Magnetic ring encoderInstalled after the reduction gear, such as the shaft end of the winch wire rope drum or the shaft end of the last reduction gear, this method has no gear backlash, and the measurement is more direct and accurate. This method generally measures long-distance positioning. This type of malfunction has the highest probability of occurrence and is frequently encountered during maintenance, making it a priority consideration. usuallyMagnetic ring encoderIn case of cable breakage, short circuit or poor contact, the cable or connector needs to be replaced. Special attention should also be paid to whether the loosening caused by loose cable fixation leads to welding or circuit breaking. In this case, the cable should be clamped tightly. During operation, each pair of poles generates a cycle of sine and cosine signals, which are converted into orthogonal or serial position signals through hardware interpolators. When the motor shaft rotates, the magnetic field strength induced by the Hall element inside the chip remains constant within the radial range, and the radial vibration of the motor shaft does not affect the degree of the Hall induction output signal.

According to the reading method, encoders can be divided into two types: contact type and non-contact type;Magnetic ring encoderEach position of the measurement corresponds to a specific numerical code, so its indication is only related to the starting and ending positions of the measurement, and is not related to the intermediate process of the measurement. The midpoint of the north and south magnetic poles of the magnet, the center of the chip, and the center of the motor shaft end must be kept on the same straight line, as any installation error will reduce the accuracy of the encoder. However, in practical applications, not only is the radial vibration of the motor shaft unavoidable, but the deviation caused by the relative displacement of the chip and magnet can also affect the degree of the actual output signal. Coaxial design requires high magnification interpolation from one cycle to the maximum final resolution. Once the speed exceeds a certain range, it is impossible to accurately read the position information point by point, resulting in a decrease in the accuracy of the actual output. For the above reasons, coaxial magnetic encoders have long been concentrated in relatively low-end application fields.