Manual
operAtionAL oVerVieW
Below is a brief overview of what happens during the Etha
firing cycle. The location of parts discussed in the text
below can be found on pages 56-59.
Assuming the Etha is gassed up and turned on,
fiGure
5A
shows the marker in its idle position. The
bolt
is held
back under the tension from the
bolt spring
, with the
bolt
guide
filled with pressurised gas directly from the
inline
regulator
. The
firing poppet
is held in its forward position by
the
firing poppet spring
, keeping the
bolt guide
sealed.
When the
trigger
is pulled an electrical signal is sent to
the
solenoid
which directs a supply of air to the rear of
the
firing poppet
(See fiGure 5b)
. The force of this
gas is greater than the spring tension pushing the
firing
poppet
forward, and the
firing
poppet
is pushed back to its
rear position. In the
bolt
guide
this opens the exhaust port
to the
bolt
and seals off the supply port from the
inline
regulator
.
The gas pressure in the
bolt
guide
forces the
bolt
forward,
overcoming the spring tension from the
bolt
spring
, this
pushes a ball into the breach and closes off the
feed
tube
.
The internal
stem
of the
bolt
is pushed out of the
bolt
guide
, which then fully opens the exhaust port, allowing the
pressurized gas in the
bolt
guide
to exhaust through the
bolt
propelling a ball
(See fiGure 5c)
.
As the
bolt
guide
volume empties, the force pushing the
bolt
forwards decreases and the
bolt
spring
starts to push
the
bolt
back into the
bolt
guide
exhaust port. The spring
continues to push the
bolt
back up to its rest position
against the rear
bolt bumper
(See fiGure 5d)
.
The
solenoid
continues to hold the
firing
poppet
in its rear
position until the
Dwell time
expires. When this expires the
solenoid
exhausts the supply of air from the rear of the
firing
poppet
, removing the force holding the
firing
poppet
in this position. The
firing
poppet
spring
forces the
firing
poppet
forwards, closing the exhaust port and opening the
supply from the
inline regulator
(See fiGure 5e)
.
The
bolt
guide
begins to fill with pressurised gas. The Etha
has now completed a full cycle.
FIG 5A
FIG 5b
FIG 5C
FIG 5d
FIG 5E
ORIENTATION
INTRODUCTION
USING THE ETHA
USER INTERFACE
MAINTENANCE
FAULT FINDING
PARTS LIST
SERVICE CENTRES
INDEX
QUICK SET-UP
CONTENTS
19
ORIENTATION
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