Laser Output

[Macwolf]

@jay_s_uk
M452 C"! Laser" R255 Q500;
no change. or how to use the negative output

[jay_s_uk]

@Macwolf try wiring the laser fire pin to the negative of out0, 1 or 2 and change your config accordingly.
you can see more detailed wiring for the K40 here https://github.com/TeamGloomy/LPC-STM32-RRFUserConfigs/tree/master/K40 CO2 Laser - SKR 2 - ESP - paulg4h to see if that marries up with your machine

[Macwolf]

@jay_s_uk
A technical question: How much frequency does a 40W CO2 laser tube need? In your example, is the Q value 5000? Or does that not matter.
I am new to this area and am wondering whether I am implementing it technically correctly. There were no operating instructions included, neither with the power supply nor with the tube.

Markus

[jay_s_uk]

@Macwolf IIRC, the 5KHz came from previously available information from when people were converting the K40 away from the original controller to boards that use GRBL etc

[Macwolf]

@jay_s_uk
Out 1 is now the output for the laser, it doesn't deliver a negative signal, does it?

further connections are needed.

1. 5V for TH

2. ground

3. I simulate the cooling.

where exactly should I connect these cables to the power supply terminal

[dc42]

@Macwolf said in Laser Output:

Out 1 is now the output for the laser, it doesn't deliver a negative signal, does it?

OUT1 is an open-drain output, suitable for connecting to an active low input with internal pullup on the laser module.

The output on the VFD/Laser connector is active high, suitable for connecting to an active high input on the laser module. It should be low when the Duet is powered on. However, when no power is supplied to the Duet you may find that it floats high enough to trigger the laser. if that happens then try connecting a 1K pulldown resistor between the output and ground.

What type of control input does your laser module have?

[Macwolf]

@dc42 my power supply is from the same manufacturer as the tube I have a diagram, but the description is in German

[jay_s_uk]

@Macwolf thats the same as PSU type 1 shown in the wiring diagram on the page I linked you to earlier (https://github.com/TeamGloomy/LPC-STM32-RRFUserConfigs/tree/master/K40 CO2 Laser - SKR 2 - ESP - paulg4h) so it would be wired in the same way i.e. to heater ground

[Macwolf]

@jay_s_uk yes that's true, but there is no line from the contacts to the board and I don't want to try until it works

[jay_s_uk]

@Macwolf to the "L" connection like the PSU type 2

[Macwolf]

@jay_s_uk and the others there are more connections like 5v, p+ gnd ......where are these connected to the duet board?

[jay_s_uk]

@Macwolf which others are you talking about?

[Macwolf]

@jay_s_uk

[jay_s_uk]

@Macwolf do you see those connected anywhere on the PSU type 2 to the SKR2 board?

[Macwolf]

@jay_s_uk no only these control the tube

[jay_s_uk]

@Macwolf ok then. so you just need to connect the "L" connection to the duet. You will need to connect a ground connection, like on PSU type 2, to your power supply powering your duet