It is a TKE pedestal machine with a sheave jammer installed in 2003.

the crosshead mounted encoder is the position encoder. the velocity encoder will be in the machine room, either mounted on the end of the motor, or driven by a friction wheel on the driver. at least that's the way I have always seen them.

i put 500lbs in the car and vibration went away. when car is empty at bottom floor loadweigher says 0 but at top floor its says 38 percent. Makes sense if it thinks the car is heavy its not going to be trying too hard to slow it down. I also found the shackles appeared twisted (according to the antispin cable) and one was touching the crosshead so i reset them back which did cause a change in the loadweigher. its a thyssen loadweigher and i spent all day trying to adjust it but I dont have an IMS fast to verify count. Going to put balance load in tomorrow and measure current/attempt to adjust loadweigher. Is it possible i have a bad transducer or loadweigher board?

I replaced the capacitors in the drive and that solved the problem. I believe this is a TAC50 Drive. All vibration and rope slip went away. After testing the old caps I found 2 were not charging when polarity is reversed. Now she runs great.

Nice job troubleshooting.