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Wow! Thank you for all of the information! We have also considered the chiller pulling juice from the laser tube. We ran each of them on separate 220 circuits. No luck. I will look into how the...

When the laser fires, it creates a white dot. When the dots are packed closely together, it creates a whiter area. Think of half-tone printing except in reverse. Otherwise I think you understand the...

I engrave on Black Granite. I have tried setting my chiller to about every number in between 20 and 15 with a +/- 1 degree Celcius tolerance.

So I have been through the wringer with this JQ-60-1390 laser (60 as in 60 watts) I have replaced the bulb, power supply, pulleys, belts, and lenses. I have aligned and realigned, calibrated,...