Homebrew PCBs

At 10:12 AM 4/11/02 -0700, Steve Greenfield wrote:
>How 'bout this little thing? Too much weight to put in a plotter,
>but maybe in a homebuilt router/engraver.
>
>http://www.harborfreight.com/cpi/ctaf/Displayitem.taf?itemnumber=43155
>
>58,000rpm no load. There is a Harbor Freight Tools about 1/2 mile
>from my house.

That is probably the same as the unit I mentioned from Princess Auto.  I 
think that its cheaper here in Canada, though ($30.00 Canadian vs $36.00 US).

>How are you guys measuring runout? Drill with a stiff bit then
>measure the size of the hole? I don't have a micrometer that can
>measure the inside of a round hole.

I've done it that way (although that method includes any error resulting 
from an off-balance drill bit).  I also just stick a solid carbide shaft 
into the chuck and measure both play and run-out when rotating the shaft by 
hand.

dwayne




Dwayne Reid   <dwayner@...>
Trinity Electronics Systems Ltd    Edmonton, AB, CANADA
(780) 489-3199 voice          (780) 487-6397 fax

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