GeorgeSelinsky Posted January 14, 2005 Share Posted January 14, 2005 Here we're looking at the inside half of the speed regulator of the variable speed motor. Can anyone tell me what kind of electronic device this is? Is it a resistance device or something else? I gather the way it controls the speed is by increasing or decreasing the DC voltage supplied to the motor. - G. Link to comment Share on other sites More sharing options...
Guest Sean McVeigh Posted January 14, 2005 Share Posted January 14, 2005 It's a high-current power resistor, hence it's size. I believe it ranges from something like 2 ohms through to 5 or 10. The wiper arm is that cute spring-loaded fellow in the middle that is connected to the rotating bottom cap. You could essentially call it a "heater" if you'd prefer :) Link to comment Share on other sites More sharing options...
Rob Belics Posted January 14, 2005 Share Posted January 14, 2005 That's what it looks like to me. The tip of the contact would be what slides across the other points varying the resistance. You might be able to check this with an ohmmeter by measuring from that point to either side of the circle. It would vary as you turned it. It would also be a higher resistance on one side compared to the other unless you had it dead center. Link to comment Share on other sites More sharing options...
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