Sacmi CCM001, User Manual

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002AZ001A
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7
ADJUSTMENTS
7.4 PNEUMATIC SYSTEM
The following can be adjusted in the pneumatic system:
- mains supply 0.5 MPa
- pellet insertion line (consult the “Data sheet”)
- product removal (consult the “Data sheet”)
7.5 HYDRAULIC SYSTEM
7.5.1 ADJUSTING THE OIL FLOW UNDER LOW PRESSURE
The stroke the actuator carries out to reach the punch is approximately 15 mm less than its total stroke and is carried
out with oil under low pressure. The time employed to carry out this stroke depends on the speed of the forming unit.
As a result, the flow rate of the low pressure circuit is strictly related to the rpm. The position of the flow control valve
of this circuit is indicated on the “Data sheet”.
Defective products may be produced if the oil flow rate is incorrectly set. The yellow warning light on the electric cabinet
comes on to signal a fault condition. A pair of inductive sensors (20), located near the point where the valve is opened
a second time (i.e., oil starts flowing under high pressure), detect the point at which the forming stroke starts. If both
sensors are activated by the measurement rod (21), or neither of them are energized, the machine will emergency shut
down as described in the ‘OPERATING INSTRUCTIONS” chapter.
The position in which forming starts can be adjusted by using the position indicator given on the “CCM DATA” page of
the control unit display. The actuators are in the correct position when the above mentioned indicator is in position =.
If the indication is >, the actuators are higher than the theoretical position and the low pressure oil flow has to be
decreased. On the other hand, if < is indicated, the actuators are lower than the theoretical position, therefore the low
pressure oil flow needs to be increased. To make the required corrections work on the flow control (24).
The pressure of the low pressure circuit has no real technological functions, as it is not used during product formation.
If this value varies, restore the correct value (see the “Data sheet”) by working on the adjustment valve (22) located in
the hydraulic power unit.
7.5.2 ADJUSTING THE FORMING STAGE (HIGH PRESSURE)
To obtain good quality products, a certain speed and force have to be used during the forming stage. These are based
on the flow and pressure of the high pressure oil circuit respectively. The pressure is regulated by working on the relative
valve (25) located in the hydraulic power unit while the oil flow rate is set by the relative flow control (23).
The values are given on the “Data sheet”.
7.5.3 ADJUSTING THE ACTUATOR DOWNSTROKE
An inductive sensor detects when the downstroke starts. If this sensor is not activated by the measurement rod (21),
the machine carries out an emergency cycle. (See chapter 6 - “OPERATING INSTRUCTIONS”).
If the machine shuts down because a safety device for the actuators return stroke has come into action, the return
pressure for the actuator (hydraulic spring) may need to be adjusted to restore the correct value. This value is also strictly
related to the characteristics of the product used. The value is given on the “Data sheet”. To adjust this value, work on
the related valve (26).
E0004P
WARNING!
Excessive pressure during the actuator’s return stroke may cause the cylinders to bang violently against their end
stops.