Adjusting The Needle Stroke - Krautzberger RA 5 Operating Instructions Manual

n Rotary stream – a rotary pulse produces a highly "swirled" spray jet; for difficult workpiece
geometries (angular sections etc.).
n Full-cone rotary stream – a rotary pulse produces a highly "swirled" spray jet; for difficult
workpiece geometries (back cuts, etc.).
Adjust the spray pattern with the following measures:
n Change the atomiser air pressure.
n Change the pressure of the spray fluid.
n Select another nozzle size.
n Adjust the needle stroke (optional) (
Too-high air pressure causes unnecessarily high air consumption and too-strong atomisation
of the spray fluid. It is recommended that you first adjust the spray pattern by varying the air
and spray fluid pressure. If you cannot achieve satisfactory results this way, you should
experiment with other nozzle sizes.
To reduce overspray and the concentration of harmful substances when coating, observe the fol-
lowing points:
n Guide the spray jet vertically to the surface
n Adjust the spray jet to suit the geometry of the workpiece
n The spray gun should be as close to the workpiece as possible
n Always spray in the extraction direction
7.5

Adjusting the needle stroke

Fig. 10: Adjusting the needle stroke
1. Pull out the needle stroke adjustment screw ( Fig. 10/1) until it loosens.
2. Adjust the needle stroke by turning the needle stroke adjustment screw ( Fig. 10/1).
3. Push in the needle stroke adjustment screw ( Fig. 10/1) until it tightens again.
GB–28
Operating instructions
Ä Chapter 7.5 'Adjusting the needle stroke' on page 28).
T-Dok-449-GB-Rev.7
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