Reliable Speed Feedback Solution: ABB 61156844 (YPH 108B) for Precision Automation

In a high-speed synthetic fiber spinning plant, dozens of individual motor-driven godet rollers must rotate at perfectly synchronized speeds, with variations of less than 0.01%, to maintain yarn tension and quality. The ACS800 drives controlling these motors were initially operating in open-loop scalar mode, leading to slight speed drift and product inconsistencies. By integrating the ABB YPH 108B 61156844​ speed measurement board into each drive and connecting it to a high-resolution encoder on each motor shaft, the system achieved true closed-loop vector control. The YPH 108B 61156844​ accurately translated the encoder’s pulse train into a precise digital speed feedback signal for the drive’s microprocessor. This upgrade resolved the speed drift issue, resulting in a 30% reduction in yarn breakage and a significant improvement in product uniformity, directly impacting yield and profitability.