99273Re: First Month With SmoothStepper
- Oct 1, 2008--- In email@example.com, "gcode fi (hanermo)"
> And NO, you absolutely *cannot run reliable mach* onI have a feeling you are not aware of how the SS works. When you
> a laptop by using the SS. Some will work. Some will
> not. Most you wont know about. The processor speed
> changes, uncontrolled dma, non-std diska access
> interrupts, non-std (buggy) video drive cards and
> accesses etc. etc. very very common on laptops are
> not cured by the SS.
offload the step generation task to an off-board processor, none of
this matters as long as the off-board processor has enough buffered
movement to run from, to cover the things you mentioned. If an
external step generator is used, I disagree with those that say a
laptop is not reliable for running a CNC machine. A laptop is nothing
more than a PC that is compactly integrated. Granted, it might have
power-saving features that need to be turned off (i.e. hibernation,
hard disk spindown, etc.), but these same settings exist on desktops.
Nothing you mentioned makes a difference to the SS unless it
interrupts the CPU and the USB communications for a fairly long time.
The SS can be configured with a buffer as long as 4 seconds. I would
hope that that is enough time to catch up if it gets behind. With all
that said, would I use a laptop to cut a very expensive piece of
material? Probably not ;-) But I don't think I'd use any desktop for
that matter unless I had run it for many hours to gain the confidence
I would need to run that job.
> the harshI agree ;-)
> reality is that the customer perceptions and
> expectations are just flat out wrong.
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