On 1/2/24 08:17, Adam McLeod wrote:
Fortunately, Sandvik standardized the Capto shank via ISO 26623. It is
called a "Polygonal taper interface with flange contact surface". If
you search "capto iso polygon shank" in duckduckgo search engine right
now, you may find that there is a "preview" of that standard in a pdf
that probably has the details you're looking for near the top of the
search results.
On 2024-01-01 9:04 p.m., Sam Sokolik wrote:
boy - there doesn't seem to be much info on that shape.. It does look
like
it could be machined/ground with spindle synced motion..
In that event, stretch the definition of spindle to include drives
similar to the A drive on the G0704, or the B drive on my 6040.
Those are both 3 phase stepper/servo's of 3nm power, both driving an
rvs30 series worm drive for a 5/1 reduction. These worms do have a half
degree of backlash that may not be wholly consistent, but I'm carving
buttress threads with them in synchronized motions, works fine. Top
speeds of something in the 400 rpm range. At a speed your Z drive can
track is a Sunday drive for that combo.
We have the trig functions, and a simple multiply based on the
remainder(mod) could easily return a triangular shape if its a sine. I'm
positive I could come up with something on the 6040 doable with its 24k
rev spindle and a CBN wheel. Not fast mind you, but doable. CBN is
gawdawful $$$ and fragile in shapes and sizes I've found but it will
"get the job done". It is much like diamond but cuts HSS w/o destroying
both as there is no carbon in it. Leaves no wire edge to be easily
broken off and dulled, HSS is finished like a shaving mirror. All it
should take is somebody better at math than me.
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