Name | Material | Description |
---|---|---|
ERF Resistive Element Electrodes | Aluminum | Supply the necessary electric field to activate the ER fluid |
ERF Resistive Element Case and Lid | Nylon | Housing of the ERF and electrodes |
Power Trans. Shaft | Aluminum | Output shaft of ERF resistive element; Coupled to gear system; Optical Encoder shaft |
Handles | Garolite | Haptic interface for the patient |
Gear System | Brass | Multiplies the ERF resistive torque |
Bearing | Plastic | Aligns the ERF case and gearbox |
Plain Bearing | Brass | Aligns the electrodes; An electrical contact for the rotating electrode |
Transmission Bracket | Aluminum | Rotates with ERF housing; Transmits hand force to gearbox |
Seals | Teflon® | Prevents leakage |
Screws, nuts, and washers | Plastic and Brass, | Fastener |
Optical Encoder | Plastic | Renco Low-Profile Encoder with 1024/revolution resolution; Measures position, which is used to calculate velocity and acceleration |
Force Sensors | Aluminum | FUTEK Load Cells, 10 lb Measures resultant torque of the ERF resistive element |