Re: Sub-Plate strategies....


"Proctologically Violated©®" <UNfitcat@xxxxxxxxxxxxxxx> wrote in message
news:49ee6567$0$27781$607ed4bc@xxxxxxxxx
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.

--

Mr. PV'd


Go buy a renishaw probe. Not the expensive 3d one, just a 2 dimensional one
for pickups.

Procedure for putting a 10 X 10 X 2" plate on the table of a mill with no
probe.
1. clamp halfass to table, load indicator and indicate parrallel and getting
tight at same time.
2. Using indicator or edge finder pick up plate x-y location.
3. Touch off tools on top of plate.

with probe...
1. Clamp part to table. Don't even pretend to care if its strait. Just
clamp.
2. get probe from tool changer and probe 2 spots on front, creating correct
coordinate rotation. perfect alignment in seconds.
3. Probe block in for x and y. Seconds again.
4. Probe top of plate for z offset, since all tools are set from the table
or any spot on the table, this will tell the machine the difference in
height from the table. All tools previously loaded from last jobs will still
be set now.

total setup...2 minutes literally. No mirrors, no edgefinders, no backache.
You can easily add the pickups into the begining of the program with a click
of a button. Then drop a plate on and walk away.


.

Relevant Pages

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  • Re: Sub-Plate strategies....
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