Laser won't turn off

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Joined: Sat Mar 18, 2017 8:22 am

Laser won't turn off

Postby photozz » Sun Apr 30, 2017 4:36 pm

Hi guys,

I need a little help with a somewhat dangerous situation. have a cheapie Chinese laser and I finally decided to upgrade. I ordered the Element E5 DSP Upgrade Kit for D/K40 Small CO2 Laser Machine which includes the DSP Laser Controller Card Element-5 E5. I also ordered and am using the 20W~45W PWM CO2 Laser Power Supply (AC110V).

I have it all wired up per this diagram viewtopic.php?f=16&t=3313

I have the water protect bypassed at the moment, I'll get a sensor for that shortly.

When I fire the laser from the button on the panel, it does not pulse, it turns on and won't shut off until I hit the reset on the panel or turn off the power. It does the same thing if I fire it through the software as well. If I start a cut, the laser remains on the entire time, causing cut lines where they should not be. If I leave the main power on, but do a reset (reboot?) on the controller, the laser shuts off.

Any idea where I should start? I checked the wiring between the controller and the laser power supply, I'm somewhat out of ideas.

Posts: 4388
Joined: Mon Jun 15, 2009 3:00 pm

Re: Laser won't turn off

Postby Tech_Marco » Mon May 01, 2017 12:20 pm

Check the "TH" and "TL" connection see if reversed.
Then, check TTL and PWM connection if reversed.
Check the firing mode on LaserCad, Positive or Negative. If you're connecting TL to ground, choose 'Negative'. Otherwise, choose Positive.


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