Re: [CAD_CAM_EDM_DRO] Re: Position counter stop updating....

Hi,
Some what related (tongue in cheek), I had a circuit several years ago that
was rated at 5V. Now normally, there is supposed to be a tolerance on the
voltage of +/- X Volts (10% rings a bell in my ancient, feeble brain); but
to make a long story short, this one chip WOULD NOT WORK at less than 5.00
Volts! It might be possible that yes, the noise is a problem, but it is
because the chip isn't following the industry norms and REALLY needs that
extra 0.1 volts to work.

Just a thought for you to try.

At 08:38 AM 9/4/02 -0700, you wrote:

>Hi Forum
>After reading valuable suggestions. I checked my
>system
>The power source to the encoders fed from STG-II seems
>OK since there is no voltage drop (it was found 4.9V).
>
>Now when I switched off power to my DC Drives and ran
>dc-motors by hand, all those counter stuck problems
>were gone. and I could see the counters running back
>and forth without any trouble...
>Since in our system encoder signals are straight (NO
>DIFFERENTIAL)
>I with the valuable information by the forum members
>concluded the problem is related with NOISE. Now I am
>going to convert the encoders signals to differential
>mode signals using IC 75174.
>I will let you all know about the progress of our EMC
>system when we finish doing this work.
>Thanks and best regards
>
>Asim & Ubaid
>
>PS: STG-II use the same chip 7166, which was used in
>STG-I

Bubba

OLDER THAN DIRT
Country Bubba
(Actually the inventor of Country and Bubba)

axtein@...
LaGrange, GA

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