On Mon, 12 Aug 2013 20:47:38 -0500, "Lloyd E. Sponenburgh"
lloydspinsidemindspring.com wrote:

"RogerN" fired this volley in
om:

Yes but the positions can be defined relative to a fixed position or
the current position. Like in Autocad I can make a line from point
1,1 to point 2,1 or from point 1,1 to point @1,0 and both produce the
same line but the 2nd position in the 2nd example is defined relative
to the first point

You don't get it. This ain't rocket science; it's the whole basis of
CNC.

If a position is referenced to a fixed position, it's an "absolute
position". Period.

If it's referenced to an arbitrary position that may (will) change, it's
"relative". Period.

The 'fixed' position may be an 'origin' established for one job only, but
it does not change during the entirety of that job.

A relative move can happen from wherever the 'cursor' (tool, pointer,
probe, whatever) is at the time the relative move is commanded.

I hate to say this, but if you don't understand that, you also don't
understand how your Autocad works, only how to "work" it.

sigh

Lloyd

Gentlemen....those two different moves are normally called "absolute"
and "incremental"

This link..is from the OmniTurn programming manual

http://www.omni-turn.com/pdf/Sec2%20Programming.PDF

It was designed for lathes..but the basics remain the same no matter
what machine it runs on.

Gunner

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