Duet3D wifi for 3D printing and laser cutting/engraving

Satosek

Hi guys,
I'm new in this area. My plan is to make 3D printer with possibility to swap with 3W laser.
First step is to choose the board. Is tere possible to use duet Wifi for this.
Idea is to have mounting head on Z axi. On this mount you can put printing extruder or laser. Change electrical cabel and start to work.
Is there nay idea if this is possible to do.

Jacotheron

Yes, it is possible and there is somewhat of a guide: https://duet3d.dozuki.com/Wiki/Laser_PWM_control

That extra board mentioned on the page is important in that it prevents accidental firing of the laser.

I plan to also add a laser module (though a 15W) on my CNC powered by DuetWifi with an extra safety feature: enclosure closed switch. This will be added as a micro switch, placed in a strategic location. I still need to figure out exactly where to wire it up with the Quad NOR Gate. This will ensure that the laser can only fire if:

The board have stable 3.3V (not shorted; input on the 1A and 1B pin results in LOW for 1Y).
The enclosure is closed,
The Duet is actively pulling the Heater Pin LOW

With any laser, please ensure you follow the recommendations for safe operation - the refection of a laser beam on a mat surface can be dangerous to your eyes.

Satosek

Thanks Jacotheron. This is good news and tip, it will be great help to continue with this.

keyz182

@jacotheron One suggestion might be to hook the enclosure switch up not to the PWM, but to the power line, so even if the IC and Laser control board somehow fail on, if the enclosure is open, there's no chance of a shining laser at all.

keyz182

Also, if anyone in the UK wants one of those boards mentioned on the wiki, I've got 9 of them spare - JLBPCB had 10 for $2 if ordering through EasyEDA, so I ordered extra components too.
I can send them assembled or unassembled (none are assembled currently).

smoothquark

@keyz182 said in Duet3D wifi for 3D printing and laser cutting/engraving:

Also, if anyone in the UK wants one of those boards mentioned on the wiki, I've got 9 of them spare - JLBPCB had 10 for $2 if ordering through EasyEDA, so I ordered extra components too.
I can send them assembled or unassembled (none are assembled currently).

Hi! I have just registered on this forum, and yes, I would like an assembled board please.

noisettetbou

Hi. I'm from France and I can't buy the boards on EasyEDA (unavailable components). Have you got yet a board to sell ?
Mickael

@noisettetbou said in Duet3D wifi for 3D printing and laser cutting/engraving:

Hi. I'm from France and I can't buy the boards on EasyEDA (unavailable components). Have you got yet a board to sell ?
Mickael

This thread is old but you should be able to select replacement components? Can probably use LCSC Part # C6765 for the main IC; didn't check the rest.

noisettetbou

@bearer OK for C6765 but almost all the component are unavaibles and i'm totally noob in PCB design

@noisettetbou said in Duet3D wifi for 3D printing and laser cutting/engraving:

@bearer OK for C6765 but almost all the component are unavaibles and i'm totally noob in PCB design

Seems fine here; the 0603 cap is not recommended for new design but 19k in stock. The three through hole headers you'll have to assemble yourself anyway but are in stock when I checked.

keyz182

@noisettetbou
Looks like the BOM was wrong on the project, updated it now to remove the unnecessary components, and all seem to be in stock.

smoothquark

@smoothquark Sorry for resurrecting this old thread. I bought a board from @keyz182 (thank you very much) but never got around to using it. I had been too busy with other things and left aside my Ox CNC and any thoughts of a laser attachment until recently. Getting back to it now, but I cannot remember how to connect the board. Do I just plug in the header to the expansion pins and ignore CN2 or do I have to use a separate 5V for the V_IN/GND on CN2? Also, my duet runs on 24V V_IN with 2 24V fans always on. So, I suppose the PWN Fans and Heater3 would be on 24V? Will this be a problem?
Thank you and apologies once again.

keyz182

@smoothquark V_IN on CN1 is just a direct connection to V_IN on CN2. My laser had 3 inputs, +V, PWM, GND. I added the V_IN passthrough so that I could just plug the three connections into one header, then pull in the 12v I need from elsewhere and just wire it to V_IN on CN2.

This shows what's going on - https://duet3d.dozuki.com/Wiki/Laser_PWM_control#Section_Preparation

Note - I haven't touched this since 2018, so I'm a little rusty

smoothquark

@keyz182 Thank you. I am clearly very much a newbie in this! I think I understand it now. Assuming I am reading everything and looking at the diagram correctly...

the H1 Duet Header on the board plugs in to the matching pins on the expansion port on the duet3d.
The board does not require a V_IN as there is 5V from Pin 1 on the H1 header.
PWM from CN1 goes to the laser driver (thinking of a NEJE https://neje.shop/collections/laser-module/products/neje-a40630-laser-engraver-cutter-module-kits-fac-7-5w-output) and there will be nothing on Pin 1 V_IN in CN1
The NEJE laser would be powered by the 12V power supply that comes with the laser.

It will probably be a few weeks before the NEJE arrives. So, fingers crossed!

keyz182

@smoothquark If that module has +12, PWM, and GND, then yes. PWM (and GND) from CN1 to the module, then 12v from wherever (GND too - make sure GND from the supply and duet are linked, otherwise PWM would have no reference).

You can also plug in the 12v power to CN2, that just means you module only needs to be wired to one place - CN1, rather than PWM + GND going there, 12v going elsewhere, and splitting GND to bridge duet + PSU. V_IN goes from CN2 to CN1 but isn't connected to Duet, just a passthrough.

Electrically, there's no difference, just a matter of convenience.

smoothquark

@keyz182 Thank you