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Coax indicator design

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BillTodd:
Just a qucik update:

Missionfish, the company that runs the ebay charity donation system have finally taken the money from my paypal account.

However, it appears that The Royal British Legion will not actually receive the donation until December 30th (a 45day delay to allow refunds, apparently). I can only hope Missionfish give a proportion of the interest accrued on their holdings  to the charities (else I'm not sure I'd use the ebay method again!)

Bill

Davo J:
Bill, this may interest you
http://madmodder.net/index.php?topic=6246.new#new

Dave

BillTodd:
Coax V2 coming soon....

zimma:
Hi chaps,

Just a quick hint for those of us with limited Z clearance, or with a round column mill that loses accuracy when changing the height of the head (because of that limited clearance).

I have an MT3 spindle in my mill. If I use a 10mm MT3 collet to hold the coaxial indicator directly in the spindle, and not in a chuck mounted in the spindle, then the touchdown point of the indicator probes is pretty similar to the touchdown point of an endmill in a collet chuck.

I had always struggled with Z axis travel as I used to just swap the coaxial indicator directly for an endmill in my ER32 chuck until i realised I could gain the whole length of the ER32 chuck by mounting the indicator directly in the spindle with a collet.

Hope this helps

Graham

BillTodd:
Hi Graham,

Good advice :)

The coax indicator above was designed to work with my Haighton mill which has even less Z clearance than my RF30*.

Even if made a collet for the Int30 spindle taper a normal Blake's type coax is too tall to be of any use. The one above sticks out about 3" from the chuck with the shortest probe.


Bill

*incidentally, I have fixed my round post problem with a wish-bone stabiliser

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