<fr...@...> writes:

> 
> Hallo,
> I new to EMC and before I start to work my self through the documentation
> and try to get it running with my machine I’d like here your opinions:
> 
> I’m looking for a solution to control a 4 axis CNC mill (3 axis router +
> rotator axis). At the moment the mill is controlled using Mach 3 running
> Windows XP. The mill is controlled by simple step and direction signals,
> it is connect to the PC by using two LPT ports. So I think it should be
> rather easy to setup EMC, right?
> 
> The reason I’d like to change the soft CNC is that Mach 3 slows down the
> machine dramatically on complex fine cuts with a large number of short G1
> movements. Can I expect an improvement of the cutting speed by utilizing
> EMC? I think it depends on how good the tool path look ahead is. What can
> I expect from EMC running on a standard PC (3 Ghz Core 2 Duo, 2GB RAM, 2
> PCI LPT cards)?
> 
> I hope you can comment on my quite unspecific questions.

Flo,
If you are using CAM to generate your G-code maximize the path tolerance to
reduce the number of line segments. I do 3D contouring in VisualMill and can
double the size of my G-code by specifying .001 tolerance. Unless you are
machining with a very rigid state of the art machine you wil never see the
difference. I run with a segment tolerance of .005. Also check to make sure that
you are outputting circles intead of line segments.

Roger




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