Eastey TT Series, User Manual

Page: 21 / 34

Adjustments 21
Minimum Speed Trimpot (MIN)
The MIN trimpot sets the minimum speed of the motor when the main
speed dial potentiometer is set fully counterclockwise. The MIN trimpot
has been factory set to 0% of the base motor speed. To increase the
minimum speed, adjust the MIN trimpot clockwise. To decrease the
minimum speed, adjust the MIN trimpot counterclockwise.
Note: Readjusting the MIN trimpot will affect the maximum speed
setting. Therefore it is necessary to readjust the MAX trimpot
if the MIN trimpot has been adjusted. It may be necessary to
repeat these adjustments until both the minimum and
maximum speeds are set to the desired levels.
Acceleration Trimpot (ACCEL)
The ACCEL trimpot allows for a smooth start over an adjustable time
period each time the AC power is applied or the main speed dial
potentiometer is adjusted to a higher speed. The ACCEL trimpot has
been factory set to two (2) seconds, which is the amount of time it will
take for the motor to accelerate to full speed. To increase the
acceleration time, adjust the ACCEL trimpot clockwise. To decrease
acceleration time, adjust the ACCEL trimpot counterclockwise.
Deceleration Trimpot (DECEL)
The DECEL trimpot controls the amount of ramp-down time when the
main speed dial potentiometer is adjusted to a lower speed. The DECEL
trimpot has been factory set to two (2) seconds, which is the amount of
time it will take for the motor to decelerate from full speed to zero speed.
To increase the deceleration time, adjust the DECEL trimpot clockwise.
To decrease the deceleration time, adjust the DECEL trimpot
counterclockwise.
Note: The deceleration time cannot be set to less than the natural
coast time of the motor and actual load.
Current Limit Trimpot (CL)
The CL trimpot sets the current limit (overload), which limits the
maximum current (torque) to the motor. The CL also limits the AC Line
inrush current to a safe level during startup. The CL trimpot is factory
set to 1.5 times the full load rating of the motor. To increase the current
limit, adjust the CL trimpot clockwise (do not exceed 2 times the motor
current rating (maximum clockwise position). To decrease the current
limit, adjust the CL trimpot counterclockwise.
To Recalibrate the Current Limit (CL) Trimpot
1. Disconnect the AC power and connect a DC ammeter in series with
either motor armature lead. (Note: If only an AC ammeter is
available, connect it in series with either AC line input lead.)
0
30
2 0.2
10
2 0.2
10
0
200
150