g) Adjustments (Used new controller)
1. Before Starting Engine
The GAIN and STABILITY adjustments are set to mid position.
STARTING FUEL : FULL CW (Maximum Fuel)
SPEED RAMPING : FULL CCW (Fastest)
IDLE : FULL CW (Idle speed increase position)
Place the engine in idle by connecting Terminals M & G.
2. After Starting Engine
When starting engine at first, actuator activates forward “maximum fuel” position. After starting
engine, adjust to maintain idle speed. The speed control unit governed speed setting is factory
set at approximately engine idle speed. (1000 Hz, speed sensor signal)
Adjust STARTING FUEL and SPEED RAMPING depending on engine running status.
If the engine is unstable after starting, turn the GAIN and STABILITY adjustments
counterclockwise until the engine is stable.
After disconnecting Terminals M & G, turn SPEED to adjust maximum engine speed.
After connecting Terminals turn IDLE to set idle speed at 750 rpm. Then disconnect Terminal
M & G, to recheck and readjust maximum engine speed.
3. Governor Speeding Setting
The governed speed set point is increased by clockwise rotation of the SPEED adjustment
control. Remote speed adjustment can be obtained with an optional 5K Speed Trim Control
4. Governor Performance
Once the engine is at operating speed and at no load, the following governor performance
adjustment can be made.
Rotate the GAIN adjustment clockwise until instability develops.
Gradually move the adjustment counterclockwise until stability returns.
Move the adjustment one division further counterclockwise to insure
stable performance.
Rotate the STABILITY adjustment clockwise until instability develops.
Gradually move the adjustment counterclockwise until stability returns.
Move the adjustment one division further to insure stable performance.
Gain and stability adjustments may require minor changes after engine load is applied.
Normally, adjustments made at no load achieve satisfactory performance. A strip chart
recorder can be used to further optimize the adjustments.
Note :
If instability cannot be corrected or further performance improvements are required, refer to
the section on SYSTEM TROUBLESHOOTING.
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