SECTION 5, Page 7
SJIII Series - The Conventional
s 129919
Flow Control
Single coil or solenoid for single direction. The coil has two connections; one is wired to the P.C. Board (A)
terminal and the other is wired to (-), or the negative side of the supply voltage. Switches to control directional
valves may be provided on the controller.
Adjustment Procedures
Adjustments are made by turning a trimpot adjustment screw. The trimpots are multi-turn, end to end-devices. It
may be necessary to turn the adjustment screw several turns to observe a change in output.
Clockwise (CW) adjustment of the trimpot increases the output.
Counter-clockwise (CCW) adjustment of the trimpot decreases the output.
Adjustments affect output current, voltage or percentage of duty cycle to the coil. The minimum and maximum
output is preset at the factory. However, for optimum performance, they must be adjusted while the equipment is
operating.
Although the following adjustments affect the current/voltage or percentage of duty cycle, the best way to adjust
the function is to observe the response or speed of the function. The following adjustments affect function
response, or speed. There may be some interaction between adjustments, making it necessary to repeat the
adjustment in order to achieve the desired response.
“Threshold” Adjustments
Adjusts the initial current flow or duty cycle, affecting the function response or speed when the handle is first
moved from the off position. Deflect the handle slowly to the position where the controller first turns on. Adjust
the threshold trimpot screw to the point where the controlled function just starts to move, then turn the trimpot
screw one, full turn in the counterclockwise direction.
This adjustment should be done first.
“Maxout” Adjustments
Adjusts the full stroke current or duty cycle affecting the maximum function response, or speed when the handle
is deflected to its full travel. Fully deflect the handle, and adjust the maxout trimpot for maximum desired func-
tion response or speed. To obtain proportional resolution, it is important that the function starts to slow down as
soon as the handle is moved back from the fully deflected position.
The ideal adjustment occurs when the function just begins to move when the handle is deflected, and the output
increases until it reaches its maximum desired response or speed at the end of handle travel.
OEM Joystick Electronics Information
Summary of Contents for SJIII Compact 3215
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