The direction of the spraying motion should be based on the spray pattern chosen: when spraying a horizontal pattern, the direction should be up and down; when spraying a vertical pattern, the direction should be left to right or right to left; when spraying a round pattern, the direction can be either.
CAUTION: Once you have filled the spray gun, it is important to keep the gun upright. You may tilt the gun as necessary to spray a ceiling or table top for example , but note that the Pressure Feed Tube that pressurizes the paint cup is internal. Do not turn the gun on it side or upside down when there is paint in the cup as the paint may block the air holes and prevent the pressurization of the paint cup.
3.8TESTING PRIOR TO SPRAYING
??For optimum results, always test coating viscosity, spraying distance, pattern size, film thickness, Needle/Fluid Tip/ Air Cap combination and finish, on a sample of the surface to be coated.
??To test the proper application speed (speed of your hand), spray one pass on a sample of the surface to be coated at a consistent speed. Examine the sprayed coating: if there appears to be space between the droplets of paint, slow down your application speed; if individual droplets are not visible and the film seems even, note the application speed and maintain it throughout use.
??To test the Needle/Fluid Tip/Air Cap combination and to ensure even film thickness (coat of material being applied), use the Horizontal Spray Pattern Test:
Horizontal Spay Pattern Test
1.Turn the Air Cap to the vertical position – this will spray a horizontal pattern.
2.Maintaining the distance of
3.Release the trigger and point the gun away from the surface.
4.Repeat steps
Watch the material sag and see if it runs (drips) evenly across the spray pattern. If so, your Needle, Fluid Tip and Air Cap combination are correct. If not, identify a common problem with all the test patterns sprayed and refer to the following troubleshooting chart:
| Problem |
| Solution |
|
|
|
|
?? | Coating is running/dripping from the center of | ?? | Air Cap may be too large: try smaller size Air |
| the pattern |
| Cap |
?? Coating is running/dripping from the | ?? | Air Cap may be too small: try larger size Air | |
| extremities of the pattern |
| Cap |
?? | Pattern is in the form of a figure 8 | ?? | Air Cap may be too small: try larger size Air |
|
|
| Cap |
|
| ?? Air Cap may be too close to the Fluid Tip: turn | |
|
|
| the Sleeve Nut slightly to move Air Cap further |
|
|
| from Fluid Tip |
HERO Operator’s Manual – Page 11 of 23