re:Re: old sherline Y travel
Posted by
ballendo@y...
on 2000-10-18 17:09:41 UTC
Alan- So if you space the headstock out further, do you have to
remount the vertical column? I've run into the vertical column with
setups before!
No. When you install the headstock spacer, you increase the throat
size. The effect is: instead of having the spindle in the CENTER of 3
inches of travel, where you can go 1.5 inches in Y either way, you
now are over the 2.75 mark and can go .25 one way, and 2.75 the
other.(numbers used are not exact, just to illustrate the idea)
The increase to the vertical column height deals with another
problem. The dovetail "ways" of the z axis stick out into the work
area, reducing the "usable" throat size for big/thick work. As long
as your stock/setup is thin enough to pass under this dovetail
upright, there is nothing to be gained by increasing its height. In
the situation you have, the angle table IS increasing the height of
your "setup" such that you run into this column when you still have Y
AXIS travel.
Don't forget you can add "table size" with a piece of alum, say .500
x 6 x 9, and now you can mount the "tilt table" on this piece where
only air was there before.(off the sherline table, so to speak)
<snip> I can then turn the rim and hub faces, bore it .375", and cut
swing it. Set up with a pivot on the "extension table" above, and
mill "hextants", including the rim and outline! Without the rotary
table! Just use circ interp. Spin it in a drill press to polish out
the "mill" marks and ADD "lathe" marks <G> and no one will know it
wasn't done on a lathe.
Seems I was tellin' ya how to avoid a lathe in a thread awhile back,
too :-) (eccentric follower, I think) I like lathes, really!!
about CY pricing policy filling Ballendo's head...
exchange for flex-ability in the machine! And you add the hassle of
"tramming it up" just like a "real" mill. The std. sherline mill
pretty well "stays put" unless it's over-stressed. And repeating a
previous setup takes longer as there's more to adjust/align.
Ballendo
remount the vertical column? I've run into the vertical column with
setups before!
No. When you install the headstock spacer, you increase the throat
size. The effect is: instead of having the spindle in the CENTER of 3
inches of travel, where you can go 1.5 inches in Y either way, you
now are over the 2.75 mark and can go .25 one way, and 2.75 the
other.(numbers used are not exact, just to illustrate the idea)
The increase to the vertical column height deals with another
problem. The dovetail "ways" of the z axis stick out into the work
area, reducing the "usable" throat size for big/thick work. As long
as your stock/setup is thin enough to pass under this dovetail
upright, there is nothing to be gained by increasing its height. In
the situation you have, the angle table IS increasing the height of
your "setup" such that you run into this column when you still have Y
AXIS travel.
>I have a 1" x 3" x .25" piece of stock, and I need to cut a bevel onThe length of your angle cut is 3 inches?
>the long side. Actually two bevels that intersect to form a right
>angle. This is a "foot" that supports a "leg" up at a 70deg
>angle. Put two of 'em together, and you get the bottom half of the
>letter "A".
Don't forget you can add "table size" with a piece of alum, say .500
x 6 x 9, and now you can mount the "tilt table" on this piece where
only air was there before.(off the sherline table, so to speak)
<snip> I can then turn the rim and hub faces, bore it .375", and cut
>back from the rim to face the spokes (at least I think 4.5" willYou could also "mill" this on the CNC sherline, if your lathe won't
>swing on the lathe).
swing it. Set up with a pivot on the "extension table" above, and
mill "hextants", including the rim and outline! Without the rotary
table! Just use circ interp. Spin it in a drill press to polish out
the "mill" marks and ADD "lathe" marks <G> and no one will know it
wasn't done on a lathe.
Seems I was tellin' ya how to avoid a lathe in a thread awhile back,
too :-) (eccentric follower, I think) I like lathes, really!!
>CY545's are about $75, unless you buy in quantity.That's the same as they were in '92. Hmmmm..Interesting thoughts
about CY pricing policy filling Ballendo's head...
>How about the 2000 mill? Any one use it for CNC? Has a BUNCH ofThe 2000 is a trade-off. You gain flexibility in positioning in
>throat. Looks like more flexing in the head, 'tho.
exchange for flex-ability in the machine! And you add the hassle of
"tramming it up" just like a "real" mill. The std. sherline mill
pretty well "stays put" unless it's over-stressed. And repeating a
previous setup takes longer as there's more to adjust/align.
Ballendo