6C.4 Initial Hoist Motor Field Adjustment - O. Thompson Microflite Ultra 2000 Installation & Adjustment Manual

6c.4 Initial Hoist Motor Field Adjustment
Note:
The following settings will need to be touched up during the high speed
adjustment.
We will refer to Standing Field as the field current when the car is sitting at the floor with the
doors fully open, or when it is parked. We will refer to Full Field as the field current when the
car is accelerating or leveling into the floor. We will refer to Run Field as the field current
required to allow the car to reach contract speed without exceeding the rated armature voltage
and current by more than 10% while lifting full load.
1. Insure the motor fields have been connected properly to the controller.
Connect a meter in line with the F+ terminal or an amp-probe around the F+ wire of the
2.
motor field driver. The meter or Amprobe should be large enough to handle the
amount of current that the unit can supply - unit ranges are 10, 20 and 30 amp.
3. With no inputs on at the J1 terminal of the driver, the V/I-4 pot will be selected. Adjust
the V/I-4 pot until standing field current is obtained.
4. Next, the field loss trip point can be set.
Note:
The field loss trip point is typically set at 80% of standing field current. (I.E. If
standing field current is 10 amps, field loss should be set to trip at 8 amps).
5. Calculate the field loss trip point for the job. (Standing Field Times .8)
6. Adjust pot V/I-4 for the proper field loss trip point.
If the REG relay de-energized while lowering the V\I-4 setting, continue to adjust the
7.
V/I-4 pot until the desired trip level is seen on the meter or amp-probe, Then turn the FL
pot counterclockwise until the REG relay just energizes.
8. If the REG relay remained energized while lowering the V\I-4 setting, slowly begin
turning the FL pot clockwise until the REG relay de-energizes. Then turn the FL pot
counter-clockwise until the REG relay re-energizes.
Set V\I-4 back up to the desired standing field current level.
9.
10. Turn the main line power OFF. Temporarily jump from AC2 on the controller to J1-1
on the driver.
Turn the main line power ON. Adjust the V/I-1 pot until full field current is obtained.
11.
12. Turn the main line power OFF. Move the end of the jumper connected to J1-1 to J1-2
on the driver.
13. Turn the main line power ON. Adjust the V/I-2 pot until run field current is obtained.
This setting will need to be adjusted again with the car running at contract speed with
full load.
Revision: AA 2.2
Microflite Ultra 2000 - Amicon Regulator
Printed 03 - 15 - 03 6c - 5