I actually have a 7i77 but couldn't bring my self to use it on this 
project.  It is way overkill.  I basically didn't need that much i/o, 
encoder counters and analog outs....  1 5i25 has 34 i/o.  I am probably 
only going to use around 19.  (give or take).  The 7i77 is still very 
inexpensive for what you get.

sam

On 1/24/2017 1:17 PM, Andrew wrote:
> 2017-01-24 19:37 GMT+02:00 sam sokolik <sa...@empirescreen.com>:
>
>> PWM/dir  though the bob.  (these amc drives instead of +/-10v take pwm/dir)
>>
> Ah, so convenient. We could save a lot on 7i77's if all servo drives were
> like this )
>
> Andrew
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