From: Guy Brandenburg 
To: Jerry 
CC: ATM List 
Reply-To: Guy Brandenburg 


There were lots of speedy responses to my query on this, and I would like
to thank all of those who contributed. It's interesting that some people
say that having severe cardioids, caused by the 3:1 ratio, is going to
cause severe problems with zones and such. (Actually, it looks to me that
there would be not just zones but severe astigmatism in that the surface
would be nothing at all like a surface of revolution!) Others say that the
slippage that is bound to occur with the belts (not gears) will prevent any
repetitiveness and will prevent zones or astigmatism from occurring.

Guy Brandenburg

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