> Date: Fri, 13 Sep 2013 22:02:07 -0500
> From: [email protected]
> To: [email protected]
> Subject: Re: [Emc-developers] Some trajectory testing between mach and
> linuxcnc
>
> On Fri, Sep 13, 2013 at 03:56:50PM -0500, Daniel Rogge wrote:
>
> > As long as we're discussing the TP, however, there also exists an
> > issue with line-arc transitions.
>
> > If you watch the velocity display you will see that the program
> > with only line-line transitions (1" square) reaches 35 inches/min
> > - while the program with line-arc or arc-line transitions (1"
> > rounded square) runs at only 26 inches/min.
>
> Sorry, I thought I responded to this last time.
>
> Your first program has 1" long segments, and the second program has
> .5" and ~.4" (pi/8) segments. That they make approximately the same
> path doesn't matter. If you make a rounded-corner square with 1"
> segments (arc length on the corners 1", and the flat sides 1") I
> predict (but didn't verify) that you'll see matching speed.
>
> Of course the path cut will be bigger, but this is the valid test if
> you want to compare line-line apples to line-arc apples.
>
Chris
Is your argument that the 'square' corner example's speed is higher because
the straight lines are longer? (more time to accelerate)
With the g64 p.125 setting , aren't the corners rounded so the straight
line would be shortened to aprox. the same length or the round corner example?
meaning the acceleration time should be aprox. the same.
meaning the max speed should be aprox. the same.
Or did I miss something?
Chris M
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