Dan D
Well-known member
My idle started dropping under load and wouldn't maintain the 900rpm set in the eprom. Logger shows 120 trying to bring it up. I fiddled with the BISS to get the rpms up over 900 and the ISC counts went down to zero with no effect on the actual idle speed. The ISC is about two years old, purchased from DSMISC.
Next, I ohmed out the coils they check out at 40 ohms which is right on the money for the newer version ISC.
I pulled the ISC and hooked up a power supply. It draws current, but nothing moves.
I pulled it apart and the pintle freely spins. I tried winding it up and then putting it back together and applying power to the other coil to see if it would turn the other way - no dice.
Anyone had similar short lifespan on these newer version ISCs? If the coils are good and it draws the appropriate amount of current when excited, why wouldn't it turn? Does the rotor become demagnetized?
I have a very strong magnetizer here at work. Maybe I'll put the rotor on it and see if it comes back to life. I just have to figure out which pole is which.
Next, I ohmed out the coils they check out at 40 ohms which is right on the money for the newer version ISC.
I pulled the ISC and hooked up a power supply. It draws current, but nothing moves.
I pulled it apart and the pintle freely spins. I tried winding it up and then putting it back together and applying power to the other coil to see if it would turn the other way - no dice.
Anyone had similar short lifespan on these newer version ISCs? If the coils are good and it draws the appropriate amount of current when excited, why wouldn't it turn? Does the rotor become demagnetized?
I have a very strong magnetizer here at work. Maybe I'll put the rotor on it and see if it comes back to life. I just have to figure out which pole is which.