Hi all-
I apologize for resurrecting this age old issue, but, I'm hoping for some help. We are getting 'swirls' on most of our poly lenses. They are indiscriminate when it comes to power/cyl and is very inconsistent in regards to location/pattern.
- Genterator:2G Turbo with a fine surface finish (spiral sep 0.63 mm.) The curves and axis have been calibrated and re-calibrated. The motor and blade are relatively new.
- Finer and Polisher: Both are Acuity Plus. The finer is using tap water at a fairly consistent 58 F. Polisher is using Plasti-sheen 2020 chilled to 53 F. Polish is changed every 3 or 4 days depending on volume. Machines have been calibrated for axis and center.
- Pads: First fine is a P280 (black) @ 17 psi for 1:30, Second fine is a P1000 (brown) @ 17 psi for 1:45. Polishing is with a pink pad @ 20 psi for 6:00
We've also changed pins and centers in our blocks. All generator marks are being removed in first fine. Im not sure if the first or second fine are causing the issue and they aren't polishing out? We had this same issue 3 or 4 months ago and after changing out a few expensive parts in the finer and polisher it was determined our fining pads were too aggressive and thus the P280 and 1000. This time it seems like it is coming out of nowhere. I should note that the swirls are very very faint but become more visible after backside coating. They don't seem to be showing up in any sort of consistent pattern (as if to indicate and axis or curve issue.) I've run out of ideas here and am hoping for some direction on where to go next. Thanks for your time!
-Bill
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