Name: Smartrise C4
Brand: Smartrise
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C4 User Manual

9.8.1 Pre-Torque Adjustments

For jobs with the Smartrise serial load weighing device (LWD), load information can be used to

provide pre-torqueing of the motor to accommodate for load changes and prevent rollback. See

C4 Load Weighing Device for calibrating the LWD. If the configuration at the job site is using the

Omega LWD, see the Omega Load Weighing Device User Manual for calibrating the LWD.

9.8.2 Brake Adjustment

Brake adjustments can be done to allow for rollback control using slow picking of the brake.

Increase the brake ramp time in the Brake Setup menu to allow for slow picking of the brake

and for the sheave to move under the brake. See section 6 Brakes to adjust the brake.

Brake pick delay in the run timers can also be increased to allow time for the drive to hold the

car at zero speed.

9.8.3 Synthetic Speed Torque

Adjust the value of the MIN ACCEL Speed in the Speed menu to a value between 2 and 4 to

overcome rollback. Use this in conjunction with the brake adjustments for best ride quality. The

Min Releveling Speed value might also need to be adjusted. Force the car to relevel to verify no

roll back occurs during releveling operation.

NOTE: This speed is applied instead of 0 speed at the beginning of the run. While it will help

overcome rollback, it also causes the car to jerk forward when traveling in the direction of least

resistance.

9.9 Adjusting Run Timers

Start and end run timers are used to maximize the quality of the run for each car. The run

timers may need to be adjusted depending on the start and stop sequence.

Acceleration Delay – Delays the pattern and holds the car at the min acceleration speed. This

value can be increased to allow for the drive to generate pre-torque for motor control or can be

set lower to lower start of run delay.

The adjustment range is from: 0 – 65535 ms.

• Default = 100 ms on Automatic Operation and 0 ms on Inspection Operation

• Units of Measure: ms

Smartrise C4 User Manual

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