DAPPH
as dyslexik as I'm daft
- Messages
- 7,489
- Location
- Near to Cross Hands Llanelli SouthWales GB
Nice acquisitionEasy enough to make another lens.
I drilled a square of uv resistant clear plastic at each corner put double sided sticky tape on one side and carefully screwed & stuck it to a bit of thick ply to which I'd put a sunken coach bolt in the middle with a flat washer & six nuts on the other side, tightened the first nut up a bot so it gripped well in the ply & slipped it in the lathe and turned out a very accurate lens using a fine thread cutting tool at almost 90 degrees to the chuck . It was so good I used the same principle to make another three lenses .
Getting the double sided sticky tape off the completed lens was a tad awkward till I warmed it up in hand hot water , then managed to roll off much of the tape then carefully rubbed the remainder off with a bit of old soft towel well wetted with WD40 .
I tried to make it without using the double sided sticky tape idea and at the point of break through the lens caught up on the cutting tool and developed a large crack .