In article .com,
rashid111 wrote:
[ ... ]
I did look around on the Web and have quite an extensive collection of
metalworking literature @ home, so I do have a pretty good
understanding
of a what an industrial SG looks like and how it works etc.
My whole setup is in a garage and I can not get a used SG from Ebay in
there,
unfortunately. But then again, my work envelope is tiny (1x3"),
compared to even the
smallest industrial SGs (6x12")
Try the Sanford, which is 4x7" envelope. It is a benchtop
machine, not a floor-standing one. I just checked on eBay, and they
don't have one at the moment -- but one would be an excellent starting
point for your CNC machine.
[ ... ]
In my dreams 
I see myself loading a (pre-cut) strip of blue steel
onto the chuck and carefully
aligning it with the X -0 point, loading particular reed's profile into
Mach2 and hitting "go".
Minute later I have a complete reed, tuned to within 50 cents of target
or, may be, dead on
That level of accuracy is possible, but I don't see it happening
in 60 seconds -- especially with your low power spindles.
I don't really have to spin @ 4000rpm, can probably go much lower.
Probably not. The cutting behavior of the stones is a function
of the SFM (Surface Feet per Minute). A smaller stone needs to go
*faster* to cut as well.
About X-Y travel: just might have to go that route. Ideally as long as
I am doing it,
I'd like to build a X-Y-Z CNC assembly that I can use for milling or
grinding. One immediate
problem is the grinding dust - it will be offly hard to absolutely keep
it out of the ballnut.
Another is price: my very limited grinding envelope doesn't require a
whole lotta of travel,
Remember my comments in another followup about needing to grind
in the entire top of the magnetic chuck prior to putting it into
service.
there is no forces to speak of - and it means I can go with short
5-10mm ballscrews and
linear rails.
Good Luck.
Building milling-capable assembly is a whole different ballgame - 3-4
times more expensive.
Much longer and beefier rails and ballscrews.
But -- no grinding swarf to destroy your ways (linear rails).
Grinders are *nasty*.
Good Luck,
DoN.
--
Email: | Voice (all times): (703) 938-4564
(too) near Washington D.C. |
http://www.d-and-d.com/dnichols/DoN.html
--- Black Holes are where God is dividing by zero ---