Quote:
Originally Posted by Saturnine
Very much looking forward to seeing the finished product, the design is a bit more complicated than I envisaged, with the cutouts for fans and switches etc. How much stress was there in the plate from when it was rolled, that it would distort when skimmed, would have been frustrating to have to re-machine each side of the plate.
Do you still have to do the mirrors for it or are they done already.
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The stress is always there when I make one of these plates.
The plate starts off at 16mm thickness and I machine it down to 14mm in stages so that I end up with no more than 12 microns runout near the edge.
I have two secondary mirrors ready for polishing and I'm modifying an old Pyrex test plate to become the first primary.
Quote:
Originally Posted by Leo.G
Lovely machining work, CNC or the old fashioned way?
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The old fashioned way except for the CNC engraving.