hi Jon & Tim,
suggest making the deceleration override a G-code instruction as you want
to turn it on for the many short moves of an interpolated spline as you point
out, but on a square feature on the same part you want the motion completing
in one axis before starting in the other.
an even better approach is found in a commercial control i use at work
which has a parameter set in G-code which they call "Tangency factor" that
automatically controls the overlapping accelerations between blocks based
on the angle. (how it works i don't know -- not open source -- mfg Thermwood)
-ron
On Sun, 6 Jun 1999, Jon Elson wrote:
Tim Goldstein wrote:
---snip---
kept running it lower and lower just to try it out. At
Acceleration set to
.05 it does this lazy motion thing. At .15 it looks ok. When I cut parts
I will check it for sure.
This is the blending of moves. It can be a problem when you make an X
move, then a Y move, as the Y move will start to ramp up when the X move
just begins to ramp down. But, for a string of short continuous moves describing
a fluid curve, you need this, or the machine will absolutely CREEP. (My
antique AB suffered from this.)
Maybe we should ask Fred Proctor for some sort of switch (either in
the RS-274 program (G-code) or on the user interface) to turn this
on and off.
