LEESON FHP Series NEMA 4x Variable Speed Drive - Manual (Page 45)

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2. Set the speed adjust potentiometer or reference
signal to minimum speed (full CCW) and note the
time the motor takes to decelerate to minimum
speed.
3. If the deceleration time differs from the desired time,
adjust the DECEL trimpot until the desired time is
reached. Rotating the DECEL pot CW increases
the deceleration time.
BOOST
The BOOST trimpot is used to increase motor torque at low
speeds. The minimum setting is sufficient for most
applications and does not need to be adjusted. If the motor
stalls or runs erratically at very low speeds (below 10 Hz),
the boost trimpot may need adjustment.
1. Run the motor at the lowest continuous frequency/speed
required.
2. Monitor the motor phase current (with a true RMS
meter) while very slowly turning the BOOST trimpot CW
until the motor operates properly, or 100% of the motor
nameplate current is reached.
NOTE: Use the absolute minimum amount of BOOST
necessary to achieve proper motor operation. Improper
use of the BOOST feature may cause motor and/or
drive overheating and failure. If proper motion
operation cannot be achieved with the above