| Problem |
Cause |
Remedy |
Results |
| Dry-spray |
1. Inadequate
parts grounding |
1. Clean all
contact points - zero resistance is ideal. |
1. Reduces dry-spray |
| |
2. Improper KV |
2. Increase/decrease
the high voltage within the range of 30-100 KV. |
2. Reduces dry-spray |
| |
3. Excessive
powder velocity at the part |
3. Reduce Atomizing
/ Dosing / Dilution air pressure - a softer pattern is
better. |
3. Facilitates
better charging of powder and provides more uniform deposition |
| |
4. Excessive
powder delivery volume |
4. Reduce the
powder delivery air pressure - do not spray more powder
than can be charged. |
4. Facilitates
better charging of powder |
| Off-Color |
1. Improper KV |
1. INCREASE the
high voltage within the ranges of 30-100 KV. |
1. Will DARKEN
most metallics |
| |
2. Improper KV |
2. DECREASE the
high voltage within the ranges of 30-100 KV. |
2. Will LIGHTEN
most metallics |
| |
3. Excessive
powder delivery volume |
3. Reduce the
powder delivery air pressure - do not spray more powder
than can be charged. |
3. Color will
be more uniform and will usually become lighter |
| |
4. Distance between
gun and part |
4. INCREASE distance. |
4. Will LIGHTEN
most metallics |
| |
5. Distance between
gun and part |
5. DECREASE distance. |
5. Will DARKEN
most metallics |
| Splitting |
1. Particles
collecting on the electrode |
1. Utilize the
electrode "Rinsing-Air" or "Air-Wash" feature
if available. |
1. Eliminates
particle spitting |
| |
2. Particles
collecting on the deflector |
2. Periodically
clean the deflector surface with air. |
2. Eliminates
build-up and spitting |
| |
3. Surging powder
delivery |
3. Increase Atomizing
/ Dosing / Dilution air pressure. |
3. Better powder
deposition and more uniform color |
| |
4. Improper KV |
4. Adjust the
high voltage within the range of 30-10KV. |
4. More uniform
charging of powder |
