Otto Bock MyoHand VariPlus Speed 8E38-9, Manual, Page: 28 / 184

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FlexiGrip becomes active when a 130 N force is applied when moving an object within the hand.
Once the object has been repositioned, the SensorHand Speed reverts to the previous grip force.
Control Mode 1: DMC plus Auto-Grasp: Two electrodes
Opening Closing
Myo-signal to the electrode
Opening speed
Proportional 15 mm/s - 300 mm/s
Myo-signal to the electrode
Closing speed
Proportional 15 mm/s - 300 mm/s
Initial grip force Auto-Grasp grip force increase FlexiGrip function
Proportional:
0 N - 100 N
Proportional:
up to 50% higher than initial grip force
e.g.
initial grip force 10 N
grip force increases as necessary, up
to 15 N
Occurs when repositioning force is
higher than the present grip force
Effective from 20 - 130 N
The patient can always overcome the Auto-Grasp feature with a stronger EMG muscle signal and increase
the grip force up to the maximum of 100 N.
Control Mode 2: AutoControl - LowInput
Requires: 2 electrodes,
1 electrode and 1 switch or
1 switch
The hand closes at maximum speed and grasps an object with the minimal amount of grip force (10 N).
If the sensor recognises that the object is slipping, it automatically increases the grip force up to the
maximum (100 N), as necessary.
FlexiGrip becomes active when the maximum grip force is applied when moving an object within the hand. Once
the object has been repositioned, the SensorHand Speed reverts to the previous grip force.
Control with two electrodes
Opening:
Proportionally controlled by the OPENING electrode.
Closing:
At highest speed by short muscle signal of any level above the ON-threshold to the CLOSING
electrode.
Control Mode 2: AutoControl - LowInput: Two electrodes
Opening Closing
Myo-signal to the electrode
Opening speed
Proportional 15 mm/s - 300 mm/s
Myo-signal to the electrode digitally (short signal
at any level)
Closing speed
Constant 300 mm/s
Initial grip force Auto-Grasp grip force increase FlexiGrip function
10 N Up to 130 N Effective at maximum grip force