Re: [CAD_CAM_EDM_DRO] Re: +/- 10 V To Step/Dir Converter Circuit

turbulatordude wrote:

>--- In CAD_CAM_EDM_DRO@yahoogroups.com, cnc002@... wrote:
>
>
>>
>>In a message dated 3/12/2007 5:03:03 A.M. Eastern Daylight Time,
>>riet91@... writes:
>>
>>Hi All,
>>
>>Does anyone know about such circuit or IC which
>>converts analog +/-10 V into Step and Dir Signals?
>>
>>regards
>>
>>Babar
>>
>>
>
>
>It would be a simple circuit to make up.
>
>is the +10 and -10v a floating value ? like would the motor move
>slowly at 5volts and faster at 10 volts ?
>
>

It is an analog velocity command to a servo amp. Yes, it would vary
from 0.000 V
for no motion up to either -10 or +10 V for full speed in one direction
or the other.

>or, would it be either 10V or zero or -10v ? and nothing in-between ?
>
>Using a comparitor to look for anything over say 9 volts and if it
>were over 9 volts, it would then send out a pulse train.
>
>everything between +9v and -9v would be zero and not move. as -9v the
>same thing would happen, but also the DIR would change.
>
>
>

This would cause the servo to go completely crazy. I'm sure this is NOT
what
he is looking for.

Jon