Re: Mori Seki SL1 NC lathe programming

On Mon, 01 May 2006 21:20:39 GMT, BottleBob <bottlbob@xxxxxxxxxxxxx> wrote:



Cliff wrote:

On Mon, 01 May 2006 20:12:18 GMT, BottleBob <bottlbob@xxxxxxxxxxxxx> wrote:

"drive this CAD shape/contour" ......

Cliff:

You can't DRIVE a CAD shape/contour unless you're in the machine's
coordinate system. That's a pretty basic boo-boo there.

BS.
You've clearly not programmed many lathes.

Cliff:

Let me make a correction to help your understanding. Let's change
"machine's coordinate system" to "machine's axes".

Let's leave it exactly as I stated it, with the one typo correction.

AFAIK All CAD/CAM systems use the XY CAD plane for simple
lathe work & the posts just use the proper word addresses in
their output.

We let me correct your misconception then. Gibbs lathe geometry
creation and toolpath programming is done in the X,Z coordinate system.
And a quick look at an old MasterCam textbook says to create lathe
geometry in the X,Z coordinate system. So much for your *ALL*. Just
how long has it been since you "programmed" a lathe, 1, 2, 3, decades?

Sounds like rubbish to me.
OTOH for "shop floor programming" ... <G>.


ID >> OD.

Meaningless nonsense in this context, and you know it.

It was your argument IIRC.

LOL Do you STILL maintain that when when larger than nominal
diameter stock is put in a collet, bushing, or bored jaws that ARE
nominal size,
that the slits/edges would be farthest away from the stock like in your
original following comment:
"Those edges would be farthest AWAY from the stock <G>."

If it fits the nominal diameter or is smaller, yep.

We're not talking nominal diameter or smaller, we're talking slightly
larger.

Not good on bushings <G>.

If you have to open things up or bang things about ....

Excuse me? You've never used a variety of collets? FYI, some
collets have a lot of spring to them and when unrestrained easily open
larger than the nominal ID.

You think doing such is always a good idea?

Silliness won't save you. 2" stock wouldn't fit, but .005 over nominal
often would.

Not without lots of force to spring things ... <g>.

Yes, often without lots of force to spring things. We're only talking
a few thousandths per side here.

Why not just use milionths?

Answer the simple question:

And just where do you think .005 over nominal stock would
contact the collet/bushing first, the slits or the area between the
slits?

When the ID > OD on the edges as, IIRC, I stated some time back <G>.
Clearly also when ID < OD it's as I stated for that case.
--
Cliff
.

Relevant Pages

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  • Re: Mori Seki SL1 NC lathe programming
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