Re: [CAD_CAM_EDM_DRO] spindle start and stop

In a message dated 07/23/2000 3:29:23 AM Hawaiian Standard Time,
wotisname@... writes:

<< 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

> 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

>>

Gents,

I find that Solid state relays are often used to control spindles. Most
have 3- 32 volt dc inputs at 3 to 10 ma, can control 24 -240 vac at up to 50
amps on large units. No noise too. Electrical or mechanical...

Peter
THRD, Inc.