Otto Bock 8E70 Instructions For Use Manual page 51

7.5 Switching between default and alternative grips
Switching between the default and alternative grip can be carried out as follows, depending on
the selected mode:
• Mode 0: program switch
• Modes 1 through 4: with another open signal after fully opening the hand
• Mode 5: co-contraction signal after fully opening the hand
The following switching mode is set on delivery of the terminal device (factory setting):
7.5.1 OPEN-OPEN/co-contraction
OPEN-OPEN
OPEN-OPEN switches between the default and alternative grips via the open electrode (pull
switch, button or similar) (mode 4). OPEN-OPEN is produced by fully opening the hand (OPEN)
followed by a brief open impulse (OPEN).
INFORMATION
When using the electric rotator with MyoRotronic 4-channel control, the musculature may only
relax until it briefly falls below the on-threshold of the bebionic hand in order to then generate
the open impulse. Fully relaxing the musculature or the elimination of the muscle signal leads to
rotation control when generating an impulse.
Co-contraction
Co-contraction is used to switch between the default and alternative grips via two electrodes
(mode 5). The co-contraction is the simultaneous and brief tensing of both muscle groups. This
reliable control of the switching mode is only possible with two good myo-signals. However, the
co-contraction cannot be used as the switching mode between the hand and hand rotation. The
settings can be configured using the "Co-contraction" button in the adjustment software.
7.6 Donning mode
Activating donning mode
1) Move the thumb to the opposed position.
2) With the terminal device switched off, press and hold the program switch on the back of the
hand until the thumb automatically moves to donning mode.
→ The thumb moves in towards the palm.
or
1) Switch the prosthesis on with the button in the charging receptacle or the switch on the elbow
joint.
2) During the initialisation phase of the terminal device, press and hold the program switch on
the back of the hand until the thumb automatically moves to donning mode.
→ The thumb moves in towards the palm.
INFORMATION
Sending the product to an authorised Ottobock Service Centre
Set the thumb to the lateral position and then activate "donning mode" on the terminal device.
Deactivating donning mode
► With the thumb pointing inward, press and hold the program switch on the back of the hand
until the thumb opens.
→ Donning mode is deactivated and the terminal device is switched on.
8 Cleaning and care
1) Switch off the product before cleaning.
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