@pauledd You got it ! Same idiot issue. I put the board on the right pins and it works now.
Sometimes more than 2 eyes and a good reactive forum helps.
Thank you very much guys !

@Phaedrux said in Weird Laser Mode:

That's from the 2.03 release notes, which is the version you were running before, wasn't it?

Laser mode: for safety, the G1 S parameter is no longer sticky by default. You can make it sticky by adding parameter S1 to the M452 command.

From 2.04

In Laser mode, if sticky laser power mode is selected, the power set by the S parameter in a G1 command is remembered across G0 moves to the next G1 move

@pauledd said in Weird Laser Mode:

M452 C"!exp.heater3" R255 F1000 ; enable LASER mode

You're missing the S1 on your M452 command to enable laser mode.

https://duet3d.dozuki.com/Wiki/Gcode#Section_M452_Select_Laser_DeviceMode

https://duet3d.dozuki.com/Wiki/Gcode#Section_M3_Spindle_On_Clockwise_CNC_specific_Laser_on_Laser_specific

Thanks to your post my laser is now up and running on duet wifi rrf 3.1.1 .
Thank you very much

@kevinsant said in TTL 12V Laser:

@ACSlater you ever figure it out?

yes !
check this for the answer:
https://forum.duet3d.com/topic/22637/diode-laser-installation-on-duet-2-workbee-cnc

Hi all,
I use a duet 2 ethernet (RRF3.2) with an expansion breakboard.
1 X, 2 Y and 2 Z axis use integreted drivers (nema17)
and i added an A axis with an external driver on P5 (nema23).
It's the first time that i use external driver

Im'sure I'm doing something wrong in my config.g file but i dont know what
Here is my setup and my code is below:
My goal is to 3d print on wheels on this 4th axis.

config.g (partial)

; Configure Drives
M569 P0 S1 					; Drive 0 goes forwards
M569 P1 S0 					; Drive 1 goes forwards
M569 P2 S1 					; Drive 2 goes forwards
M569 P3 S0 					; Drive 3 goes forwards         
M569 P5 S0 R0 T2.5:2.5:5:5 		; A AXIS Drive 5 goes forwards (E2 on Expansion Header)
M584 X0 Y1:3 Z2				; Apply drive mapping to axes
M584 A5 R1 					;

; Configure Axes
M92 X400 Y400 Z400 A400 	; Set steps per mm
M350 X16 Y16 Z16 A64  I1 	; Configure microstepping
M566 X1000 Y800 Z1000 A1000 	; Set maximum instantaneous speed changes (mm/min)
M203 X4000 Y3000 Z2000 A2000 	; Set maximum speeds (mm/min)
M201 X150 Y150 Z150 A150	; Set accelerations (mm/s^2)
M906 X2400 Y2400 Z2400 A2030  I30 ; Set motor currents (mA)


; Configure Axis Limits
M208 X0 Y0 Z0 A0 S1		; Set axis minima
M208 X600 Y600 Z600 A360 S0 	; Set axis maxima

How to say that the A axis has no maxima ?
How can i know what to put exactly in M569 ?

M569 P5 S0 R0 T2.5:2.5:5:5

is this correct ?

I actually use this is my config.g for my laser diode to work and it works well :

M452 C"exp.heater3" F100 ; laser uses heater3 pin,  PWM frequency 100Hz

My questions are

• How to setup a second laser head in the same axis ?
• Do i need to setup tools for that purpose ?
• Can i set M452 2 times

The purpose is to send the same ttl signal through 2 outputs in order to "clone" an engraving job on 2 lasers in the same time
No need of an idex system, it's just a second laser head aside the 1st one

@o_lampe said in Galvo laser from sla printer on duet for engraving:

You could generate a single gcodefile for ten logos in a row

I agree but even with this approach the galvo working area is around 250x250mm with a relatively acceptable beam distortion. That means that i should move the gantry B axis each time the XY galvo finishes the single job.

I don't know whether a Macro or a WHILE DO END Loop would do the trick

I try now to get deeper in gcode tips and tricks and maybe someone here has already done that and will post some program example...

@alankilian Yes, should be ok I think.
Actualy the laser that comed with the kit i bought is dimensioned for a resin 3d printer not for etching wood or foam. So i need to test pwm/ttl my 20w laser diode on the galvo head to see if i can burn correctly

@alankilian

Yes i use the workbee for wood carving and aluminium with a spindle.

What I dont know is:
How to manage the gcode to repeat the same piece of code on another starting point.

I know that some cnc workers use like a subprogram with g54, g55, g56 origins for machining several same pieces on a vise for example.
But for me it should be kind of 100 different origins. I think that it's not the right way to manage this.

I was talking about kinematics thinking that the galvo XY axis could become AB axis and the gantry XY should work as usual XY axis.

@artichoke said in Galvo laser from sla printer on duet for engraving:

g0rg do you have some PCB or Electronic Skills?

Well, I know how to solder parts but i'm not an electronician. I'm more an IT adept

@alankilian said in Galvo laser from sla printer on duet for engraving:

@g0rg What do you want to do?

Attach the galvanometer head to your CNC machine and move it around above your foam so that the LASER can etch a logo into it 100 times?

This is exactly what i'm about.
I use lightburn software to get my gcode job.
In the software i have vectors or let's say a raster image that i can duplicate using the array grid function to have maybe 100 times the same job.
The galvo should etch 1 logo at a time and switch to the second position moving the gantry X and Y axis, restart the same galvo job , etc...

As @artichoke said, this is a kinematics stuff but i'm quite lost how to manage this

@kevinsant said in TTL 12V Laser:

@ACSlater you ever figure it out?

yes !
check this for the answer:
https://forum.duet3d.com/topic/22637/diode-laser-installation-on-duet-2-workbee-cnc

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

@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