On 03/05/2018 10:33 AM, John Kasunich wrote:
On Mon, Mar 5, 2018, at 10:25 AM, Mark wrote:
At any rate, what the question above is asking, does the correction
happen while the X axis is moving to smoothly blend the adjustment, or
does it try to jump to the correction without blending the two axis's moves?
The "lin" in lincurve stands for linear interpolation. So yes, it blends.
I was hoping that was the case. ;-)
Yes, there are groups of X axis stations that have the same offset. What
I'm trying to figure out is how to map those X axis coordinates that are
in that group. If the X axis stations between say 15 and 25 are all the
same, but the next group of X axis stations which are the same between
26 and 31 are different than the previous group, how would I map that
between the x,y coordinates in the lincurve statements?
Example:
The error between X=0 and X=4 is zero, then it ramps up to 0.002 at X=5,
hits 0.003 at X=6, then remains at 0.003 for the next 8", until X=13. Then
it ramps back down to zero at X=14, and hits -0.001 at X=15, where it stays
until X=21.
So you would use the following X,Y pairs:
0, 0.000
4, 0.000
5, -0.002
6, -0.003
13, -0.003
14, 0.000
15, 0.001
21, 0.001
You can use up to 16 pairs. Best approach is to plot your measured errors
on a piece of paper or in a spreadsheet, then find the set of 16 (or fewer)
straight line segments that best matches your measured error plot.
Ah ha! The lightbulb is beginning to illuminate. I was planning on
doing exactly what you mentioned in the last paragraph, and from the
measurement groupings I have it should take a lot less than 16 pairs.
Thanks for the clarification John. I might nick this beast yet. ;-)
Mark
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