LaserUser.com Forum (formerly RDWorksLab)

Gene Uselman wrote: Fri Jan 22, 2021 Thank you- I actually use Fusion 360 for design- I should be able to modify it with Meshmixer to get the shorter extensions that I am thinking of. I find that getting the nozzle closer to the material you are cutting works way better.

I have solidworks if it becomes necessary.

Philipp Pap wrote: Fri Jan 22, 2021 Is it ok to make a focus extender with a 3d printer with petg? I don't know how hot the lens gets, but with 3% power costing at 50Watt 1,5Watt would get converted to heat, but there is an air assist cooling, what do you think? (The lenses will arrive in a month)
IMG_20210122_103704.jpg

I've used PETG for high pressure cones for a while. The only caveats are:
1. DO NOT let the beam hit the metal tip. It will heat up and melt the cone and disaster will ensue.
2. You might try plugging the output with your finger and see if the material walls are leaky. Sometimes 3D prints are not air-tight and air permeates through the walls. If that happens, a coating of spray paint will usually take care of it.