DRIVER VOLTAGE

The higher the output voltage from the driver, the higher the level of torque vs. speed. Generally, the driver output voltage should be rated higher than the motor voltage rating.

MOTOR STIFFNESS

By design, stepping motors tend to run stiff. Reducing the current flow to the motor by a small percentage will smooth the rotation. Likewise, increasing the motor current will increase the stiffness but will also provide more torque. Trade-offs between speed, torque and resolution are a main consideration in designing a step motor system.

MOTOR HEAT

Step motors are designed to run hot (50º-90º C). However, too much current may cause excessive heating and damage to the motor insulation and windings. AMS step motor products reduce the risk of overheating by providing a programmable Run/Hold current feature.