Hello All: I e-mailed this yesterday but I see that the atm list never got it, but someone in England did, along with a spam message attached to it.. Hopefully this one will get through. Dan Kahraman
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- To: atm@shore.net
- Subject: Side with tool at 0.70r zone
- From: Daniel Kahraman <ishtar66@speedline.ca>
- Date: Sun, 27 Feb 2000 12:45:15 +0000
Hello All: The machine works very well. With the 24" dia. tool centred on the mirror, and with the pin on the r=17" on the eccentric plate I have a 2" overhang of tool's edge from edge of the mirror. However when the tool (tool's centre) is moved to the 70% zone of the mirror the overhang becomes huge. I don't know how much because I haven't physically moved it to this position, nor have I made scaled down drawings to determine the amount. My question then becomes, with the 24" dia. tool's position centred on the 70% zone of the mirror how much lateral overhang should I aim for so that 1) mirror remains spherical 2) mirror maintains same radius. If there are any other variables I should be aware of (such as turntable speed, # number of strokes (complete movement of tool across mirror's surface), please let me know. Not yet ready to grind. Tool has been cast. Two spherometers to be made, a wet/dry shop vac to be purchased, a bevelled 42" long, 20" wide 0.5" thick piece of plate glass, two pieces of melamine 0.5" thick with cut edges sealed, astroturf yet to be purchased. Hopefully by May the grinding should begin... Dan Kahraman
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