In principle, should according to load condition to select step-motor. All the load on the motor shaft has two kinds, namely damping torque and inertia load. Both load to calculate correctly, its value should meet the following conditions: (1) when the machine tool for no-load operation, in the whole speed range, add on the shaft of the stepper motor load torque should be within the scope of the continuous rated torque motor, which should be in the torque speed characteristic curve of the continuous workspace. (2) the maximum load torque, load cycles and overload time are offering within the permitted scope of characteristic curves. (3) in the process of acceleration/deceleration torque motor should be in deceleration area (Or intermittent workspace)Within. (4) to require frequent, braking and periodic change of load, it must be checked for torque RMS values in a cycle. And should be less than the continuous rated torque of the machine. (5) plus inertia load on the motor shaft size and sensitivity of the motor for the whole step will affect the precision of the system. Usually, when the load is less than the motor rotor inertia, the impact is not big. But when the load inertia reach or exceed 5 times of rotor inertia, can make the sensitivity and response time are affected by a lot of. Make even step into the amplifier can't work in normal adjustment range. So for this kind of moment of inertia should avoid to use. For more details, please visit: WWW. bohongmotor。 Com the main products: stepper motor, brushless motor, servo motor, stepping motor drive, brake motor, linear motor and other kinds of models of the stepper motor, welcome to inquire. Telephone: