Sanyo Denki Unveils Compact High Torque Stepper

Sanyo Denki has expanded its Sanmotion F motor line for industrial applications requiring small size, precise positioning, and higher torque. These motors are well-suited for semiconductor manufacturing, conveyor robots, mounting machines, and medical equipment. They help improve positioning speed and motion stability, thereby increasing throughput. The new models deliver up to 70% more torque than previous Sanmotion F5 versions and also reduce vibration and positioning errors.

Sanyo Denki's latest Sanmotion F 5-phase stepping motor lineup aims to boost torque density while reducing vibration and positioning errors. Image used courtesy of Sanyo Denki

High Torque Targets Faster Machine Cycles

One of the main upgrades in the new Sanmotion F series is a big increase in torque compared to the motor's size. The redesigned 5-phase motors from Sanyo Denki can provide up to 70% more torque than earlier models in the same family. This extra torque helps the motor accelerate faster and reduces the time needed for positioning. The new motors are available in different sizes and torque options to fit a range of motion needs.

The series comes in square frame sizes of 28 mm, 42 mm, and 60 mm, with holding torque ratings from 0.062 Nm to 2 Nm, depending on the model and current setup. The 42 mm models offer up to 0.54 Nm of torque, while the larger 60 mm models can reach 2 Nm. With rated currents up to 2.8 A per phase, these motors can be used in both compact positioning systems and more demanding indexing or conveyor tasks. This flexibility lets machine builders maintain high performance while making actuator assemblies smaller. In some cases, a smaller motor with higher torque can simplify mechanical design and reduce the equipment's overall size.

Compact Design Supports Smaller Equipment

The new stepping motors are designed to take up less space and weigh less. Compared to earlier Sanmotion F5 models, the motor length is up to 10% shorter and the mass up to 8% lower. These changes make it easier to fit the motors into compact machines with tight spaces, and the lower weight can help moving parts respond faster during high-speed positioning.

The new Sanmotion F models enable more precise automation, useful in industries such as semiconductor manufacturing. Image used courtesy of Adobe Stock

Reducing the size and weight of the motor is important for precision automation, where vibration can affect alignment, consistency, or surface quality. Tools such as semiconductor manufacturing equipment and pick-and-place systems require stable, low-vibration motion for repeatable, high-speed tasks. The new motor also reduces stepping-position errors by 44%, improving accuracy and helping prevent alignment drift in indexing systems and robotic positioning stages.

Compact Motion Systems Continue to Increase in Performance Density

As industrial automation moves toward smarter machines with faster speeds and greater accuracy, the updated Sanmotion F series shows how higher torque and smaller size are becoming standard for high-performance, compact automation equipment.