RESOLVED:
Don, Happy Easter!!! And the laser cutter is now fixed. It was a grounding issue. I would love to take credit for solving it, but my buddy Scorch_works and I worked through your tests and he determined it wasn’t properly grounding.
The issue: Grounding (How did I test for this.)
Using the voltage meter Red Positive Tester (+) to LSU GRND. (-) to Metal Laser Housing Result = .00
Using the voltage meter testing (+) to DC Power Supply GRND. (-) to Metal Laser Housing Result = .95
The (LSU) Laser Power supply was not getting a good ground and gave a read out of .00. I powered off the laser, unplugged it. Then connected a scrap wire from LSU Grnd to DC Power Supply Grnd. Plugged it in, powered it on. The laser now Cuts, Engraves with zero issues, just like brand new. 100% functional again. All jobs fire the laser correctly now.
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. But you may run into what I did and find a Power supply not getting a good ground. Which is kinda crazy because the 220v outlet has a 3 prong with ground so you would have thought it gets a ground there. Again if your having it test fire perfectly but wont fire on jobs. Test the Grnd on both power supplys to the metal housing case and you should get a read out of .95. If not, you dont have a ground to that power supply.
Don… Being its solved… There is little point in rattling off voltages of all the pins. But you may stumble over them in the future and this may be helpful for someone else. These are the readings before the system was properly grounded and fixed.
Voltage meter on “L” wire to Grd while cutting - 4.0 then 4.03 then 4.0
Voltage meter on “L” wire to Grd while engraving - 4.04 then 4.02 then 4.0
Voltage meter on “L” wire to Grd while (NO TEST NO CUTTING - IDLE) - 4.0 exactly
Voltage meter (+) on LPS “G” the (-) on DC Power Supply Grnd - .95
TESTING THE CONTROLLER BOARD
Unplugged Black “L” Wire (Separated the white wire that goes to the Panel)
Voltage meter (+) on LPS Black Wire unplugged from “L” that came from (LO) to (-) LSU GRND = 2.44
Voltage meter (+) on LPS Black Wire unplugged from “L” that came from (LO) to (-) DC Power Supply GRND = 4.84
WHILE RUNNING A JOB THAT WOULD BE CUTTING
Voltage meter (+) on LPS Black Wire only that goes to “L” from (LO) to (-) DC Power Supply GRND = 4.92 then .03 then it would move the laser head and 4.92 and then act like its cutting and go back to .03
It was determined that the Controller board was correctly working at this point.
Then it was determined it was a Grnd issue at this point: (Note I had to scratch off the paint to do this test. You have to hit bare metal on your laser case to ground)
Voltage meter on LSU GRND to Bare Metal laser housing while running a cutting job = .00
Voltage meter on DC POWER SUPPLY GRND to Bare Metal laser housing while running a cutting job = .95
At that point it was determined both grounds were not equal and both be .95 and LSU was not grounding. So a wire was connected from LSU Grnd to DC power supply Grnd. Then everything worked.
Don, I want to thank you for you weeks of work and patience. Man I greatly appreciate it and would like to donate money to your beer fund. Just let me know how I can do that. Paypal, Patreon, Raking Leaves, washing cars… I attend a lot of wood working conventions and get together’s and would like to shake your hand one day… or maybe foot bump since we cant do that any more. lol Be safe and thank you. I hope you have a wonderful easter and I hope this was a good egg to find. And straight up thanks to Scorch_Works… That dude helps a lot of people on here as well. Thank you both for helping get my company get back on its feet and i am for sure indebted to you both. Thanks -Brian