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Slowing down an AC motor with an SCR

What I'm wondering about it the torque. If say I slow down our bandsaw by 25% would the torque decrease or stay the same. I'm using a bandsaw to cut brass and have slowed it down with an idler pulley and its just fine but occasionlly I need to cut material a bit harder and its wearing the blades. I'm using 1/16 blades and they don't take running hot too well. I want to be able to switch to my SCR circuit and dial the speed I want when I have to cut this other material. Ken

Reply to
clannorm
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Burning out the windings of an AC motor with an scr is a more apt title.

Reply to
bamboo

Many bandsaws use what are called squirrel cage AC motors. These are not amenable to speed control, whether by SCR or any other method. If you have a small bandsaw whose motor has brushes on it like a drill motor, then you may be able to speed control it, because it actually isn't an AC motor at all, it's a DC motor which is universally wound.

I take it you want to slow down the bandsaw's cutting speed to cut steel?

GWE

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Reply to
Grant Erwin

i take it you want to slow down the bandsaw's cutting speed to cut steel? No German Silver which needs to be 25% slower on our machine. Maybe I need to find another motor thats laying around here

Reply to
clannorm

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