[ATM] Channeling a tool

[Mike Lockwood <melockwo@uiuc.edu>]

Jeff,

Jeff Lowe wrote:
> Glenn: For a 6" there should be no reason to use tiles on a glass tool, 
> or even channeling it for tha matter,

Agreed.

> but If you want to try channeling 
> I'll bring an abrasive cutoff wheel, some goggles and a respirator on 
> Saturday.

Channeling a tool improves abrasive distribution, and leads to faster, 
more uniform grinding.  A tool with channels will let you finish an 
abrasive grade more quickly, and also with a better sphere. 
Additionally, it prevents vacuum locking the two pieces together 
during fine grinding because air can get into the channels.

I encourage it - just make sure to use a wet grinding stone on the 
edges of the channels to remove sharp edges and flakes of glass that 
might chip off during grinding and cause scratches.  This is 
especially important for fine grinding.

	Mike L.

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