Otto Bock SensorHand Speed 8E38-8 Manual page 36

Control with one electrode and one switch
Proportionally controlled by the OPENING electrode.
Opening:
At constant speed by operation of the MyoBock switch.
Closing:
Control Mode 2: AutoControl – LowInput: One electrode and one switch
Opening
Sustained electrode signal
Speed: Proportional
Control with one switch
This control mode can be used with any MyoBock switch.
At constant speed, as long as the OPEN-side of the switch is operated. The hand remains open.
Opening:
At constant speed by operating the CLOSE-side of the switch.
Closing:
Control Mode 2: AutoControl - LowInput: One switch
Opening
Hand opens as long as the OPEN-side of the switch
is operated.
Speed: Constant
Control Mode 3: VarioControl
Requires: 1 electrode or
1 linear transducer
With this control mode, the opening speed is determined by the strength and speed of the muscle contrac-
tion. The closing speed and grip force depend on the reduction of muscle tension.
Control with one electrode
Proportional. The opening speed is determined by the speed and strength of the muscle con-
Opening:
traction.
Proportional. The closing speed is determined by the speed and amount of the muscle relaxation.
Closing:
By very slow muscle relaxation to the electrode, the hand stops in an opened position.
Stopping:
Example 1: After opening the amputee slowly relaxes the muscle. Closing takes place proportional to the
decline of the electrode signal. The object is grasped with low force.
Example 2: After opening the amputee relaxes the muscle at maximum speed. The hand closes at maximum
speed and begins to grasp an object with maximum grip force (approx. 100 N).
36 | Ottobock
Closing
Signal from the switch
Gripping once with maximum force prevents the hand
from opening due to unintentional electrode signals.
Speed: Constant
Closing
Hand closes as long as the CLOSE-side of the
switch is operated.
Speed: Constant