Otto Bock SensorHand Speed 8E38-8 Manual page 32

Example 1: After opening the hand, the patient slowly relaxes his muscle. The hand closes slowly, analo-
gous to the duration of the muscle relaxation. The hand will grasp gently at 10 N and there is
no other Auto-Grasp function.
Example 2: After opening the hand, the patient relaxes the muscle at maximum speed. The hand closes at
maximum speed and begins to grasp an object with 10 N grip force. If the sensor recognises
that the object is slipping, it automatically increases the grip force up to the maximum (130 N),
as necessary.
Control Mode 4: VarioControl: One electrode
Opening
By speed and strength of the muscle tension to
the electrode
Opening speed
Proportional
15 mm/s - 300 mm/s
Initial grip force
10 N
10 N
Control with one linear transducer
Proportional. The speed and strength of the pull on the linear transducer determine the opening
Opening:
speed of the hand.
Proportional. The speed of the release of the linear transducer determines the closing speed.
Closing:
This also affects the level of the maximal grip force.
By very slow release of the linear transducer, the hand stops in an opened position.
Stopping:
Example 1: After opening the hand, the patient slowly releases the linear transducer.
The hand closes slowly, analogous to the duration of the muscle relaxation. The hand will grasp
gently at 10 N and there is no other Auto-Grasp function.
Example 2: After opening the hand, the patient releases the linear transducer at maximum speed.
The hand closes at maximum speed and begins to grasp an object with 10 N grip force. If the
sensor recognises that the object is slipping, it automatically increases the grip force up to the
maximum (130 N), as necessary.
32 | Ottobock
Closing
By speed and amount of the muscle relaxation to
the electrode
Closing speed
Proportional
15 mm/s - 300 mm/s
Auto-Grasp grip force increase
At low to moderate closing
speed
None
At moderate to high closing
speed
Up to 130 N
FlexiGrip function
Effective at 20 N
Effective at maximum grip force