DROPSA VIP4Tools Coaxial Kullanım ve Bakım Kılavuzu - Sayfa 7

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7.3 LUBRICANT FLOW CUT-OUT
To completely stop the lubricant flow of a mini-pump, unscrew anticlockwise the red cap (see fig. ch. 4) until no
lubricant flows out.
MIN
1
III
2
3
The illustration below shows how to adjust the frequency of lubrication cycles when using models that
contain the Pneumatic Timer.
Above Cycle frequency is based on 6 bar (90 PSI) inlet pressure.
• If inlet pressure is 8 BAR (120 PSI) reduce the values by 8%
• If inlet pressure is 7 BAR (105 PSI) reduce the values by 4%
• If inlet pressure is 5 BAR (75 PSI) increase the values by 7%

8. TROUBLESHOOTING

The following diagnostic table indicates the main anomalies which may be encountered, the probable causes and
possible solutions. If you cannot solve the problem, do not attempt to disassemble parts of the machine but contact the
Engineering Department of DROPSA S.p.A.
ANOMALY
Anomaly in dosing
the air-oil mixture.
The air-oil mixture is
not delivered
OFF
MAX
0
60
II
5
4
POSSIBLE CAUSE
• Lubricant below the minimum
level
• Air in the system
• Faulty mini-pump
• Wrong mini-pump flowrate
regulation
• Wrong regulation of the mixing
air
• Lubrication nozzle obstructed
7.4 FLOW REGULATION
32
21
I
13
10
6
(pump cut-out)
CYCLES
7.5 ADJUSTING THE PNEUMATIC TIMER
PER MINUTE
(PN. 1524845)
→ Refill the reservoir
→ Discharge air from the system by acting on
mini-pumps discharge valves
→ Replace the mini-pump
→ Regulate the flowrate acting on mini-pumps
caps
→ Regulate air acting on the regulator
→ Wash and clean the nozzle
1. Completely screw the red cap
(flowrate = 0 mm³ ).
2. Screw 1½ turn (minimum flowrate 5
mm³), then each turn will correspond
to a flowrate increase of 5 mm³ up to
30 mm³:
Flowrate
mm³/stroke
30
25
20
15
10
5
0
cap totally unscrewed
Do not set a cycle frequency rate
of less than a second.
MAX CYCLE RATE OF MICROPUMP =
1 second
SOLUTION
Turns
6½
5½
4½
3½
2½
1½
7