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

http://www.mouser.com/index.cfm?handler=displayproduct&lstdispproductid=446378&e_categoryid=156&e_pcodeid=52802

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

Originally posted by HomeCNC
http://www.mouser.com/index.cfm?handler=displayproduct&lstdispproductid=446378&e_categoryid=156&e_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).

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

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

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

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

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

Thanks for that.
co

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

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

Thanks everyone. I have looked a little for info on how to hook it up to the xylotex board, but honestly havent had much time to do it. If I cant source the one mentioned in Montreal I will get the one from stepperworld along with a few of those shaft couplers, anyone used them?
Was considering just hooking up a switch to the relay on the Z and setting it so when I get to a certain height the motor shuts off or goes on. That way I could have a standard Z height at the end of the run that would shut off the spindle. Much slicker to use the m3 and m5 though.
co

Well I went to a huge electronics warehouse today and picked up a relay. 5V coil and 125VAC 20A relay.
Question is, how do I hook it up?
There are 6 pins on the bottom, 4 on one end and two on the other. I am guessing that the two are the 5V input and the 4 are for the load.
Anyone give me a bit of guidance on this?
thanks
co

yukonho

If you are using Turbocnc, try looking at this site http://www.teilhardo.com/Spindle%20Control.html

I just completed the installation and it works great.

Marv