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Old 10-01-2007, 04:13 PM #1
xluben
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Thumbs up How a FASOR works.

The Fusion is a FASOR (forward air, spring operated return).

Here's is an animation of the Odyssey O2 (which is also a FASOR):

http://tog.motorwave.net/pics/o2.html
(animation courtesy of TESballer)

The original Fusion operates exactly like this (including LPR) except there are
internal airways milled into the Fusion body (instead of exposed hoses like on
the Odyssey).

The new F8 Fusion does not have an LPR. The same pressure air is routed to
the poppet valve and to the solenoid.

Here is a very good explanation of the FASOR design written by Bill Mills of WARPIG.

*Note: The following article describes the Infinity Legend, but operation is
exactly the same as that of the F8 Fusion (no LPR). The original Fusion has a
LPR which further lowers the air pressure before it is sent to the solenoid and
then to the ram.

Quote:
Originally Posted by WARPIG


The Legend is relatively simple in operation, which allows it to be built with
fairly few parts. Moreover the implementation of its design uses a minimal
number of moving seals, ultimately reducing risk of component failure. The
heart of the marker is a basic poppet valve, similar in structure to those found
in pump markers tracing their way back to the PGP, or blowbacks semis like
the Illustrator and Spyder. The Legend is a true electropneumatic marker. It
uses uses air pressure to drive a ram against the poppet valve, while
simultaneously closing the breech with a linked bolt.



Rather than using blowback gas, or a two-directional ram system to return
the ram and bolt to their resting positions at the rear of the marker, the
Legend has a mainspring between the ram and valve. It is compressed during
firing, and expands back out at rest.

The Legend's firing cycle begins with the marker at rest, the bolt in an open
position. In this state, compressed gas is being fed into the front block of the
Legend from its regulator and from there to the front of the lower of the
receiver's two tubes.



The gas stops at the valve. Here, the valve spring holds the cup-seal against
the valve.

A small brass hose barb and hose also directs gas from the front block to the
Legend's solenoid valve which is mounted vertically inside the grip frame. It is
notable that the front-block design would make use of an LPR a fairly simple
matter of building a custom front-block – though it may not provide
operational benefits.

A shorter hose runs from the solenoid valve to a quick exhaust valve on the
rear bottom of the receiver. From here, there is an open path to the ram
housing.



When the Legend fires, the solenoid valve delivers compressed gas to its
output hose, which travels up to the ram housing. The gas pushes the ram
shaft forward out of the ram housing. As the hammer moves forward it
simultaneously closes the bolt, as the two parts are connected by the link
pin. Sitting between the hammer and valve is the Legend's mainspring. As the
hammer moves forward this spring is compressed.

When the hammer reaches the front of its stroke the bolt has closed, sealing
against an o-ring in the breech. At this point the hammer presses forward on
the valve pin, which pushes the cup seal back away from the body of the
valve. This opens the valve.



With the valve open, compressed gas now has a direct route to escape from
the legend. It flows up from the valve chamber, around the cup seal and
through the valve body, then up through a connecting passage in to the
bolt's gas port. It passes through an angled passage in the bolt, and then out
the bolt face where only one thing blocks its path to the atmosphere and
pressure equalization – the paintball. The gas expands, pushing the paintball
ahead of it and out the barrel.

When the Legend's circuit board stops sending power to its solenoid valve,
the valve resets, and stops sending gas pressure to the ram assembly.
Without force behind it to counteract the mainspring, the hammer and bolt
quickly return to their rear position, forcing air out of the ram, and allowing
the valve to close.
I hope this is helpful to anyone wondering how the Fusion operates!
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Last edited by xluben : 10-02-2007 at 12:54 AM.
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Old 10-01-2007, 04:44 PM #2
josh_did_what
I like sushi.
 
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nice but i think its in the stickys anyway
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Old 10-01-2007, 04:51 PM #3
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Quote:
Originally Posted by josh_did_what View Post
nice but i think its in the stickys anyway
i don't think it is. i made it in hopes that it could be added to the sticky thread.
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Old 10-01-2007, 06:13 PM #4
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looks good to me....
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Old 10-01-2007, 06:33 PM #5
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awesome! thanks luben!
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Old 10-01-2007, 06:57 PM #6
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Well done.

If it's not already in the stickies, then sticky it!
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Old 10-01-2007, 08:35 PM #7
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joo is giveing me a run for my money in sticky powers speaking

jk great job!
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Old 10-01-2007, 08:57 PM #8
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Quote:
Originally Posted by xluben View Post
i don't think it is. i made it in hopes that it could be added to the sticky thread.
this is a better description then what i remembered anyway.
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Old 10-01-2007, 08:59 PM #9
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friday someone remind me to update it I keep forgetting
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