From: "Bob May" 
To: "atmlist" 
Reply-To: "Bob May" 


I teach my mirrormakers to rotate the mirror a few degrees by the
differential motion of the two hands and a bit of wrist rotation so taht
the rotation happens without any stopping or slowing of the stroking of the
glass across the tool.
Basically, let the one hand do the majority of the pushing and allow for a
bit of the rotation of the wrist to let the other side of the mirror fall
behind.  The weight of both hands is the same so the wear tends to be even
across the glass.  The other hand pulls the mirror back more than the first
hand and that also helps turn the glass.  Thus you go back and forth and
the mirror rotates slowly as you go.
Bob May
http://nav.to/bobmay
bobmay{at}nethere.com
NEW! http://bobmay.astronomy.net

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