Connecting Laser to Duex5

smoki3

Hi,

I have problems to controll my laser.

Ich tried to connected the laser VIN to my e4 heater pin on the duex5 and the pwm pin to the e6 pin.

No matter what I do the laser is always full power.
As far I understand this is due to the switched ground instead of switch VIN.

I now read that the pwm pins on the duet5x have a switched positive pin. But my laser also consume some current from the ttl pin. So I think the pwm pins on the duex5 are not tolerant to this.

So how can I handle this?

Phaedrux

Can you provide some more details on the laser module?
Firmware version? config?

smoki3

@Phaedrux

This is my controller:

I use RRF3 and no special config applied. You control the GPIO pins