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
QUICK GUIDE










