In order to meet the demand of more strict position information, the common solution is to add incremental rotary encoder to brushless DC motor. Usually, in addition to Hall effect sensors, incremental encoders are added to the same control feedback loop system. The Hall effect sensor is used for motor commutation, while the encoder is used for tracking position, rotation, speed and direction more accurately. Because the Hall effect sensor only provides new position information when each hall state changes, its accuracy is only six states per power cycle, while for bipolar motor, it is only six states per mechanical cycle. Compared with the incremental encoder (which can decode four times the number of state changes) with resolution of several thousand PPR (pulses per revolution), the necessity of both is obvious.

Application		Servo motor、high-end CNC machine tools
Feature		high resolution、various shaft diameters available、can provide line-saving output、dustproof design、strong anti-interference
Model	［unit］	ZKD-56A-250BM/4P-G05L
Mechanical parameter
Dimension	［mm］	φ48*33
Shaft type		Hollow shaft
Shaft size /aperture	φ［mm］	Cone shaft9
Max. rotate speed	［r/min］	6000
Max. shaft load Axial / Radial	［N］	10/10
Operating temperature	［℃］	-30～+85
Protection level		IP40
Connection type		Spring Plate
resolution	［P/r］	2500
Electrical parameter
Output pattern		Line driver
Supply voltage	DC［V］	5
Response frequency / Response rate	［KHz］	350
Optional