Re: [CAD_CAM_EDM_DRO] Re: USBCNC was PICstep

turbulatordude wrote:

>
>
>
>>So what's wrong with http://www.usbcnc.com/ ? Again, everything goes
>>in the PIC code.
>>
>>
>
>Interesting product.
>
>first thing I see is the 25Khz as the listed top pulse rate.
>
>

I noticed that too. Funny how that fact was just brushed aside ;) As
I said Mach defaults to 25Khz, which is too slow for real servo
performance, but also would not max out most steppers.

Any product like that has to be able to get something close to the step
rates of say the G100 to be viable, especially for servo's. I cant say
the 4Mhz the G100 is apparently able to do is realistic, but certainly
250Khz is. The geckodrives are rated at least to that...

>I did not see any mention of a modbus support for external devices,
>but that has got to be a future addition and probably a second board.
> I think that if you are going serial, it would be a simple extention
>of the USB.
>
>

Yes just as important. Not specifically Modbus but someway to expand
i/o and actually have some control over it.


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Wayne M Weedon Email: wayne@...
Fdos Design Poole UK
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Specialists in small batch & Production Mechanical/Electrical Engineering
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