I am putzing around building a tobacco shredder. Yeah, i'm a smoker and shred my own tobacco leaf - i don't grow it, just climbing the learning curve on rolling my own, then shredding unprocesed tobacco leaf was enough
I'm not that literate when it comes to things electrical - i started out in my employment life as an auto mechanic at a dealership back in the 60s, and am familiar with how relays work in general but they have always been 12V relays controlling a 12V circuit. I was actually hoping of using a honda starter relay to control a 120VAC solenoid but researching on the web, found that's not recommended.
The solenoid I want to use is 120V with a 26 watt current draw - below is the spec sheet
I can supply the relay with 12V DC, that's not an issue, (i was hoping to find a relay that was 120V AC on both circuits. I'm sure they exist but i couldn't find one - i did find a 12V relay that supports a 120V switching current. What i am hoping is that someone can confirm for me that the following relay is good to go for use with the solenoid above
Basically i'm an idiot when it comes to electrical stuff - i assume the "2A" switching current, if it does refer to the 120VAC switching voltage, that would mean my 26 watt draw is about 1/10th of the rated limit of the relay but would like to know before i spend $$ only to burn the solenoid or relay up.
the 2nd part of my question is, the relay indicates it's "normally open" or off. My shredder uses a rotating 10" diameter cast iron disc (what i call the cutting head) with 3 blades, one every 120 degrees.
The solenoid (push) will be operating a clamping foot or bar, that just as a blade approaches the cutting edge (think of a paper cutter), a sealed ball bearing, acting as a ground contact for the relay, will close the circuit and the relay will activate the clamping foot / bar. (to picture the ball bearing acting as a contact, picture one of those turn of the century "high wheel" bikes that had a 50" front wheel and a small 12" rear wheel - the bearing is the 12" wheel and it's in contact with the cutting head / wheel)
As the bearing will be in contact with the outer edge of the 10" cutting head, On the outer rim of the cutting head or disc, what i'm planning on doing is machining recesses for nylon strips that will isolate the grounding bearing when the clamping bar is not needed. THere's only 15 degrees or so where the clamping bar will be needed to hold or press the tobacco down while the blade is cutting, then the solenoid will release, and re-activate when the next blade approaches.
if the "normally open" relay is not going to work in that fashion, should i look for a relay is normally open? do those exist?
thanks in advance