I want to use 3 Extruders

droftarts

@uneumann36 You can use a Duex5 (5 stepper outputs) or Duex2 (same PCB as Duex5, but only 2 stepper drivers are populated), but these are a PCB the same size as the Duet. See https://duet3d.dozuki.com/Wiki/Duex2_and_Duex5_Features

As you don't need extra heaters, endstops and other inputs and outputs, you could also use the Duet Expansion Breakout Board, which allows connection for 5 external steppers. https://duet3d.dozuki.com/Wiki/Duet_Expansion_Breakout_Board

But if you are relatively handy with electronics, you can connect an external stepper driver directly to the expansion port. See https://duet3d.dozuki.com/Wiki/Using_external_stepper_motor_drivers

Ian

engikeneer

@uneumann36 well to control the 3rd extruder you're going to need an additional driver. You're options are a Duex (2 or 5), or to use an external driver. I use three stepstick breakout boards with TMC2130s on to run my triple z axis. You get the step, dir & en signals from the 40pin header and just wire em up. Will certainly be smaller and cheaper than a Duex for what you need!

Some details on how to do it: https://duet3d.dozuki.com/Wiki/Using_external_stepper_motor_drivers

In hindsight though, I might have been better buying a Duex as it would have given me more room for expansion for my next printer upgrade

Depending on exactly how you want to run your hotend (mixing or independent), you might be able to do something with multiplexing the motors, but tbh that will probably be bigger, more expensive and general mess than just adding the extra driver...

dc42

@uneumann36 said in I want to use 3 Extruders:

I thought about another board from Duet, with the possibility of 3 extruders. But i need wifi conection.

In that case, one option is the Duet 3 Mini 5+ WiFi with the 2+ daughter board.

uneumann36

Hey Guys
Thank you very much for your reply.
It helps me a lot to understand how it works.

But next Question :
Does it make sense to use another Board who has enough point to connect extruders and so on?
Like Duet3 ??
I know there is no wifi applikation ? Right?
May i can bring a lan cable on it.?!

dc42

Duet 3 Mini WiFi provides 5 on board drivers and WiFi, like the Duet WiFi. But it also offers a low-cost 2-driver expansion using a daughter board, and CAN bus for further expansion.

Duet 3 MB6HC provides 6 on-board drivers and CAN expansion, but Ethernet not WiFi.

Both are more future-proof than the Duet WiFi because they have CAN expansion and more flash memory and RAM that the Duet WiFi

uneumann36

Hey, thank you for your fast reply.
I am also thinking a new board like Duet3 is the best solution.
Do you know if the Duet3 MB6HC has the same size like the duet2 wifi?
And is it possible to use my existing Panel that is now connect to my Duet2 wifi?

dc42

Duet 3 MB6HC is larger than Duet WiFi. Duet 3 Mini is the same size and has the same mounting hole positions, however the connectors are in different places. Both support PanelDue displays.

The MB6HC has more powerful stepper drivers than the Duet WiFi. The Mini has less powerful drivers. See https://duet3d.dozuki.com/Wiki/The_Duet_family_of_motion_control_electronics for a summary of the differences.

uneumann36

Hey, i am now at home and play with my Duet2 wifi and 3 in 1 out Hotend and extruders.

I connect 2 extruders to duet2 to see how it works.
In the moment i want only use 2 extruders.

1 Extruder is working fine.
I try to setup my config.
But i don´t see at DWC my second extruder so i can´t switch.

What do i wrong?

deckingman

@uneumann36 It's hard to say what you've done wrong unless you tell us what you've done. Suggest you post your configuration file, then one of us might be able to help.

Btw, if you only load filament into 2 of the 3 inputs, then things will get very messy because filament will be forced back out of the unused input.

dc42

@uneumann36 have you read https://duet3d.dozuki.com/Wiki/ConfiguringRepRapFirmwareCartesianPrinter#Section_Tool_definition_section ?

uneumann36

Thank you for your answers

So i am Not a Programming guy, so i do ist by learning by doing.

