On Sun, 8 Mar 2015, Andrew wrote:
> Date: Sun, 8 Mar 2015 21:40:27 +0200
> From: Andrew <[email protected]>
> Reply-To: EMC developers <[email protected]>
> To: EMC developers <[email protected]>
> Subject: [Emc-developers] New TP bugs?
>
> Hello,
>
> Today I ran into a comparison of hobby CNC software on a russian forum. The
> guy made a test trajectory and run it on a few CNC's. Here's the results:
> KMotionCNC - 2:59
> NCStudio v5.5.60 - 3:12
> EdingCNC - 3:47
> Mach3 - 5:25
> PlanetCNC - 11:24
> LinuxCNC was not tested.
>
> So I installed a fresh 2.7.0~pre4 from git, edited axis_mm config to
> 100mm/s and 25mm/s2 for XY and 250mm/s2 for Z (by the test conditions). I
> also set G64 P0.1.
> The results were pretty unpredictable:
> 5:05 for arc segments and 4.50 for line segments with ARC_BLEND_ENABLE = 0
> 5:23 for arc segments and 6.50 for line segments with ARC_BLEND_ENABLE = 1
> Looks like ARC_BLEND_ENABLE switch is inverted.
> The way how it follows the trajectory confirms that too.
>
> Also, 2.7 often shows an arbitrary non-zero velocity on preview when the
> actual velocity is 0.
>
> --
> Andrew
>
> PS: I attached the test files, in case someone wants to try.
>
I have also noticed something that looks wrong with CAB recently I suspect
that the ARC_BLEN_ENABLE switch is correct but something is wrong with CAB
(changed setup defaults maybe?) that makes it slower than the old TP (It looks
to me like its stuck in exact path mode)
Peter Wallace
Mesa Electronics
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