Wild_Bill wrote:
It seems as though the fixture clamps are toe-type pieces that are actually
clamping down on the rolled edge of the lid/workpiece.
--Yes.

Wood backup material may be acceptable for 50 pieces, but I'm not familiar
with how hardwood or plywood reacts to flood lubricant/coolant.
--Not too badly with a coating of Bondo and mold release first.

Radiused internal aluminum pieces, secured to the baseplate would likely be
better for a longer production run, mounted in a way as to not have the
cutting tool run into a hardened screw head.
--Ack; think I'll go with wood for this short a run.

What function are the circuit boards when they're finished?
--Something I couldn't find commercially so am making instead: a low
speed tachometer. Most tachs read in thousands with resolution in hundreds.
This reads resolution of 1 to 5 rpm. I made it for my boat's steam engine. I
can count with a stopwatch up to about 300 but beyond that I'm stuck. Engine
runs sweetest a little over 400rpm so I need a tach to do it right. The
trouble with the bicycle variety is the crappy display; mine's got a nice,
bright readable display that I can read at night and in sunlight.




--
"Steamboat Ed" Haas : Steel, Stainless, Titanium:
Hacking the Trailing Edge! : Guaranteed Uncertified Welding!
www.nmpproducts.com
---Decks a-wash in a sea of words---