Laser on E1 dont work

mickey30m

can i get the ttl signal from the duet board? how do i wire that?

mickey30m

i lost now with all the different info on the internet....

the board works, i wiring now the power from external power source.
than the laser connector is to the laser connector on the bvoard.

and than i have the ttl connector wired to the E1 port. is this good?
than in config i have this
; only for the laser
M307 H2 A-1 C-1 D-1 ; disable heater 2

; Fans
M106 P0 S0.3 I0 F500 H-1 ; Set fan 0 value, PWM signal inversion and frequency. Thermostatic control is turned off

; laser
;M307 H2 A-1 C-1 D-1 ; disable heater 2 to make it available as a general purpose output pin
M452 P2 R255 F200

do i need to do more, make a tool or something in dwc?

dc42

The TTL input should be wired to just the E1- pin of the E1 heater output. Caution: on older Duets the E1- pin is labelled incorrectly. It's the pin that is nearest to the motor connectors, not the one nearest to the corner of the PCB. If you get the wrong one, you will feed VIN into the laser TTL input, which may damage it.

You may need to connect a pullup resistor between E1-/LaserTTL and +5V. A value in the range 1K to 10K would do.

mickey30m

This post is deleted!

dc42

If the TTL input has 2 wires, one of them will be ground. Connect that one to Duet ground.

mickey30m

This post is deleted!

mickey30m

Thanks @dc42

okayyyyy

i get it to work, but as seen in the video he dont put the laser on and off.

but i dont know if this because the board, or something in a code.

a little more help please

when i send M3 S100 i get about 8v and when i send M3 S255 i get 12v. on the ttl port.
but the volt on the laser port dont change.

( do i need the control board? because i get on the ttl cable (E2) 0 to 12v )
when i connect it direct on the duet, can this go bad?

https://photos.app.goo.gl/NJcdPmcKV7URitX79

dc42

Please post a photo showing how you have connected the laser control module to the Duet and the power supply.

mickey30m

I put now the laser direct on the E1 port and everything works perfect.

Can i damage the board with IT. ?

dc42

If you mean that you have connected the latser module power input directly to the E1 heater output, I don't recommend that. The laser module may not like having PWM applied to its power input.