- Attendees: BlakeS, Fletcher, NickB
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- LC1290 Big Red
- LG500 Little Red
- Cutting slowly: 4mm/s with 3mm MDF
- Pristine condition with new tube >24mm/sec
- Focus is bad
- Blemish on partially silvered tube end
- Chengdu Weegiant 60W CO2 laser tube, expected 2000h lifespan, lasted 5+ years - better than any of the 100W+ tubes!
- New, improved (co-linear red targetting diode?) replacement about $500 delivered?
- Using new lens "USA ZnSe Focusing Lens 50.8mm" - this is the $25 one
- Was about 7mm/s for 3mm MDF when installed
- Removed and looked reasonably clean
- Trying "China ZnSe 63.5mm"
- Tried the "China ZnSe 50.8"
- Different height on focus target
- Focus still poor
- Loose nozzle-securing screw: stripped, replace&re-tap?