Originally Posted by
Labmaster
TL and TH are input connections to the lasertube powersupply.
On one of both connections the lasertube powersupply gets its signal to switch the laser on/off
One of them activates the laser if the signal is high (voltage on), the other activates the laser if the signal is low (voltage is off)
One of both (what one depends on the controller that connectes to it) has to be connected to the laser controller (on/off) putput.
But I'am not quite sure if this could be your problem, as if so, the laser would not be switchable in general, so in your case it would fire as soon as the power is switched on.
If it is a hardware problem, then it could be the PWM input of the lasertube powersupply, so the controller is able to switch the laser on/off but is not able to controll the power.
The PWM is a connection from the controller to the powersupply, together with the (on/off) signal (TL or TH) it controls the lasertube. (one for on/off switch, the other for the laserpower)
Best regards,
Walter