Lot of ideas here...
You might compare your motor field voltage, and generator field voltage, and armature voltage with a good running car, to see if anything's amiss.
Is it always long in the up, short in the down? (empty car) Could be weak compounding. Or overly strong compounding, if opposite. (Long down, short up)
Does this selector have an advancer panel, +SLS cams, to drop out the speed switches on slowdown? If there is no consistent pattern, and it's just "all over the place", it may be suffering from years of people shooting from the hip, bending pie plates, moving LV ring brushes around indiscriminately, etc. You might uncouple the tape sheave drive, and rotate the gear drive into the middle floor in both directions, counting the degrees on the vernier, as each SLS switch opens up. The actuation of switches, brushes in each direction should be symeterical in both the up, and the down, generaly. The floorbars themselves could even be in the wrong position, affecting the GK wing and the motor field strengthening in slowdown. I always like to compare to a good car.
Last edited by Vic; 04/26/11 04:23 AM.
