6 axis force/torque sensor is also called 6 axis F/T sensor or 6 axis loadcell, which measures forces and torques in 3D space (Fx, Fy, Fz, Mx, My and Mz). The multi-axis force sensors are used in many fields including automotive and robotics. The force/torque sensors can be divided into two groups:
Matrix-Decoupled: The forces and moments are obtained by pre-multiplying a 6X6 decoupling matrix to the six output voltages. The decoupling matrix can be found from the calibration report supplied with the sensor.
Structurally Decoupled: The six output voltages are independent, each of which represents one of the forces or moments. The sensitivity can be found from the calibration report.
To select a right sensor model for a particular application, one should consider the following factors
1. Measurement Range
The maximum forces and moments that are possibly applied to the subject need to be estimated. Special attention should be paid to the maximum moments. Select a sensor model with capacity of about 120% to 200% of the possible maximum loads (forces & moments). Note that the overload capacity of the sensor cannot be considered as typical “capacity”, since it is designed for accidental usage when mis-handling.
2. Measurement Accuracy
Typical SRI 6 axis force/torque sensor has nonlinearity and hysteresis of 0.5%F.S., crosstalk of 2%. The nonlinearity and hysteresis are 0.2%F.S. for high accuracy model (M38XX series).
3. External Dimensions and Mounting Methods
Select a sensor model with as large dimensions as possible. Larger force/torque sensor typical provides higher moment capacity.
4. Sensor Output
We have both digital and analog output force/torque sensors.
EtherCAT, Ethernet, RS232 and CAN are possible for digital output version.
For the analog output version, we have:
a. Low voltage output – the sensor output is in millivolt. An amplifier is required before data acquisition. We have a matching amplifier M830X.
b. High voltage output – embedded amplifier is installed inside the sensor
Regarding low or high voltage output sensor model, the analog signal can be converted into digital by using the interface box M8128/M8126, with EtherCAT, Ethernet, RS232 or CAN communication.
SRI Sensor Series
6 Axis F/T sensor (6 axis Loadcell)
· M37XX series: ø15 to ø135mm, 50 to 6400N, 0.5 to 320Nm, overload capacity 300%
· M33XX series: ø104 to ø199mm, 165 to 18000N, 15 to 1400Nm, overload capacity 1000%
· M35XX series: extra thin 9.2mm, ø30 to ø90mm, 150 to 2000N, 2.2 to 40Nm, overload capacity 300%
· M38XX series: high accuracy, ø45 to ø100mm, 40 to 260N, 1.5 to 28Nm, overload 600% to 1000%
· M39XX series: large capacity, ø60 to ø135mm, 2.7 to 291kN, 96 to 10800Nm, overload capacity 150%
· M361X series: 6 axis force platform, 1250 to10000N，500 to 2000Nm, overload capacity 150%
· M43XX series: ø85 to ø280mm, 100 to 15000N, 8 to 6000Nm, overload capacity 300%
Single Axis Force Sensor
· M21XX series, M32XX series
Robot Joint Torque Sensor
· M2210X series, M2211X series
Loadcell for Auto Durability Test
· M411X series, M341X series, M31XX series