Originally Posted by
rlockwood
I've forgotten most of the requirements of this job, but pit bull clamps really still don't do a great job if faced with holding incredibly tall parts. I'd probably make a block with a bunch of V's around the periphery, drill/tap a hole on each side of all of the V's, then make a bar clamp to span them. High part density, low material cost, V won't be perfect on the first op, but round stock is actually quite consistent on diameter, and the second op would repeat to the first quite well. Make two, and make them so they attach to a main fixture that stays put in the machine. Then you can load one up while the other runs, and the swap when it stops just takes a few seconds.
Keep in mind that when you place more parts on the table, more get ruined when something goes wrong. I'd suggest at minimum installing a simple switch as a tool setter and using it to verify tool length (and as such, breakage) once in awhile during the cycle.
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