Multi color printing with Prusa's MMU V2 & Duet?

NicoLab28 · 4 Feb 2019, 08:05

You are in live drive, I looked at your Tipsmoothing.g
10s break anyway, it's just for testing, or is it really necessary?

On my side, it is not too much a problem of diameter of ptfe, I ordered, but of hair, which does not see itself and accumulates until stuffing. I should test your method.

I put transparent tube, and it is obvious.
The worst thing is that it's not regular, it happens from time to time. 15-20 tool change without worries, and boom!
That's why, I put a cutter.

I have the impression, that reliability will be a very hard thing to obtain.

I think I'll test the standard version, what change do you think you'll make? Your files are coming soon?

gavatron3000 · 2 Apr 2019, 08:16

look at the link above the info is there, but the files ill add are only for filament changes that affect T4 so 90% of printing is unaffected. if you getting strings you need to tune your ramming settings correctly. this you need to do on your slicer to suit your machine

@nicolab28 said in Multi color printing with Prusa's MMU V2 & Duet?:

You are in live drive, I looked at your Tipsmoothing.g
10s break anyway, it's just for testing, or is it really necessary?

probably not its just a value that definitely works, i was finding that if i retracted too quickly through the extruder it was mashing my tips and causing jams

gavatron3000 · 4 Feb 2019, 08:11

adding a cutter to the macros wouldnt be hard youd just need to add a fast selector move across the mmu that chops the tip off if thats what you want but again it'll just build up under the selector anyway. better off just tuning the ramming right

fma · 4 Feb 2019, 08:40

Quality of the tips also depends on the time the filament spents in the nozzle (without extruding). Especially with PLA. I have a simple settings which work great, unless the PLA is sitting in the nozzle for 2 or 3 minutes (in this case, I get oozing).

The solution is to pre-retract the filament at the end of a print.

Scachi · 4 Feb 2019, 09:17

Where do you buy 1.8mmx3mm ptfe tubing from ?
I can't find a source for that. A german shop would be nice but shipping to Germany is good enough

gavatron3000 · 4 Feb 2019, 09:22

theres a link in the document above

Scachi · 2 Apr 2019, 09:38

@gavatron3000 said in Multi color printing with Prusa's MMU V2 & Duet?:

theres a link in the document above

Thank you.

gavatron3000 · 5 Feb 2019, 05:24

@dc42 regarding triggers, are they meant to go off with immediate effect?

in my document above for loading the MMU2 they work and function as intended but it seems they are delayed until the tool change has completed. is this expected behaviour? id prefer being able to set it off immediately

dc42 · 5 Feb 2019, 06:12

The movement system is locked during a tool change, therefore if the trigger macro has any movement commands or other commands that affect motion, those commands will wait until the tool change is complete.

gavatron3000 · 5 Feb 2019, 06:45

The triggers in question are like this

M400
M291 "message and wait till ok is pressed"

Should I just remove the m400?

NicoLab28 · 5 Feb 2019, 13:33

@gavatron3000 said in Multi color printing with Prusa's MMU V2 & Duet?:

in my document above for loading the MMU2 they work and function as intended but it seems they are delayed until the tool change has completed. is this expected behaviour? id prefer being able to set it off immediately

You're saying that you have the same problem as me, (my post "M581 M582 M291, What am I doing wrong?") To know that the dialog comes at the end of the tool change.
Too late, because the script continued to execute, after the error, which should have been blocking.

gavatron3000 · 5 Feb 2019, 13:48

I'm going to try removing the V1 from the M291 as well as the M400 too. But I can't test this until tomorrow

dc42 · 5 Feb 2019, 16:28

M400 means wait until all queued motion has completed. So if you send it when a tool change is on progress, it will wait until it has completed.

gavatron3000 · 5 Feb 2019, 17:07

I'm hoping that if I remove the m400 and only have a M291 message within the trigger macro that it will pause the tool change if the condition is met.
I'll test shortly when I get a chance

gavatron3000 · 6 Feb 2019, 04:58

@dc42 said in Multi color printing with Prusa's MMU V2 & Duet?:

The movement system is locked during a tool change, therefore if the trigger macro has any movement commands or other commands that affect motion, those commands will wait until the tool change is complete.

ok so i removed all the movement commands and M400 from the trigger but to no avail. is it possible allow the triggers in the future to interrupt the tool change and pause when conditions arent met? and then resumed when prompted? that would make this MMU2 work perfectly then

Wyvern · 6 Feb 2019, 07:10

The MMU is interesting, but using Duet components are you not able to use purge blocks and such?

gavatron3000 · 6 Feb 2019, 07:57

Purge blocks and the like are generated by the slicer or post processing scripts

Wyvern · 6 Feb 2019, 18:57

Ah. Thanks.
Would be great for TPU printing as supports with TPU are useless- just use pla.

Computiger · 21 Jun 2019, 19:44

@gavatron3000 said in Multi color printing with Prusa's MMU V2 & Duet?:

https://docs.google.com/document/d/13r_6BTYTO-xlD6cQeNwOx4qeCEYYGrxOcHc0mC-tT8Q/edit?usp=drivesdk

Hmm...

I didn´t understand as I have to.
Can somebody tell me where I have to plug in the Pinda probe. For now I putted him to E0 Endstop, but I can´t home the selector (drive U).

In the description I have to plug him to V but

Here some details of config.g

; Endstops
M574 X1 Y1 S1 ; Set active high endstops
M574 U1 V1 W1 S3 ; Set additional axes as sensorless endstops
M574 Z1 S2 ; Set endstops controlled by probe

;Drives
M569 P4 S0 ; Drive 4 goes backwards V
M569 P5 S1 ; Drive 5 goes forwards U
M569 P6 S0 ; Drive 6 goes backwards W
M584 X0 Y1 Z2 E3 V4 U7 W6 ; Apply custom drive mapping

gavatron3000 · 27 Jun 2019, 13:33

@computiger said in Multi color printing with Prusa's MMU V2 & Duet?:

@gavatron3000 said in Multi color printing with Prusa's MMU V2 & Duet?:

https://docs.google.com/document/d/13r_6BTYTO-xlD6cQeNwOx4qeCEYYGrxOcHc0mC-tT8Q/edit?usp=drivesdk

Hmm...

I didn´t understand as I have to.
Can somebody tell me where I have to plug in the Pinda probe. For now I putted him to E0 Endstop, but I can´t home the selector (drive U).

In the description I have to plug him to V but

Here some details of config.g

; Endstops
M574 X1 Y1 S1 ; Set active high endstops
M574 U1 V1 W1 S3 ; Set additional axes as sensorless endstops
M574 Z1 S2 ; Set endstops controlled by probe

;Drives
M569 P4 S0 ; Drive 4 goes backwards V
M569 P5 S1 ; Drive 5 goes forwards U
M569 P6 S0 ; Drive 6 goes backwards W
M584 X0 Y1 Z2 E3 V4 U7 W6 ; Apply custom drive mapping

the pinda is used as the V axis endstop in certain situations during loading so it must be plugged into that axis endstop input. U axis uses sensorless homing