Re: spindle start and stop

Thanks,
I want to turn a small router motor on and off after a short cycle on
a repetative job so I will require something that will stand up.
I have been checking through the software documentation, such as it
is, and they mention that M3,M4,M5,M7,M8,M9 act on a second parallel
port and can be utilized for programmed outputs. It says that M3
turns pin#1 on, commonly clockwise spindle and M5 turns pin# 1 off.
Looking at the pin assignment for the software, the printer port
pin#1
has no assignment. Why would I not be able to use pin# 1 without
using
a secondary parallel port?
Very confusing for an old mechanical boy like me, Terry

---
In CAD_CAM_EDM_DRO@egroups.com, "James Owens" <wotisname@l...>
wrote:

> Hi Terry,
>
> It is possible and simple to control on and off using a relay but

at
3.3

> amp. there will be a lot of burning of the contact points therefore

wear

> will be a problem. A better solution would be a triac circuit. I'm

sure I

> have one somewhere if you want it.
>
> Regards,
>
> Terry
>
> ----- Original Message -----
> From: Terry Ackland <hexagon@o...>
> To: <CAD_CAM_EDM_DRO@egroups.com>
> Sent: Saturday, July 22, 2000 5:50 PM
> Subject: [CAD_CAM_EDM_DRO] spindle start and stop
>
>
> > 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