Re: [CAD_CAM_EDM_DRO] USB and ncPOD system

On Thu, 24 May 2007 11:59:40 -0400, you wrote:

>>Mach3 works great for threading with a single pulse per rev.

Agreed

>Ah - the requirement was for EMC2, not in general. My suspicion is that
>the single pulse method will not work well in situations: where you're
>taking heavy cuts relative to the spindle mass/power. Also, if the
>material removal rate is variable (as it could be for a tapered thread
>or something like that), it can cause issues.

A taper thread is no different to the way a parallel thread is actioned?
We tend to use a constant volume cutting strategy, which works very
well.

I do agree that with marginal power spindles multiple pulses can be
better, but if your spindle is slowing enough to affect the thread,
perhaps you should be looking at what's wrong with your code and alter
it to suit the limitations of your particular machine.

>We may get a chance to test some single-index threading at CNC Workshop
>this year - I'll certainly be interested in seeing just how "good
>enough" that is.

What with EMC, Mach or both?

Steve Blackmore
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