Re: Mori Seki SL1 NC lathe programming

On Mon, 01 May 2006 22:33:48 GMT, BottleBob <bottlbob@xxxxxxxxxxxxx> wrote:



Cliff wrote:

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


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.

Well 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.

Cliff:

Who cares what it "sounds" like to you. I'm just relaying the facts as
they are.

On two shop-floor CAM systems ... ?

It seems like JB was correct in one thing, you seem to be out of touch
with modern CAD/CAM systems.

LOL ... he'd have problems finding holes.

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>.

Irrelevant to the discussion.

So your intent was to destroy the macine?

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?

ALWAYS? Few things are ALWAYS a good idea. This Cliffasion is also
irrelevant to the discussion.

It was your hammer, not mine <G>.

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?

Did you mean millionths?

Probably.

How many do you want, is 2,000 millionths per
side enough?


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>.

So you're NOW contradicting what you originally wrote?

Nope.

Is this an
official retraction? Here are the original comments again for your
edification:

BB wrote:

"If the bar is larger than the ID of the guide bushing the bushing
would
probably contact the bar only at the edges of the splits."

Cliff replied:
Oops .... Geometry issues again.
Those edges would be farthest AWAY from the stock <G>.

Thought you were a backwards sort of guy .... <G>.
Have all of that in order?
--
Cliff

.

Relevant Pages

  • Re: Mori Seki SL1 NC lathe programming
    ... Gibbs lathe geometry ... geometry in the X,Z coordinate system. ... diameter stock is put in a collet, bushing, or bored jaws that ARE ... You've never used a variety of collets? ...
    (alt.machines.cnc)
  • Sieg C2 lathe and X2 mill
    ... In an earlier message "Sieg C2 and others the same" I asked if the Sieg C2 mini lathe was the same as more expensive alternatives. ... check gears as above; ... I've gone for ER32 MT3 collets from Arc Euro Trade and a screwless vice. ...
    (uk.rec.models.engineering)
  • Re: D1-4 spindle or $700?
    ... The Morse collets do not allow the workpiece to pass through the collet, so the grip on a workpiece has to be at the end of the stock. ... The only real drawback to Morse taper collets drawn in with a drawbar is that they require a somewhat firm rap to release them, and that shock load is opposed by the spindle bearing. ... Lathe operators have been doing this for a couple of generations now, and no immediate damage is caused when the collets are released cautiously. ... The buyer should be prepared to disassemble much of the machine after delivery to perform several tasks including replacing most of the shitty fasteners with better quality ones, deburring and removing sharp corners that will easily cause cuts in the hands of the user, a thorough check of all electrical connections, improving alignment of numerous parts, and cleaning and final adjustments to allow the machine to operate as one might expect a new machine to. ...
    (rec.crafts.metalworking)
  • Re: Precision vs. "Regular" collets
    ... Other than you could change end mills in the collets. ... you mean end mill *holders*?) ... I see no advantage to using end mills in MT3 holders in my lathe ... the spindle anyway. ...
    (rec.crafts.metalworking)
  • Re: Precision vs. "Regular" collets
    ... 5C collets have a grip range on the order of 0.007". ... For feed-through the spindle, you would have to make your own ... to find gears for -- or better metric conversions gears for the lathe. ... holder mounts to the chuck. ...
    (rec.crafts.metalworking)