When wiring marine crane motor, do not build any motor control circuit on the winding or inserting prototype board. It is very important to use high frequency printed circuit wiring to prevent pulse jitter. Usually due to excessive noise at the input of the current detection sensor or error signal amplifier. Therefore, the printed circuit layout should have a ground surface with a small current signal and a high drive output buffer, and should return to the capacitance of the power input filter through separate channels. Whether it is necessary to connect a ceramic dielectric capacitance (0.01 uF) near the integrated circuit at the same input of VCC, Vref and error amplifier depends on the circuit layout. However, all high current circuits should be as short as possible, and heavy copper wire should be used to reduce EMI radiation as far as possible.