Relay for spindle on/off

[yukonho]

I want to hook up a relay to control my spindle. Just on/off.
I am assuming a 5V relay, what kind of amperage rating do I need for the contacts? I use a dremel tool for the spindle, but I dont know how much current it draws. The biggest I can find is 3A, all the rest are 500mA or less.
Has anyone done this? Any suggestions on how to hook it up?
co

[HomeCNC]

http://www.mouser.com/index.cfm?hand..._pcodeid=52802

[yukonho]

Thanks for that,
Any suggestions on how to hook it up?
co

[Al_The_Man]

Originally posted by HomeCNC
http://www.mouser.com/index.cfm?hand..._pcodeid=52802

Keep in mind that these are printed circuit type and the contacts are usually rated for resistive load, if you intend switching even a dremel, especially switching at full rpm setting, these contacts may not last long, I would go with something a bit heavier rating and terminal type rather than PC type. If you want to get really fancy pick up a surplus solid state type with 5v input and 110vac load. Probabally last you for ever.
Al

BTW if you do use a coil type relay, don't forget the reverse emf diode across the coil. (typically a 1N4007).

[yukonho]

Thank you.
I have little knowlege about this type of thing and I would like it to work right from the start with no blowing things or me up.
That link showed none in stock and none on order. I guess a trip to an electrical warehouse might get me what am looking for.
co

[aghobby]

I use Crydom solid-state relay.Take a look at www.stepperworld.com clik on the link extras to see what is it.
It`s opto-isolated so no risk of blow your board.


Alex

[mintz]

digi-key part #Z193-nd 12volt dc switch contact 110v 15a Relay

[yukonho]

Mintz, you got me all excited. Unfortunately that is a 12 volt coil, I need 5V coil.
I like the shaft couplers at stepperworld, anyone have experience with them? Are they sloppy or tight?
co

[Al_The_Man]

CO, Its looks like you may have to go with a printed circuit type relay after all, I could not find any 5v with terminal connection.
Omron has a PC type G2R1-DC5 10amp contact, available from Electrosonic for Can$5.10, Electrosonic has an office in montreal.
Al

[yukonho]

Thanks for that.
co

[strat]

check with any electronic suppliers around your town i used an NTE RS3-1010-51R SSr 10amp rating origanally started with a dremal but bumped up to a craftsman rotozip copy has like a 5amp rating on the motor used pin 1 for the control with turbocnc you might look on xylos fourm too i think theres some info on it

[Jerry Dots]

stepperworld.com,extras page has a relay for $22 is what I use. 5 volt logic will drive it.