Re: Another Try

--- In CAD_CAM_EDM_DRO@y..., "markatswat" <markatswat@y...> wrote:

>
>
> Well I asked a pretty open ended question last time and was

summarily

> ignored... :) So a bit more specific this time!
>
> Do I buy the AHHA Card and Software and use Gecko G201's to drive

the

> steppers on my bridgeport, or do I buy the RC-500 for it???
>
> What are the pro's and con's of each?
>
> Obviously there is a big $$$ difference.
>
> I have gotten some conflicting info and would love to know what the
> collective here thinks.
>
> Mark
>

Ahha vs. the Gecko , for my money as long as the stepper specs on
the BP fall into the Gecko range you should be well able to put a
nice electronics package together for $1000 less than the Ahha . If
you like the software the board package seems fine . If you need
higher current I don't know of another driver that is a micro
stepper / chopper drive but often ebay has larger units.

With the Ahha you are paying for a well integrated and capable unit
so it's time vs. money I would guess.

The best looking stepper setup I have seen so far in the
experimenters area would be Jon Elson's universal stepper board and a
set of Gecko's running EMC.

http://www.pico-systems.com/univstep.html

This system does not get much mention but up and running should kick
butt. This would be a lot like the Ahha system except they use a
card . This type drive uses a velocity command structure with
hardware pulse generation. The system acts like a servo so when
moving slow following error is maintained by closed loop position
updates. When you need speed , high velocity commands can be output
without the host having to twiddle bits at insane rates to do it. If
I had the machine to do I would love to try this as I bet it would
really smoke.

BSP

> PS- I am open to other idea's as well, but the AHHA System seemed
> decent.