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What are the parts of a step motor?

By Rachel Hill |

What are the parts of a step motor?

The last part of this series focuses on troubleshooting the electronics of step motors. To drive a stepper you need four main parts: a CPU, controller, sequencer, and a driver (figure 1). Fig. 1-Driving a step motor requires four parts: a CPU, controller, sequencer, and a driver. The CPU will coordinate all functions of the device.

What happens to a step motor when stopped?

They burn up. An important characteristic of the step motor is that it can maintain the holding torque indefinitely when the rotor is stopped. If a step motor stalls out, it is unlikely that it will burn up as with most ac and dc motors.

How often do bearings break on step motors?

Still, this is not a common problem. The bearings in most inexpensive motors are rated at 3000 hours or more, and most high-end quality motors are rated at 90,000 to 100,000 hours. The technician breaks them. This is the most common cause of failure for step motors.

How can you tell if a step motor is energized?

It can be noticed by turning a step motor by hand and is generally about one-tenth of the holding torque. In a typical one-phase step sequence for a two phase motor, phase A of a two-phase stator is energized (Step 1).

The last part of this series focuses on troubleshooting the electronics of step motors. To drive a stepper you need four main parts: a CPU, controller, sequencer, and a driver (figure 1). Fig. 1-Driving a step motor requires four parts: a CPU, controller, sequencer, and a driver. The CPU will coordinate all functions of the device.

They burn up. An important characteristic of the step motor is that it can maintain the holding torque indefinitely when the rotor is stopped. If a step motor stalls out, it is unlikely that it will burn up as with most ac and dc motors.

Still, this is not a common problem. The bearings in most inexpensive motors are rated at 3000 hours or more, and most high-end quality motors are rated at 90,000 to 100,000 hours. The technician breaks them. This is the most common cause of failure for step motors.

How to test if a motor armature is damaged?

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