Attendant Controls
The main ON/OFF switch to disable the SnapDragon in case of emergency is located on
the back surface of the main servo unit (the black box on the left hand side of the battery
compartment, see Fig:7). This switch is also the safety cut-out in case the safety circuits
detect any malfunction in the circuitry. Whenever this is turned off, you will hear a sad,
dying sound as the power is disconnected from the SnapDragon's computer. If it turns
itself off, and will not turn on again, contact Dragonmobility Ltd.
Below the ON/OFF switch is a knob which
enables an attendant to vary the performance
(power) of the SnapDragon according to
terrain or other environmental considerations.
By turning the knob clockwise acceleration to
the speed limit will be quicker for the same
movement of the joystick (increasing the
power available), turning it anti-clockwise
slows the acceleration down. A setting
between 9 o'clock and 12 o'clock is adequate
for most indoor use, depending on the skill of
the user, but to take on rougher terrain or to
drive up ramps the performance will need to
be increased. Higher settings on smooth flat
surfaces will give a sports performance, and care should be taken to restrict such use
unless the user is responsible and experienced enough to ensure his own safety and the
safety of others. The SnapDragon can be quite a powerful machine!
Also on the main servo unit are two push buttons which enable an attendant to drive the
powerbase backwards or forwards without the user controls (DCB) connected, for
instance, to load the SnapDragon up ramps into an estate car. These push buttons are only
operative when the Control Cable or DCB Cable is disconnected, connecting it for normal
use disables them so they can not function.
The button nearer the front drives the powerbase forwards, and the one nearer the back
drives backwards. Steering is achieved by guiding the back of the SnapDragon by hand.
Blipping the buttons in short bursts will make the SnapDragon move more slowly. The
setting of the performance knob will affect how powerfully the SnapDragon performs in
these circumstances, in the same way as it affects the joystick control.
Special attendant controls may be provided with a second DCB for attendant use which
takes over all the usual DCB functions from the user's DCB. Separate instructions will be
provided in this case.
Dragonmobility Ltd
SnapDragon
– Owner's Manua
l
Issue 1,8
© Dragonmobility Ltd, Sept 2016
Page 7
Fig:7
Main
ON:OFF
Switch
Forward
Attendant
Drive
Performance
Knob
Backward
Attendant
Drive
