Torque sensors for robotic joints

Futek app316

Reaction torque sensors are often used to monitor the torque output in order to ensure that the robot arms maintain a smooth and steady motion.

Versatile and adaptive robotic armatures can increase manufacturing productivity by automating and performing complex, repetitive tasks 24 hours a day, seven days a week.

These arms are often designed to be trainable or operate as a team as cooperative robots (cobot/co-robot). Driving these arms in their joints are servo or stepper motors. In addition to monitoring shaft position, these arms need to monitor torque output for smooth, steady motion. By combining these motors with a reaction torque sensor, control loops can be developed for smooth, autonomous operation.

As seen in the attached conceptual diagram a TTF Series reaction torque sensor is mounted between the robot arm servo motor and it’s mounting points. The sensor then measures the torque outputted during arm movement which is amplified by the IAA Series or IDA100 amplifier. The amplified signal is then sent to the PLC or robotic arm controller, providing precision feedback and closing the control loop. Additionally, with the IDA100, amplified output from the sensor can be monitored and analogue amplifier settings can be adjusted digitally with Futek’s Sensit aoftware.

A Futek Sensor from TTF Series Reaction Series combined with a Servo Motor provides the smooth and steady motion in robotic armatures where complex repetitive tasks are required.