What is "Performance Matching of brakes or clutches ?

Performance Matching is the electronic adjustment of the DPS device control signal to the corresponding current output. After matching, the brake or clutch, will perform alike at any point along their Torque-Current curve - with high accuracy. Contrary to electronic matching, the mechanical matching of hysteresis brakes can be performed only at one point of the Torque-Current curve - although with a rough accuracy of 4-10%.Due to the variability of magnetic materials, a coils resistance, components, and manufacturing tolerances, the electromagnetic particle and hysteresis brakes and clutches cant meet the needs of critical tension control processes without a closed loop control. They simply dont perform the same. In many processes that require multiple pay-offs, the individual control of each pay-off must utilize sensors for feedback, which isnt economical. Therefore, matching of brake/clutch performances is an ideal solution. In some applications it is very desirable to match ...  more