In this First step i will Try to keep this working
The Print Results are Not importent in the moment.

So do i Unterstand Right ? When conifg is right, i can Heat up the hotend, make on dwc for example extrude 100 mm filament at 2mm/ sek.
And on dwc i can swop from one to the other extruder by selecting tool???

uneumann36

Any feedback about my question?

jay_s_uk

@uneumann36 The answer is yes

uneumann36

Ok, thank you very much.
And sorry for the may stupid question from me.
But as i told you, the programming stuff is not my favorite,
and i have to learn a lot !

deckingman

@uneumann36 You asked the question "What have I done wrong?" How can anyone answer that when you won't tell us what you have done? I say again, post your configuration file, then we can see.

uneumann36

Hey all good!
I want to say thank you , all this information bring me forward.
ANd i will post my config when i am home

uneumann36

Hey Guys
I am back home and play with my printer and extruder.

Of course i am playing in the moment. I will try to heat up the hotend, und make hand extrusion via DWC from extruder 1 and after this extruder 2.

So i make a new config via config tool and bring it to printer.
Now i see 2 Tools , and Bed.
If i switch on tool on, both goes on. and also off when i switch on off.

How to test both extruders via DWC ?

Here my config , hope someone has an idea. :

; Configuration file for Duet WiFi (firmware version 3)
; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool v3.2.3 on Thu May 06 2021 17:04:43 GMT+0200 (Mitteleuropäische Sommerzeit)

; General preferences
G90 ; send absolute coordinates...
M83 ; ...but relative extruder moves
M550 P"ENDER 5 Duet" ; set printer name

; Network
M552 S1 ; enable network
M586 P0 S1 ; enable HTTP
M586 P1 S0 ; disable FTP
M586 P2 S0 ; disable Telnet

; Drives
M569 P0 S1 ; physical drive 0 goes forwards
M569 P1 S1 ; physical drive 1 goes forwards
M569 P2 S1 ; physical drive 2 goes forwards
M569 P3 S1 ; physical drive 3 goes forwards
M569 P4 S1 ; physical drive 4 goes forwards
M584 X0 Y1 Z2 E3:4 ; set drive mapping
M350 X16 Y16 Z16 E16:16 I1 ; configure microstepping with interpolation
M92 X80.00 Y80.00 Z400.00 E420.00:420.00 ; set steps per mm
M566 X900.00 Y900.00 Z60.00 E120.00:120.00 ; set maximum instantaneous speed changes (mm/min)
M203 X6000.00 Y6000.00 Z180.00 E1200.00:1200.00 ; set maximum speeds (mm/min)
M201 X500.00 Y500.00 Z20.00 E250.00:250.00 ; set accelerations (mm/s^2)
M906 X1200 Y1200 Z1200 E1500:1500 I30 ; set motor currents (mA) and motor idle factor in per cent
M84 S30 ; Set idle timeout

; Axis Limits
M208 X0 Y0 Z0 S1 ; set axis minima
M208 X220 Y220 Z300 S0 ; set axis maxima

; Endstops
M574 X1 S1 P"xstop" ; configure active-high endstop for low end on X via pin xstop
M574 Y1 S1 P"ystop" ; configure active-high endstop for low end on Y via pin ystop
M574 Z1 S2 ; configure Z-probe endstop for low end on Z

; Z-Probe
M950 S0 C"exp.heater7" ; create servo pin 0 for BLTouch
M558 P9 C"^zprobe.in" H5 F120 T6000 ; set Z probe type to bltouch and the dive height + speeds
G31 P500 X0 Y0 Z2.5 ; set Z probe trigger value, offset and trigger height
M557 X15:215 Y15:195 S20 ; define mesh grid

