Not quite a mod, more just misuse…
Has anyone tried flame polishing with the laser?
I’m trying to apply a repeatable flame polish to a laser etched microlens array.
I’ve had mixed success by moving the bed to the bottom of travel (Blacknose A3) so the laser is ~1inch diameter. At power 100, speed 8 it creates a mostly good finish but leaves some bubbles (these may be moisture in the plastic - I’ve been using scrap).
I get a really good finish if I slow the laser to speed 5, which results in a small controlled fire that follows the laser path (doesn’t stay lit after the laser moves on), but it feels wrong to have a fire going on in there!
The flame is the width of the laser ~1 inch diameter and ~3 inches high, and candle like (i.e. yellow and slightly sooty) (not to be confused with Sweep’s friend who is yellow and totally Sooty
I do have extraction and air blower, and the fire remains small and is located at the bottom because the workpiece is low to defocus, am I still likely to goose the mirrors, etc?
I just thought I’d ask to see:
a) has anyone had success flame polishing with the laser?
b) has anyone got experience of ‘accepting’ small controlled fires in the laser cutter?