K40 Laser cutter wont fire on jobs. Still fires on panel/psu test.. Gives Message "L" - No Laser Signal

[mcdanlj (Michael K Johnson)]

Thanks @Scorch!

@WoodenCreationz

Things to note… for people in the future having the same issue and reading this. I did use a dremel to grind off all the paint on the inside Metal Laser Housing Grnd terminal (screw) which is located in the back of the Laser cutter. I also made sure the ground wire had a solid metal connection to that bare metal. With that said… I had read laser cutters having grounding issues on past forums thus why I tried this.

FWIW, That’s one of the recommendations in this introductory article by @keen — scroll down to the diagram showing how he re-worked his ground:

Laser safety: Light and Electricity

@keen

However, that ground terminal is often insulated from the chassis by plastic washers and/or paint, making it misleadingly dangerous.

The picture below is how I reworked the ground lug inside my K40.

Lots of gold in those articles.