For applications that require S-curve acceleration and deceleration ramps, Applied Motion servo drives offer an easy-to-use jerk filter. The jerk filter is set in Hertz within Quick Tuner™, Applied Motion’s servo configuration and tuning software. It can also be set with the SCL command KJ. The lower the Hertz value the more pronounced the S-curve profile will be.
S-curve acceleration/deceleration ramps are beneficial in positioning systems where instantaneous changes in speed may cause the load to jerk excessively. One example is when the load is connected to the motion actuator via a long moment arm. If the arm is not sufficiently rigid, changes in speed at the actuator can result in undesirable oscillations and increased settling time at the load. Smoothed transitions in speed changes, such as those provided by the jerk filter in Quick Tuner™, can alleviate this unwanted motion and reduce settling time.
The jerk filter and accompanying S-curve move profiles are available on Applied Motion’s line of SV7 servo drives.