1. Subdivision drive, select high performance driver chip.
The subdivision drive is the most commonly used and simplest way to reduce the vibration noise of the stepper motor. The main function of the subdivision drive is to make the stepper motor run smoothly, but when running at speeds below 60rpm, often the stepper motor running smoothly after the subdivision drive is still not very good, so we can consider other improvement measures. German TMC chip has silent chopper drive technology, you can change this better performance drive chip to improve the noise level.
2. Select a better quality stepper motor.
One of the characteristics of the stepper motor is that the precision of parts processing directly affects the motor vibration noise level. Stepping motor in order to obtain a greater torque output capacity, rotor and stator clearance is very small, stepping motor parts processing accuracy directly affects the stepping motor vibration noise level. In addition, the performance of the silicon steel sheet and the stepper motor product structure also affect the stepper motor noise level, and the level of the production process also affects the stepper motor noise level. Shinano has more than one hundred years of experience in production and management, and the investment in equipment in a factory in Dongguan is more than 2 billion RMB. High-precision equipments and molds ensure the processing accuracy of parts, and some series of products, such as the 43D series of stepping motors, are also specially designed to achieve low-noise effects.
3. Stepping motor selection is reasonable, to avoid *** vibration zone.
This is a stepper motor distance frequency diagram, you can clearly see the stepper motor low-speed zone is more likely to occur *** vibration, which causes the stepper motor with the ability to reduce the load. The high inductance motor is equivalent to the low inductance motor is less prone to *** vibration, even if *** vibration, the degree of vibration noise will be lighter. Therefore, matching reasonable parameters for reducing or avoiding the noise caused by *** vibration area is a good effect.
In the stepper motor with a gearbox can improve the working speed of the stepper motor, or with a gearbox motor to adjust the reduction ratio, but also to avoid the *** vibration zone. If you increase the gearbox, the cost tends to increase a lot, and the gearbox has a backlash, you need to make sure that the gearbox backlash has no effect on the use or there are other ways to eliminate its impact.
4. Use physical damping.
Some occasions, through the above ways are not good to improve the effect, such as medical infusion pumps, because the working speed range is very wide, must be in some speed interval is *** vibration zone, thus causing relatively large noise, and this equipment is generally used in intensive care unit, near the body of a very weak patient, the requirements of the noise is very low. After taking the above noise reduction measures the effect is not ideal, this time you can consider the use of shock pads this physical shock absorption to further reduce the noise. In addition, you can also use the vibration ring to make the operation smoother, but the price is too expensive, few people choose.
5. Select a smaller step angle stepper motor.
The two-phase stepper motor with a step angle of 1.8 ° motor replaced by 0.9 °, the noise will generally improve, the same two-phase stepper motor replaced by a three-phase stepper motor or five-phase stepper motor, the noise is generally also improved, but usually increase the cost, not only increase the cost of the motor will increase the cost of the driver, the drive to do their own customers to change the circuit involves time and economic costs. All need to be considered comprehensively.
6. Selection of stepper servo motor.
The ordinary stepper motor into a stepper servo motor will also improve the noise of the stepper motor, but the cost of stepper motors and drivers will increase, stepper servo motors because of the need for encoders, the overall body becomes longer, the installation of the size of the space should also be considered.