Re: port problem

--- Alan,
thanks for the response. I just connected pin 1 of the port to the
plus of the relay and the minus on the relay to pin 18 of the port.
No good?
Terry
In CAD_CAM_EDM_DRO@egroups.com, Alan Marconett KM6VV <KM6VV@a...>
wrote:

> Terry,
>
> I don't know how you're wiring the SSrelay, but you might just need

an

> open collector transistor to drive the SS relay. Most parallel

ports

> can SINK more current then they can SOURCE. Are you using the

"active

> low" level to drive the SS?
>
> Alan
>
> Terry Ackland wrote:
> >
> > Guys,
> > I have finally got around to connection up the recommended relay
> > (CX240D5) to my parallel port and a spindle but I am not having

any

> > luck.
> > I can turn the 5 volts on and off using M-codes but there does not
> > seem to be enough current to operate the relay. It was mentioned

in a

> > previous post that a new parallel port board would be needed if

there

> > was not enough current available. Would someone advise me on the
> > particular board and what should I ask for when ordering one? I am
> > using an old 386 which is fast enough for what I need.
> > I also have a backup 386 that I picked out of the garbage, it

works

> > fine but the pins switched by M-codes are always on even when
> > instructed to turn off so I think 2 boards are should be ordered?
> > Thanks, Terry Ackland
> >