Campbell Hausfeld AL2710 Electrical System, Spray Technique, Electrical Board Calibration

Operating Instructions and Parts Manual AL2710

Airless Paint Systems

Operation (Cont.)

SPRAY TECHNIQUE

Good Spray Gun Technique is at the core of any spray paint operation. Operator skill and efficiency is as important as good equipment and good paint. Good spray technique is a skill that can be developed by following these simple instructions.

If you are not familiar with spraying techniques, study this section of your manual and practice the proper technique on pieces of cardboard or a suitable surface.

Hold the spray gun 12 - 15 inches away from the work surface and keep it perpendicular (straight) to the surface. Move the spray gun parallel to the work and at a right angle to the surface. (See Figure 8).

Move the gun at a steady rate in order to apply a good coverage. The wet coat should be just under the thickness at which a run or sag will occur. Slow gun movement or gun held too close will result in an overly wet or thick wet or thick coat coverage that is likely to run or sag.

Do not wave the spray gun. This waving is called arching. Instead, hold the spray gun at a 12 to 15 inch

distance perpendicular from the work. (See Figure 9.)

The closer the spray gun is held to the work, the thicker the paint is deposited and the faster the gun must be moved to prevent sags and runs. Holding the gun too far from the work will cause excessive fog, overspray, and a thin and grainy coat.

It is important to "trigger" the gun after gun movement (arm movement) has started and release trigger (shut gun off) before gun movement ends. Gun movement is always longer than actual paint (spray) stroke. In that manner, even blending and uniform paint coat thickness is achieved over the entire surface. When the gun is in motion as the trigger is pulled, it deposits an even amount of paint.

Overlap the previous pass by half the width of the spray pattern. Aim at the bottom of the previous pass.

Adjust Pressure Control Knob so that paint is completely atomized from the spray gun. Insufficient pressure will result in “tailing.” Too much pressure will result in excess fog and overspray, excessive tip wear, and increased sprayer wear and tear.

Always use the lowest pressure possible to obtain desirable results. Test the

	INCORRECT
Start Pull	ReleaseEnd
Trigger	Trigger
	CORRECT
Figure 9 - Proper Spray Technique

spray pattern on a piece of cardboard or other surface.

To cover “inside” and “outside” corners (on walls or other objects), aim the spray gun toward the center of the corner. The spray pattern is divided in half, and the edges of the spray pattern on both walls are the same.

Electrical System

ELECTRICAL BOARD CALIBRATION

12-15”

Gun is held perpendicular	Gun is held at an angle,
to work piece, fluid	fluid disperses unevenly
disperses evenly

RIGHT	WRONG
Figure 8 - How to hold spray gun when spraying

NOTE: Anytime a sensor, pressure control assembly (board) or both are replaced, the following calibrations must be performed.

ZERO CALIBRATION

1.Place prime/pressure relief valve in the prime (open) position.

2.Set the pressure control knob to the minimum setting (CCW).

3.Remove the screws and lower the pressure control assembly.

4.Ensure the jumper is on the "P-ZR" terminal. Note: This jumper comes with a new pressure control

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