Re: [CAD_CAM_EDM_DRO] Auto Tool Changers - EMCO

In a message dated 2/26/2002 10:03:01 AM Mountain Standard Time,
smoke@... writes:

> I was wondering after reading your post if those timers were actually
> stepper switches. Then I thought, 'they must be timers, Bill should know
> what he's got'.
>
>

I have not really closely looked at the boards, but assume they are timers,
because they operate for a definite time forward, then a time in reverse.
When indexing more than one position, they go forward, stop, go forward
again, then finally reverse.

The main clincher in my thoughts about timers is the fact that the motor is a
two wire DC MOTOR, not a stepper. The polarity of the motor reverses to go
backwards.

The board is 5 x 5.5 double sided traces, with a parts count of 8 IC's, 18
transistors, three LEDS, One Relay.
The main output will be the DC motor, it will also report to and accept from
the computer the signals as what it is to do.
When it is removed, no other functions are lost. Except possibly display
information.
bill


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