Can you adjust a stepper motor?
Adjusting the current of a stepper driver is easy, just turn the small potentiometer with a tiny flat head screw driver. Be very careful though. Do not short your screw driver to any of the terminals of the stepper driver as you may cause damage to your stepper driver.
How do you stop a stepper motor from making noise?
One trick to reduce audible noise is by increasing the microstepping level and step frequency together, while maintaining the same motor speed. By selecting a microstepping level which places the step frequency beyond the audio band, quiet motor operation can be achieved.
How can I make my motor quieter?
Capacitors are usually the most effective way to suppress motor noise, and as such we recommend you always solder at least one capacitor across your motor terminals. Typically you will want to use anywhere from one to three 0.1 µF ceramic capacitors, soldered as close to the motor casing as possible.
What causes a stepper motor to chatter?
The principal source of these resonances is that the stator flux moves in a discontinuous way when you use a non-microstepping stepper motor driver — forty-five or ninety degrees at a time — causing a pulsing energy flow to the rotor, and these pulsations excite the resonance.
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 does error accumulate in a stepper motor?
The remarkable feature of steps motors, though, is that this error does not accumulate from step to step. When a standard stepper motor travels one step it will go 1.8° ± 0.05°. If the same motor travels one million steps, it will travel 1,800,000° ± 0.05°. The error does not accumulate. Stepper motors can respond and accelerate quickly.
When to reduce the current on a stepper drive?
But when the motor idles, or holds position, it requires much less torque. These instances are a good time to reduce motor current. Most modern stepper drives do this automatically. For example, the drive might reduce idle current to 50% of the running current.
How can I reduce the temperature of my step motor?
Continue making adjustments until the motor mispositions or stalls. Then slightly increase the current so the motor resumes accurate positioning. In some cases — especially when a step motor is oversized for an application — the engineer can reduce running current enough to measurably reduce the temperature of the motor.
