Re: spindle start and stop

Doug, thanks.
Will there be enough voltage in the parallel port to operate your
recommended relay? I seem to remember that that the max. voltage from
the port is 3 volts and the minimum req for the relay is also 3 volts.
Would there be a problem regarding safety?
Thanks, Terry
---
In CAD_CAM_EDM_DRO@egroups.com, "Doug Harrison" <prototype@c...>
wrote:

> > > Hi,
> > > I wish to start and stop the spindle on the machine I am

building

> > > using M codes (M3, M5 ?) What would be the proceedure? I can

remember

> > > reading somehere that a relay connected to a pin on the port

will do

> > > the trick? The drive motor is a 3.3 amp.
> > > Thanks in advance, Terry
> >
> Hello Terry;
>
> I selected Crydom solid state relays for the wonderboard project.

They are

> available from DigiKey in a variety of configurations and capacity.
>
> The one you need is Crydom # CX24005 (DigiKey # C-1063-ND) which

sells for

> $9.02. This unit requires 3-15 VDC to fire and will handle 280 VAC

at up to

> 5A.
>
> I have assumed you require AC switching. If not, DC configurations

are also

> available.
>
> Doug