Diode laser installation on duet 2 workbee cnc

Beickybeer

Hi folks,

I have bought a diode laser to upgrade my workbee cnc machine with more functionality (I have an eleksmaker too but it's too small and not stable)
Already invested a lot into the machines of my woodworking workshop, I def want a opt laser but it's too expensive for now!

I have bought this laser: http://voidmicro.com/Products/Laser/LD3070LA-en.html?page=page_laser
5.5W diode laser.
It has a 3 pin cable: (yellow) PWM-TTL 3.3v-12v / (black) GROUND / (red) voltage input 9V- 15 V

I am totally lost now, too much/different info available..
I have read different topics on the duet forum, i have searched how the opt laser is connected to the duet and also asked the workbee facebook group for help but I'm not getting any wiser!
Links I've already read:
https://forum.duet3d.com/topic/17278/neje-like-laser-as-cnc-upgrade?fbclid=IwAR123N_hwk74q808p7SDluPqOgeKdP7viGCEymC9OwJf8NcrcrEvnk2VP3w

https://forum.duet3d.com/topic/18440/duet-laser-software/5?_=1617965482930

https://codingblog.galcomp.net/2020/08/15/adding-a-relay-to-a-duet-2-to-switch-on-a-router-via-gcode/?fbclid=IwAR3rK3zi1dOZJUkxrilIShqXMcxf3V2r9skwKnLHsYPwsdj_b8E_TDZYk4Q

Can someone help me out and explain in a simple way (I'm not good with electronics) how to connect it to my duet 2 ethernet board? Atm I use 24V on the duet and fan outputs.

Do I need step down buck converter 24V-12V for the voltage of the laser? Or an optocoupler as protection? Or a pull down resistor for current flowing back to the duet board?
Or is the simplest way buying a duex 5 extension board and use that to control the laser?
Or changing to a diode laser with control board like the neje ones that are supplied with an external 12V power supply?
I really don't want to destroy my duet ofcourse

The software I want to use is Lightburn, which I already found how to create Gcode ( based on this one https://codingblog.galcomp.net/2021/01/04/optlaser-duet2-and-lightburn-setup/ ), I may need to change a few settings I suppose....

I hope I can get a bit wiser by you! Thanks a lot!

Christophe

PS: this is my cnc setup:

Ooznest workbee 1500*1000, AMB Kress spindle 1050FME-P DI digitally controlled with PWM converter. The digital control I found out myself and wrote a manual for it on the ooznest learn portal to help others

Beickybeer

Or can I install it like this?

g0rg

@beickybeer
You need a small board that inverts the signal
https://forum.duet3d.com/topic/19842/weird-laser-mode/28?_=1618486087095
I actualy get my laser wired on heater3 and i use rrf3 on my duet2 wifi

I was able to order that board online , i need to double check to find out the link and i'll post it here

chimaeragh

@g0rg Did you order a fully assembled board or just the components and assembled yourself?

g0rg

@chimaeragh
Just the boards and the components on the same website and i soldered the comps afterward.
I should buy 5 pieces minimum but for for a very cheap price

chimaeragh

@g0rg Okay, thanks. Can you provide the link?

g0rg

@chimaeragh
https://easyeda.com/keyz182/laserpwmduet
click on open in editor.
from that editor you can purchase the board and components

chimaeragh

@g0rg Seems some of the components are discontinued or out of stock

dc42

If you mean the LTV-814H, Digikey is showing no stock, but Mouser has some, and so does RS.

chimaeragh

@dc42 Actually, I was trying to have the board on your wiki built and assembled for me.
https://duet3d.dozuki.com/Wiki/Laser_PWM_control
https://easyeda.com/keyz182/laserpwmduet
The 74HCT02D,653 is out of stock on jlcpcb.com so have I to explore other options

dc42

@chimaeragh said in Diode laser installation on duet 2 workbee cnc:

The 74HCT02D,653 is out of stock on jlpcb.com so have I to explore other options

Any other 74HCT02 in SOIC-14 package should do.

chimaeragh

@dc42 Thanks