6A.4 Brake Adjustment - O. Thompson Microflite Ultra 2000 Installation & Adjustment Manual

Microflite Ultra 2000 - Magnetek DSD 412 DC Drive
8. Place the car somewhere near the center of the hoistway. On the Limit board, LED D9
should be turned off. It will come on when the car is on Automatic operation with the doors
closed.
On the Limit board, press S3 and then press and release S1. Release S3. LED D25 will
9.
be blinking rapidly (on 1/8 second, off 1/8 second). Also, the D10, D11, and D17 LED's
will be lit.
10. Run the car up on inspection about 5 feet. With the car running, press and release S3.
D10 should turn off. If D11 turns off and D10 stays on this is OK.
11. Run the car down on inspection about 5 feet. With the car running, press and release
S3. If D10 turned off in the previous step, D11 will turn off. D25 will now be on
continuously, indicating that the Limit board inspection learn procedure was done
correctly, and the board is now in normal operation.

6a.4 Brake Adjustment

Note:
The brake assembly and all pins should be cleaned thoroughly and all spring
tension set properly to hold 125% of car capacity prior to adjusting the brake
driver. Brake shoes should be checked to insure at least 95% surface contact. If
spring tensions are changed after this adjustment, the brake driver will need to be
re-adjusted.
1. Insure the brake coil has been connected properly to the controller.
Connect a meter across the F- and F+ terminals of the drive. Set the meter range high
2.
enough to measure the brake lifting voltage level for the job.
With no inputs on at the J1 terminal of the drive, the V/I-4 pot will be selected. Adjust
3.
the V/I-4 pot fully counterclockwise.
Turn the main line power OFF. TEMPORARILY place a jumper from J1-1 to J1-3 on
4.
the brake driver.
5. Turn the main line power ON. Run the car on inspection and adjust the V/I-1 pot until
brake pick voltage required for the job is obtained.
6. Turn the main line power OFF. Remove the jumper from the brake driver.
7. Turn the main line power ON. Run the car on inspection and wait until the LED over
the V/I-2 pot lights. Adjust the V/I-2 pot until approximately 60% brake lifting voltage is
obtained or the brake holding voltage previously measured. If the brake drops at this
level, stop the car, turn the pot clockwise 1 full turn, and attempt to run the car again.
8. While running the car, turn the inspection speed pot counterclockwise until the car runs
at approximately 8-10 fpm. Stop the car.
9. Remove the RL relay.
Revision: AA 2.2
(see drawing on following page)
Printed 03 - 15 - 03 6a - 7