OPERATIONS MANUAL – 5750440 – REVISION D
Increase
Pressure
Decrease
Pressure
Ink Regulator Maintenance Procedure
H5
Pressure swings (decreasing and increasing pressure from nominal setting) can be caused by
obstructions in the valve seat of the ink regulator. Obstructions in the valve seat area may also cause
the pressure to creep up over a period of time (for example, the pressure is set at 7 PSIG, and fifteen
minutes later it has increased to 9 PSIG).
The following maintenance procedure can remove obstructions from the valve seat area of the ink
regulator, restoring normal operation.
1
1
Ensure that the system is idle and not in print mode.
2
2
Install a NEW can of conditioner into the receiver (ink may be used, but conditioner is preferred).
3
3
Unplug the ink line from the printhead.
4
4
Plug the ink line into an effluent bottle (5750-503).
5
5
Remove the regulator adjustment locking screw, and pull the pressure adjustment knob into the
unlocked position.
6
6
Rotate the pressure adjustment knob clockwise until it stops, then counterclockwise until it stops.
Repeat six to twelve times.
7
7
Disconnect the ink line from the effluent bottle and re-connect it to the printhead.
8
8
Turn the ink regulator off (completely counter-clockwise).
9
9
Attach a pressure gauge to the ink outlet (male quick-disconnect). The gauge must be level with
the printhead for accurate measurements.
1
1
0
0
Increase the regulator to 7psi (nominal operating pressure).
NOTE:
The ink regulator pressure setting should always be adjusted by turning the pressure adjustment
knob clockwise (increasing pressure). Never set the regulator pressure by turning the knob
counterclockwise (decreasing pressure). If the regulator was adjusted above desired setting, turn the
regulator knob fully counterclockwise until it stops and purge the printhead to relieve internal pressure.
Then, slowly open the regulator by turning it clockwise until the desired pressure has been achieved.
Pressure Adjustment Knob
Adjustment Locking Screw
Lock Unlock
Содержание 5750-440
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