Is there a test button on the laser tube power supply? You can test the laser output by using the test button. This will help you determine if the laser tube is bad, or if you have wiring issues. Sometimes, wiring to he TL may not work as some controllers are set to active low, so you may need to wire the controller to TH instead.
Additionally, the mA on the high tension line does not have any relationship to the digital trigger signal from the controller to the power supply.
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Using the AWC708, my laser will not fire. The wiring seems correct