Duet 3 mini 5+ sensorless homing will not work

Veti

it is. but the problem is your current programmer

Alucardi

@jay_s_uk which means something is not working. It should detect directly. I tried it in my old duet 2 when I was setting that up. It detected a stall as soon as it tried to move the axis.

Alucardi

@Veti my current programmer?

Veti

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

my current programmer?

have you read the linked thread?

Alucardi

@Veti yes and I am no coder so I do not know what a iap file is ‍️ Thread is a month old.

Veti

@Alucardi

just replace the iap file linked in the thread and update the firmware again.

Alucardi

@Veti I have uploaded that file to my card and managed to update I believe. But why does it have to be manually fixed? Not everyone goes to the forum and look on that thread. I downloaded 3.2 a week ago and assumed it was working fine cause I got no error. Just by luck did I see it still said beta when looking around in the menus. I then redownloaded the needed files but it was still on beta.

Alucardi

This might be one thing that cause my issue. Changed to X2 and Y2 and it seem to work.

; Endstops
M574 X1 S3                                               ; configure sensorless endstop for low end on X
M574 Y1 S3                                               ; configure sensorless endstop for low end on Y
M574 Z1 S2                                               ; configure Z-probe endstop for low end on Z

fcwilt

All these posts and we forgot to verify what firmware you were using?

That's a bit embarrassing.

Frederick

Alucardi

@fcwilt not firmware issue it was endstop issues. Card was on rc2 when it came, sensorless homing worked then.
I had this code though M574 X1 S3 but it should be M574 X2 S3. Now it homes x and y. Still get G28 homing failed though. After X and y it just sits there. Will not issue a move to center of the plate. So if you have any input on my z homing sequence that would be awesome. Z axis is reported as homed though.

fcwilt

@Alucardi said in Duet 3 mini 5+ sensorless homing will not work:
So if you have any input on my z homing sequence that would be awesome. Z axis is reported as homed though.

Do you still have this line of code:

G30 P0 G1 X167.5 Y167.5

Frederick

Alucardi

@fcwilt yes i do.

fcwilt

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

@fcwilt yes i do.

OK then that is likely the problem.

You need to use G30 by itself.

Unfortunately G30 without a P parameter does not respect the X and Y parameters.

So you have to precede the G30 with a G1 command to move the probe to the correct XY location.

For my printer X=0 and Y=0 is the center of the bed so I can simply use the following G1 command:

G1 X{-sensors.probes[0].offsets[0]}, Y{-sensors.probes[0].offsets[1]}, F6000

to move the probe to the center of the bed.

A somewhat more complicated formula can be constructed for printers where X=0 and Y=0 is NOT the center of the bed.

Frederick

Alucardi

@fcwilt I did add and try this. But it just sit at 0 and then say z is homed. It does not even push the probe out.


G1 H1 X167.5 Y167.5
G30 P0  			    		; home Z by probing the bed

fcwilt

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

@fcwilt I did add and try this. But it just sit at 0 and then say z is homed. It does not even push the probe out.
G1 H1 X167.5 Y167.5
G30 P0  			    		; home Z by probing the bed

Remove the H1 and the P0

Frederick

Alucardi

@fcwilt I works kinda, not moving the axis though.

fcwilt

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

@fcwilt I works kinda, not moving the axis though.

You mean it is not moving the probe to the center of the bed?

I'm guessing X167.5 and Y167.5 are the center.

Does the bed get probed?

Thanks.

Frederick

Alucardi

@fcwilt Whit this code it will just sit in the back corner where i home the printer:

G1 X167.5 Y167.5 F5000
G30 	  			    		; home Z by probing the bed
G90                   	  		; absolute positioning
M400							; finishes all current moves and and thus clears the buffer
M569 P0.0 D2  	    			; restore default for motor
M569 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

With this code it will at least move the Y axis and deploy the probe. But it will not detect that probe is activated. If i add - to X it will not move

G1 X167.5 Y-167.5 F5000
G30 	  			    		; home Z by probing the bed
G90                   	  		; absolute positioning
M400							; finishes all current moves and and thus clears the buffer
M569 P0.0 D2  	    			; restore default for motor
M569 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

On my old setup it homed up in the back left corner but 0 was in the closest left corner. Not sure how to set this up. That might be why coordinates do not work as they used to. I will add my old home all and config for you to compare if you want.

mini 5+ homeall.g mini 5+ config.g Duet 2homeall.g Duet 2config.g

fcwilt

OK to be safe move the G90 to BEFORE the G1

And use X167.5 and Y167.5 as in the first example you posted.

Then try again.

Frederick

Alucardi

@fcwilt Using this code with or without a - sign makes it just sit in the corner and motor just rams the corner. I also edited my other post. Please read it.

G90                   	  		; absolute positioning
G1 X167.5 Y167.5 F5000
G30 	  			    		; home Z by probing the bed