Problem with m291

schpongo

Hey guys,
I'm having trouble using the m291 command.

My setup is a Duet 3 6HC + a Duet 3HC expansion shield and a RPI setup as a SBC.

I'd like to run the following macro, but when the message shows up and I click ok the code after the m291 command is not executed. The message then goes away but the printer says it's busy. The same happens when I click cancel.

if !move.axes[0].homed || !move.axes[1].homed || !move.axes[2].homed
	G28
G1 Z350 F4000

M291 P"The bed will home next. Remove all object from the bed!" R"Warning" S3
G1 Z 300
M98 P"homew.g"

dc42

There have been some fixes to M291+SBC in RRF/DSF 3.2beta. @chrishamm has the details.

schpongo

How does one go about updating the Duet 3 with a SBC to beta software? The getting started page does not mention anything about that.

A Former User

@schpongo said in Problem with m291:

How does one go about updating the Duet 3 with a SBC to beta software? The getting started page does not mention anything about that.

https://forum.duet3d.com/post/178813

schpongo

Thanks for the quick reply, before I do that, I would also like to know what I need to do to go back to the stable branches?

A Former User

same thing just replace unstable with stable on the first line.

(presumably you can skip line #4 but it won't hurt either)

schpongo

Thanks for the quick answer.

chrishamm

M291 did not work well before RRF 3.1 so I presume you're still on an old firmware/DSF version. Please update your Duet as described here: https://duet3d.dozuki.com/Wiki/SBC_Setup_for_Duet_3#Section_Connecting_via_SSH

@dc42 The M291 fixes from 3.2-b1 only affect PanelDue in SBC mode.

schpongo

@chrishamm Hmm.. I'm actually on 3.1.1. I did not yet do the update to the beta Version. Might there be something else that I'm doing wrong?

schpongo

I'm still on 3.1.1 and I'm still having issues with the the M291 command. Here is the macro I'm trying to run:

; ToDo check Temp of bed and nozzle, so both are cold
; Cancel any currently active mesh compensation 
M561
; Set z-probe trigger height to 0
G31 Z0
G1 X0 Y0 Z200 F6000 
M291 P"Move to point were the z probe shall be calibrated." X1 Y1 S2
M291 P"Get a 0.1 mm thick metal spacer" S2
while iterations <= 5
	G1 Z50
	M291 P"Remove the z probe sensor if it is already or still attached" S2
	G1 Z5
	M291 P"Move FFF nozzle down until it just grabs a 0.1 mm thick metal spacer and then remove it." Z1 S2
	G92 Z0.1
	G1 Z50
	M291 P"Attach the z probe" S2
	G30 S-1

M291 P"Now calculate the average of the test. The average is the z probe trigger height for that point. Set it the config.g with G31 Z{ave} " S2

After I click OK from the first M291 in line 7 the machine just stays busy and the second window does not open.