1 From the perspective of moving distance, if the 2000mm stroke is driven by a lead screw, the cost may be too high because of the length of the lead screw, and the deformation of the lead screw must also be considered.
If racks and pinions are used, the accuracy may be limited, and factors such as noise and wear will be difficult to overcome.
If the linear motor is used, the accuracy requirement of 0.02mm is not high, and the domestic linear motor and ordinary magnetic grating ruler can completely meet the requirements.
Reasons for adopting magnetic grating ruler
1 is relatively cheap.
Because of the large pitch (low resolution), the linear motor can move faster.
Of course, the specific selection should carefully consider the application situation, such as whether there is iron filings, and if there is, it is necessary to protect the motor and the magnetic grating ruler. If the motion is vertical, linear motor is not the best solution, because the safety of power failure should be considered.
If the explanation is not clear, please continue to communicate and ask.