Improved torque and position deviation detection for stepping motors. Installation of reducers, brakes, and encoders

Example of customizing a stepping motor: Stepping motor with reducer, brake, and encoder

Purpose and benefits of attaching a reducer to a stepping motor

Figure: Stepping motor with reducer

Increase the torque

The torque characteristics of the output shaft can be improved by using a reducer.
For example, if a 1/10 reducer is attached to a motor, the rotation speed will be 1/10, but the torque will be 10 times higher. This allows the motor to provide adequate power even in applications that require large torque.

Purpose and benefits of adding a brake to a stepping motor

Figure: Stepping motor with brake

Improved safety

In applications where there is a risk of the lift axis falling due to gravity, a holding brake is used to prevent the shaft from falling.
By adding a non-excitation brake (a brake that activates and stops movement when there is no power) to the motor, it is possible to hold the motor in position when stopped and prevent it from falling.

Purpose and benefits of attaching an encoder to a stepping motor

Figure: Stepping motor with encoder (cable type)

Figure: Stepping motor with encoder (connector type)

Misalignment detection:

A stepping motor usually has the characteristic of moving forward a specified number of steps, but if the load fluctuation or the effect of friction becomes large, the motor may become misaligned (lost synchronism). In order to detect this misalignment (lost synchronism), it is effective to combine it with an encoder.

Example 1: Stepping motor with brake and encoder improves the performance of semiconductor manufacturing equipment

Device

• Semiconductor Manufacturing Equipment

assignment

• We want to improve the performance of our equipment when releasing a new model.
• I want to position it accurately
• Want to prevent workpieces from falling

Solution

• To achieve high speed and high precision positioning, the motor was replaced with a 5-phase stepping motor.
• Customization with an encoder for position detection
• Customized brake installation for fall prevention

Example 2: Stepping motors with gear reducers improve the performance of food machinery

Device

• Food Packaging Machinery

assignment

• I want to improve positioning accuracy by reducing backlash during forward/reverse rotation.
• Reducer gears wear out quickly, so we want to extend the life of our equipment.

Solution

• Proposal of optimal low-backlash gears and flexible customization

Case 3: Using stepping motors with encoders in agriculture

Device

• Fruit harvesting robot

assignment

• We want to use robots for efficient harvesting.
• I want to pick the fruit without damaging it

Solution

• Customize your encoder installation
• The upper system detects misalignment and can safely stop the machine without damaging the fruit.

Case 4: A compact stepping motor with an encoder enables the development of compact, quiet, and step-out-free medical equipment

Device

• Medical equipment

assignment

• I want a small, quiet device.
• We want to create a device that prioritizes safety.

Solution

• We offer low-noise two-phase stepping motors that meet motor size and torque requirements.
• Prevents misalignment by installing a customer-specified encoder

We are good at customizing stepping motors.

Please feel free to contact us about any issues you may have with customization.
We can proactively propose functional improvements based on our extensive customization know-how.
SANYO DENKI CO., LTD. 's customization will help you improve the competitiveness of your equipment.

*Customization may be subject to conditions such as minimum lot size. Please contact us for details.

Cooperation: SANYO DENKI CO., LTD. Sales Headquarters Servo System Business Group