On Tuesday 18 November 2014 08:14:54 Mark Wendt did opine
And Gene did reply:
> On Tue, Nov 18, 2014 at 7:42 AM, andy pugh <[email protected]> wrote:
> > On 18 November 2014 12:26, Mark Wendt <[email protected]> wrote:
> > > Ah, then, I guess it may or may not work for me.  My table is 55"
> > > long,
> > 
> > and
> > 
> > > my G Code is written for a Z station for every inch of X station. 
> > > Back
> > 
> > to
> > 
> > > the probekins I guess.
> > 
> > I think lincurve will probably work better in your case. Probekins is
> > likely to be confused by your lack of Y.
> > 16 points lets you define quite a complicated shape.
> > 
> > --
> > atp
> > If you can't fix it, you don't own it.
> > http://www.ifixit.com/Manifesto
> 
> Oops, I used incorrect coding.  Should be:
> 
> setp x1 v1
> setp y1 v2
> 
> If my Y doesn't change the length of the X axis, would the "v" number
> on the y line not change, or would it equal the number for the "x"
> line?
> 
> Sorry I'm being dense this morning.  Too much blood in my caffeine
> stream. ;-)

"Y" is its output, and has zilch to do with a Y axis you do not have.
X is its input from the motion x axis position, and the Y is the output 
correction to sum with the z value to get the profile you need.

If there is, for instance, a straight line taper from x=0 to x=11", and 
the machine has a straight line error between those 2 point, measuring at 
X+011.00 where the accumulated error is 7 thou then you would setp

setp x0 value zero
setp y0 value zero
setp x1 11
setp y1 -0.011 and it should make a straight cut

But then if your ideal profile shrinks by 23 thou in the next inch you 
would
setp x2 12
setp y2 -0.033

There is nothing stopping you from moving the x1 point to anyplace between 
the x0 and x2 points.  Ditto for x2, it can be anyplace between x1 and x3. 
etc etc.

Using halscope to trace what you are doing, I would be surprised if when 
the halscope trace looks good, your next strip you cut would be a lot more 
accurate, needing much less planing or sanding to get to the desired 
profile. Maybe even zero if the blades are sharp enough. When I am using a 
fresh ATBF blade in my table saw, I can get a decent enough cut that I can 
immediately do a 42" glueup, edge to edge without any recourse to my 
Bailey #7 or the jointer to get a perfect glue joint that holds for many 
years.  No biscuits in it, just edge glued.

One thing about bamboo I both like and hate is that when pushed, it will 
over time take that pushed shape and exert little or no back force. Which 
is why a bamboo pole needs to be hung from its tip eyelet to store. Lean 
it against the wall, and in a week you could use it for a recurved bow.

The year old bamboo stick swings totally different from a brand new one 
because of this.  The old one it seems, always has the better swing and 
"feel".  And no one has ever translated that good bamboo swing & feel into 
fiberglass at all well.  Carbon fiber is 10x worse IMO.  Way the hell too 
stiff to work my way even with an 8 or 9 weight fwd line.

Cheers, Gene Heskett
-- 
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Genes Web page <http://geneslinuxbox.net:6309/gene>
US V Castleman, SCOTUS, Mar 2014 is grounds for Impeaching SCOTUS

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