DROPSA VIP4Tools Coaxial, User And Maintenance Manual, Page: 7 / 11

7
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.
7.4 FLOW REGULATION
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
Turns
30 6½
25 5½
20 4½
15 3½
10 2½
5 1½
0
(pump cut-out)
cap totally unscrewed
7.5 ADJUSTING THE PNEUMATIC TIMER
(PN. 1524845)
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 POSSIBLE CAUSE SOLUTION
Anomaly in dosing
the air-oil mixture.
The air-oil mixture is
not delivered
•
Lubricant below the minimum
level
→ Refill the reservoir
•
Air in the system
→ Discharge air from the system by acting on
mini-pumps discharge valves
• Faulty mini-pump → Replace the mini-pump
• Wrong mini-pump flowrate
regulation
→ Regulate the flowrate acting on mini-pumps
caps
•
Wrong regulation of the mixing
air
→
Regulate air acting on the regulator
•
Lubrication nozzle obstructed
→
Wash and clean the nozzle
0
I
II
III
32
21
13
10
6
5
4
3
2
1
OFF
MAX
MIN
60
CYCLES
PER MINUTE
Do not set a cycle frequency rate
of less than a second.
MAX CYCLE RATE OF MICROPUMP =
1 second