0.1 D2      			; restore default for motor
M913 X100 Y100 					; return current to 100%
M400							; finishes all current moves and and thus clears the buffer

fcwilt

@Alucardi said in Duet 3 mini can't configure sensorless homing + missing extruder:

@fcwilt here is a new config still same issue it makes no difference what i do.

OK I will give it a go on my Duet 3 Mini and see if I can get it to work.

This will take a bit of time.

Frederick

fcwilt

@Alucardi

Well I got it to function on my work bench BUT it was erratic - failing more often than working.

Certainly not reliable enough to use.

If I find the problem I will let you know.

Frederick

Phaedrux

@fcwilt What settings did you end up with?

fcwilt

@Phaedrux said in Duet 3 mini can't configure sensorless homing + missing extruder:

@fcwilt What settings did you end up with?

You would ask me that. Let's see...

I basically followed the documentation and used the suggested values.

The following were already in the config file that I was using for testing my new board:

M92 X80
M201 X1000
M203 X10000
M566 X600
M906 X1000 I30

These I added for testing:

M569 P0 S1 V?? (I cannot remember V but it set the crossover speed around 180 mm/s)
M574 X2 S3 (the doc example has M574 X Y S3 which is missing the X and Y values)
M913 X70
M915 X S1 F0 H400 R1 (0.9 stepper - I just grabbed a handy one)

The "home" command was G91 G1 H1 X999 F10000 G90

Now I have never tried this before and I wasn't going to spend a lot of time trying to tweak it.

I was content to verify that it did work sometimes and perhaps just needed different settings or perhaps a different
stepper.

Back to my trusty optical end stop sensors.

Frederick

Alucardi

@fcwilt I don’t see what I am missing. My stepper works fine with my old board I guess I am sol. Others have made it work. Think I have a defective board or is it that firmware is not working as it should? Cause it seem like all I find are people having issues.

Edit: I did find this. But it is unclear if I should use s3 or s4. S4 says it stops the motors individuality but I don’t want that. S3 refers to be used with only 1 motor so I should not use that either. So what should I use?

fcwilt

@Alucardi said in Duet 3 mini 5+ sensorless homing will not work:

@fcwilt I don’t see what I am missing. My stepper works fine with my old board I guess I am sol. Others have made it work. Think I have a defective board or is it that firmware is not working as it should? Cause it seem like all I find are people having issues.

I wouldn't exactly say I got it to work. It worked maybe 1 time out of 10 tries.

~~For a Core XY I THINK you would use S4 so each motor would keep moving until it stalled.~~

OK so it turns out you use S3.

Did I mention that optical end stop sensors work great?

Frederick