Does anyone know a proven method to reset the focus after cleaning the lens. My method is trial and error and it can take me a few hours to perfect.
You should conduct a “Ramp Test”. Once you know the proper focus height you should cut out a piece of material that fits that focus that you need. That way you can slide it under the head and tighten manually. (I’m assuming you have a diode laser?) even with a CO2 this would work
The lens is the last in the chain, mirror 1, then mirror 2, then mirror 3 and finally your lens. So after cleaning the lens there shouldn’t be much in the way of adjustments to do.
What I would recommend is cutting yourself a Beam Checker from 3mm Acrylic, stick some masking tape over the 5-holes and use it over your nozzle, test pulse on low power and check that you beam is centred.
Beam Checker.lbrn (12.3 KB)
I think he’s got an LED. Don’t know if that will fit. It sure won’t on mine.
Oh yeah, of course, beam checker it not going to help with that
405 Nm variable focus Diode is 56mm.
Fixed focus 445 Nm diode is 30mm
That should get you where you need to be. Just cut a dowel to those lengths, position it beside the head, and tag it for future reference.
Perhaps @LaserWillie could expand on what a ‘ramp test’ is …
Great video, thanks! I’ll definitely be using this method and making a guid tool.