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Curtis enAble
®
40-Series Manual, Rev. B
5 — PROGRAMMABLE PARAMETERS: Motors & Brakes Parameters
MOTORS & BRAKES MENU
PARAMETER RANGE DESCRIPTION
Auto-Trim On/Off Enables/disables the patented Auto-Trim feature; see page 4.
Motor Trim -127 – +127 Sets the motor trim, allowing for straight line tracking despite
differences in motor characteristics. Setting this parameter to zero
provides no steering correction.
System Resistance 0–477 Sets the actual system resistance (motor + brushes + wiring +
connections) used for load compensation and speed estimation. It is
important that the value set here is taken directly from the Motor Test
described below.
Hot System Resistance 0–477 Sets an estimate of system resistance when the motors are hot.
Initially, set this parameter at about 10% higher than the System
Resistance parameter. If ramp performance degrades with hot
motors, run the Motor Test described below while the motors are hot,
and use the result as the value for this parameter.
Motor Current Rating 0–90 A Sets the level to which the motor current will cut back if the motor’s
thermal protection threshold is exceeded.
Time at Max Current 0–120 sec Sets the estimated time that the motor can withstand maximum drive
current before overheating.
Motor Cutback Gain 0–100 % When the motor overheats, the drive current is cut back until it
reaches the programmed Motor Current Rating. The Motor Cutback
Gain determines how quickly this cutback will occur, once the Time at
Max Current has expired.
Gear Soften 0–100 % Gear softening allows smoother transitions between forward and
reverse and is more noticeable when the chair is tuned aggressively
(i.e., with extremely fast accel/decel rates and max speeds).
A gear softening value of 100% provides maximum softening,
and a value of 0% eliminates the feature.
Single Brake Drive On/Off Allows using only the M1 brake output to drive two 12V brakes in
series.
Brake Turn-On Voltage 12–24 V Sets the initial voltage of the brakes when they first turn on. Set this
parameter to match your brakes.
Brake Cutback Voltage 6–24 V Sets the level to which the brake coil voltage will be reduced after
approx. 1 sec at full battery voltage. This feature saves power and
prevents overheating.
Brake Delay 0–1.0 sec Sets the length of the delay between when zero speed is detected
and the brakes are set.