; Heaters
M308 S0 P"bedtemp" Y"thermistor" T100000 B4138 ; configure sensor 0 as thermistor on pin bedtemp
M950 H0 C"bedheat" T0 ; create bed heater output on bedheat and map it to sensor 0
M307 H0 B1 S1.00 ; enable bang-bang mode for the bed heater and set PWM limit
M140 H0 ; map heated bed to heater 0
M143 H0 S120 ; set temperature limit for heater 0 to 120C
M308 S1 P"e0temp" Y"thermistor" T100000 B4138 ; configure sensor 1 as thermistor on pin e0temp
M950 H1 C"e0heat" T1 ; create nozzle heater output on e0heat and map it to sensor 1
M307 H1 B0 S1.00 ; disable bang-bang mode for heater and set PWM limit
M143 H1 S280 ; set temperature limit for heater 1 to 280C

; Fans
M950 F0 C"fan0" Q500 ; create fan 0 on pin fan0 and set its frequency
M106 P0 S0 H-1 ; set fan 0 value. Thermostatic control is turned off
M950 F1 C"fan1" Q500 ; create fan 1 on pin fan1 and set its frequency
M106 P1 S1 H1 T45 ; set fan 1 value. Thermostatic control is turned on

; Tools
M563 P0 D0 H1 F0 ; define tool 0
G10 P0 X0 Y0 Z0 ; set tool 0 axis offsets
G10 P0 R0 S0 ; set initial tool 0 active and standby temperatures to 0C
M563 P1 D1 H1 F0 ; define tool 1
G10 P1 X0 Y0 Z0 ; set tool 1 axis offsets
G10 P1 R0 S0 ; set initial tool 1 active and standby temperatures to 0C

; Custom settings are not defined

uneumann36

Hi Guys

At least i get my THC-01 working.
But i am not really happy how it works.

Also i do not know how to slice a object.

May somebody has experiance with this hot end.

And a question from my side:
Is it possible to change the extruder while printing with no fail?
So that extruder 0 pull back filament 30mm and extruder 1 push filament 30mm and continue printing?
How can this work?

Regards
Uwe

engikeneer

@uneumann36 Yes you can do it, but you need to set a few things up. FYI I don't have a hotend like yours, but I do use a multi-tool printer (E3D chimera) - will try and make it relevant for yours.

Step 1 - you need to define the tool change macros that get executed when you switch between Tool 0 & Tool 1. You'll find information on these here:
https://duet3d.dozuki.com/Wiki/ConfiguringRepRapFirmwareCartesianPrinter#Section_Tool_change_files

You can set up most of this in the slicer, but I find it more intuitive to put in the printer itself.

I think in tfree0.g & tfree1.g you'll add the retract 30mm (though the amazon product description I read says 45mm!). e.g.

G1 E-30 F300 ; retract 30mm @ 300mm/min

I think in tpre0.g & tpre1.g you could put the movement command as the docs suggest, or leave blank

Then in tpost0.g & tpost1.g, you would de-retract the 30mm (or 45mm!). e.g.

G1 E30 F300 ; deretract 30mm @ 300mm/min

In your slicer (I use PrusaSlicer), you will need to setup your printer as a multi-tool (or multi-extruder) printer. That then should open up the settings you need.

In PrusaSlicer, you can import a pair of STLs (one for either tool) and it will allow you to select the tool for either one. It will then put the 'T0' and 'T1' commands in the correct places to switch tool through the print.

You will want to play around with a few of the settings in your slicer (e.g. maybe using a prime tower). You may also need to tweak the tool change macros a bit (e.g. faster/slower retract/unretract, change the distance etc).

It can all be a bit complicated and will take quite a bit of tuning to get it right, but you'll get there

uneumann36

@engikeneer
Thank your very much for your feedback.

Unfortunatly i have not big experiance in programing stuff.
Let me say, in the moment i just can swim a bit.

Could you explain me how to do this, what is the exact code for this, and how and where to put it in?

I am sorry for my stupid question.