Alamo MACHETE Product Service Manual page 19

CONTROL VALVE - JOYSTICK
JOYSTICK FUNCTIONS: (Figure 4)
To operate a function the following series of events must work.
1. The Joystick Controller is moved in the correct direction the required distance, During its
movement an electrical signal is sent to the electric Controller in the proper Valve Section
of the Control Valve.
2. The Electric Controller sends an electrical signal, which causes the Proportional Control
Valves to actuate the proper amount based on the signal from the Controller. EXAMPLE:
Valves 1 & 3 allow Pilot Pressure Oil to flow to the corresponding end of the Spool, Thus
causing it to move. Valves 2 & 4 allow the Oil from the opposite end of the Spool to return
to the Tank. (NOTE: Lift, Swing and Dipper functions are Proportional, Door and Tilt
functions are "ON" or "Off" Only, See later section for explanation of Proportional).
3. The Spool position Transducer sends an electrical signal to the Electronic Controller which
indicates the position of the Spool.
4. The Electronic Controller will continue to adjust the Valves (1 - 4) in order to maintain an
equilibrium between the Joystick signal and the feedback signal.
5. Reaction time from the time the Joystick is moved until the Spool moves is approximately
300 milliseconds.
6. The Rocker Type Switch on top of the Joystick is spring centered 3-function switch (Figure
4). When used alone the Rocker Switch controls the Head Tilt function, When used in
conjunction with the Trigger Switch the Rocker Switch opens and closes the Door, Both
of these functions are NOT controlled Proportionally. When the Toggle Switch is activated,
The electrical signal fully opens either Valve 1 or 3 and fully closes either valve 2 or 4 in the
correct Valve Section depending on which way the Spool needs to travel. The Electronic
Controller and the Spool position Transducer are not included in these functions.
7. Earlier Model Joysticks Master Switch was a 2 Push/Pull Switch type. Later Models have
one Push/Pull Switch with a Momentary Pull Start Switch built in to it and a Lighted Rocker
Master Switch.
Trigger
Switch
Pistol Grip
Handle Switch
Fuse
Master
Switch
FIGURE 4
MACHETE (Service Manual) 04/04
© 2004 Alamo Group Inc.
Rocker
Switch
Push Right
Push Left
Motor Start
Stop Switch
Push Right
Push Left
Pistol Grip Handle Switch
Push Front
Pull Back
Push Right
Push Left
Rotate Right =
Rotate Left
19
Joystick Functions
Rocker Switch Only
= Tilt Down
= Tilt Up
Rocker & Trigger Switch
= Door Close
= Door Open
= Lift Down
= Lift Up
= Dipper Up
= Dipper Down
Swing Out
= Swing In