there is a pattern, as the car will run down when the car is in the bottom 2/3 of the hoistway. also it will run up, but at a higher rate then the down. if i start at the bottom, the car will run all the way up at about 25 fpm, it is only at the upper 1/3 of thehoistway that the car will start to not be able to pick up cwt and run down.
im not sure about the open or closed loop operation, if i do the velocity test at 5 fpm, then the car will run in both directions at 5 fpm no matter where it is in the hoistway. this is why I'm thinking maybe on inspection it is running open loop. there are a couple of adjustable resistors in the generator field circuit that are in play when ux and dx are not energized. the output of the scr pack goes thru these resistors when ux and dx are not energized. again I'm not sure about the operation of the motor control under inspection, i can't find any info on how to adjust. i thought it may be load weighting, but the load weigher is functioning, the tool does recognize different weights in the car. when the car is empty the load is displayed as 0 . i don't believe i am just drifting up, as it does seem as it is under control, again it will run the same speed all the way up, thinking maybe a problem with the generator. going to go back and check for grounds in the loop. after thinking about it awhile, maybe I'm getting a ground, although usually when you get a good ground in the loop, the loop fuse will blow, or the loop breaker will blow, maybe it is a high enough ohm ground that it is not blowing the fuse or breaker. there are some load weighing adjustments and gain adjustments on the amplifier board, but i did not want to start tweaking them, as the car runs fine on normal.
