MMU - Single nozzle, multi material (filament)

aceranic

@droftarts yes, I tried both Orca and Prusa, same.
Is group identical tools hiding them or what is the catch there?

I'll post on Thingie just have to change 2 holes for the spring bar which keeps the extruder idler open when not required, it makes filament path smoother.
Also it is designed for BMG clones, clear plastic ones, they are 2mm narrower than black ones. Didn't know this initially.

Will check expansion you posted for Duet 2.

Chameleon is a bit tricky as it is tight, springs inside held between 2 halves, I like the concept but not the design of it. I think this is why it didn't get to the users enough. Shame really.
Arduino and shield are working fine though and the concept I like really.

Must go deeper into what you mentioned to have it controlled by Duet.

droftarts

@aceranic said in MMU - Single nozzle, multi material (filament):

Is group identical tools hiding them or what is the catch there?

It just collapses the list. There’s a triangle to open the list of tools again, if needed.

Ian

o_lampe

@droftarts said in MMU - Single nozzle, multi material (filament):

it still outputs tool commands (T0, T1, T2 etc) in Gcode, even if you select 'Single Extruder Multi Material'. Not sure, but this might be a PrusaSlicer bug.

I guess the toolchange commands are required for different filament temps, diameter etc...
One can leave the macros empty, if not needed.

aceranic

@droftarts said in MMU - Single nozzle, multi material (filament):

Another thought: rather than use the endstop to trigger the Arduino, you could connect the wire to a spare output on the Duet, define it as an output with M950, and control the signal with M42, and trigger it that way. You could also use the either the tool change mechanism built into RRF to do the filament change (see here for the tool change macros

How would one do the above. Arduino board requires 5V to the pin, currently triggered by the limit switch, GPIO can also output 5V?
Is there an example for similar connections?
Ok, I believe I found that 3.3V is sufficient to trigger the input on Arduino.

Would this be good code?

; Define GPIO pin 1
M950 P1 C"exp.heater4" Q500 ; Allocate GPIO port 1 to heater4 on expansion connector, 500Hz

; Control GPIO pin 1 for 0.15 seconds
M42 P1 S1 ; Set GPIO pin 1 to high
G4 P150 ; Pause for 0.15 seconds (150 milliseconds)
M42 P1 S0 ; Set GPIO pin 1 to low

aceranic

@droftarts From which DWC version is tool grouping visible?

droftarts

@aceranic From 3.5.1, according to the release notes: https://github.com/Duet3D/DuetWebControl/releases/tag/v3.5.1

Tools, beds, and chambers can be grouped as single items

Ian

aceranic

@droftarts thanks, I am on 3.4.5
I got GPIO working and tools are being selected, etc. But when print starts it messes up with loading filament. Checking now.

I found out that when required to give 5 seconds it is not working, not loading. Hm.

aceranic

@aceranic updated everything.

One thing regarding the GPIO and Arduino. I connected pin13 and one ground pin from duet to arduino. Is this ok?
Does it require any additional resistors or other components?

droftarts

@aceranic said in MMU - Single nozzle, multi material (filament):

One thing regarding the GPIO and Arduino. I connected pin13 and one ground pin from duet to arduino. Is this ok?
Does it require any additional resistors or other components?

I think that should be okay. You're not pushing voltage from the Arduino into the Duet, so they are just sharing a GND. Should be fine, especially if they powered from the same PSU.

Ian

aceranic

@droftarts thanks on that. Still there is something not right as it does not react to pin low, 0V, for long pause.

Update - I had a problem with PS. Something with wiring as after I checked it, all is working now. Selection and loading as well. Still waiting for steeperonline motors as I use one from extruder pancake, not strong for selector to keep it in position.
Thanks!!