Awl,
If I make a fixture on a subplate, and the subplate bolts to the table via t slots, I will have to indicate the plate each time I put it on.
And, if I have a "palletized procedure", where I'm just swapping fixture plates with loaded parts, I certainly wouldn't want to have to re-indicate each swap.
So ahm thinkin, put a sub-subplate on the table, indicate accurately, and on that subplate have it accurately pinned so that the fixture plate drops accurately onto that, so each swap of a pallet is now accurate, no indication required.
Is this half-right? Pitfalls?
The next Q is: Does it make sense to drill/tap *the vmc table itself*, so that the sub-subplate itself can be put on accurately? Or is drilling/tapping the table itself just sacrilege?
I guess this could make sense if you were swapping the sub-subplate with vises etc very often.
Do people bolt on a thick subplate permanently, and swap out fixture plates AND vises on one subplate? We've had threads on alum subplates warping tables, as well.