Field Notes
Real specs, honest verdicts. Color-marking experiments, software gotchas, and the unglamorous lessons learned running fiber lasers in a real shop.
Focus drift, fading marks, EZCAD ghosts, a galvo speed cliff, and the lens scuff that cost me a Sunday. Every problem I have actually hit, with the fix.
A local brewery ordered 200 color-logo tumblers. I quoted, ran them on the 30W MOPA, and tracked every minute. Here are the numbers, the fail rate, and what I'll change next time.
Vivid blues, golds, and reds on stainless are repeatable on a 30W JPT MOPA. Here's the exact pulse-width / frequency / speed grid I run, and the four mistakes that wasted my first weekend.
Same wattage, same price bracket, completely different machines. I've spent real time on both. If you're choosing between them, the right answer depends on one question.
I've had the ComMarker B4 30W on the bench since mid-October. Here's what it actually does well, where I got bit, and the one spec sheet number I wish I'd caught.