Laser Machine With two laser heads

hello
i have problem with laser machine with two heads.
i use LaserCut5.3 , controller card : Leetro MPC6515, Two power supply 80 W, Two laser tube 80W.
when for example, i put power 10% or 90% in software, and start cutting, the 1^st head cut normally according to the value 10% or 90%; but the 2^nd head stay cutting always at same power (17mA) , even when I put 0%.
I noticed that the IN wire of 1^st power supply is connected to pin2 (Analog Output) on Y2, but the IN wire of 2^nd power is connected to pin3 (Laser Power) on Y2. see Pin Array on Table.
why the connection of the two wires (IN) is different, 1st on Analog Power, the 2^nd on Laser Power???
I don’t know where is the problem.
See pic.
Can anyone help me.
Thank you.

I wouldn’t assume the wiring is wrong.
Those four signals are typical for a laser power supply. You have one Y2 connector that somehow goes to both power supplies. One works ok and the other does not. I would suspect the issue lies between the connector and Power supplies or in the one PS.
You could check the signals
1). Ground.
2). PWM but should be between 0 and 5
3). 5 volts
4). Zero to 5 to control the laser on off.


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Hi
Thanks for your answer,
I found other laser machine, with same controller card mpc 6515c, but for only one head and one laser tube, i found the pin3 not connected.
See pic.
What you think?
Thanks