Re: [CAD_CAM_EDM_DRO] Auto Tool Changers - EMCO

Hi Bill,

Yeah, later when I get mine! An H-bridge instead of a relay, and a pair
of 555 timers sounds like it could replace it, IMO. A pb starts the
motor turning to advance to the next tool, then times out. When it
times out, a second timer starts to run the motor in the opposite
direction (lower current). Add a few LED's, should be simple!

But yeah, it'd be FUN to OVER-ENGINEER this, and tie it into a
controller program.

Alan KM6VV


wanliker@... wrote:

>
> Will have to check current and voltage. Motor is very small, about 1 1/8 2
> 1/2.
> The card is going to be extremely hard to interface two. Six different
> cables plug into it.
>
> Easiest is to pull in a DPDT relay, pulled in, is high voltage, used crossed
> wires for the reverse, replace one wire with a resistor.
> One Push button and the operator pushes it.
> Then in the future use a stepper when you get yours and make a program for
> it....grin