Re: sherline motor/speed control wiring IT WORKS!

Hi Tauseef,

I don't have a relay connected yet (I'm currently using a VARIAC to
control my Sherline), but an SSR (SSS) should work fine. Otherwise, a
transistor can be used to "drive" the relay. A 2N2222 used in common
emitter, coupled with a 2K resistor to base, should be able to "pull
down" the coil of a relay.

Alan KM6VV
P.S. My old controller fried years ago!

tauseef wrote:

>
> hey Alan
> I tired several different relays but there is not enough current to
> trigger it. I did not try a SSR however. Have you connected a relay
> to yours and had it click over? If so which relay did you use. If so
> then connecting that to I1 and I2 on the sherline board is all that
> is needed to start and stop the motor. I asked my brother (he is the
> electronic guru) and he is coming up with a circuit using and opto-
> coupler. Will let you guys know if it works.
> thanks
> tauseef
>
> --- In CAD_CAM_EDM_DRO@y..., Alan Marconett KM6VV <KM6VV@a...> wrote:
> > Tauseef,
> >
> > I'm sure you already know, but you need a resistor in series with a
> > LED. Also, the line from pin 1 is used to "pull down" the SSS
> (Solid
> > State Switch) (-) terminal (+ to +5v). Actually, LED's should be
> > connected similarly (LPT pins as pull downs).
> >
> > Alan KM6VV