Devil-67

I have the firmware 2.08 H35 And the Y axis moves in the opposite direction in Lightburn, in LightBurn when Y+ is pressed it moves to Y-. No matter how...

Right, it's the same with me

Axis control and laser controller are switched on. GND of the two power supplies are not connected to each other. Both are earthed Mean to connect GND of both power...

Connecting GND from both power supplies did not solve the problem. Nothing has changed. Even if I remove GND from the TTL cable which is used to control the laser,...

Here is a video to help you understand what I mean and where the problem is. https://user-images.githubusercontent.com/31169133/154863149-84117979-551b-4fa9-874a-8911eb733d2c.mp4

Now I have just measured the voltage at the TTL signal at S1000 and it comes out 8.6V shouldn't it be 12V ? Can I also use the spindle power...

The instructions from the Neje say: 

> @Devil-67 Are the GND of MKS motherboard and GND of laser board connected properly?  Try connecting the picture link to see if it works Yes GND is connected...

So far I have not been able to find anything to change the problem, it is always the same, when the X / Y axes are moved the laser keeps...

the MKS and the Neje have their own power supply, GND is necessarily connected to the MKS board for TTL. How do you mean disconnect