M4serviceManual_e.pdf - 第39页
3 Mechanical Section 3-9 ■ Checking by Vacuum Me ter Instead of using the machine’s air pressure measurem en t function, a digi tal vacuum m eter can be used to check the head’s maxim um air pressure as well as that of t…
3 Mechanical Section
3-8
Inspection for Head/Nozzle Clogging and Solenoid Valve
Breakdown
The following inspection must be carried out approximately once a week.
■ Inspection of Solenoid Valve
The switching valve of the solenoid valve may catch foreign matter causing air leakage. Air leakage will
turn the suction ON even if it is turned OFF.
As a result, the suction cannot be turned OFF after a component is mounted, and components may be
returned instead of being mounted on the PCB.
● Inspecting by selecting [Manual] – [Meas. Air pressure]
①Checking the maximum air pressure
Turn ON the suction and press the head tip with fingers to check the air pressure. The air pressure is
satisfactory if it is “600” or higher.
②Checking the head for clogging
With no nozzles placed in the head, turn ON the suction to check the air pressure. Typical air pressure is
approx. “30”. An error will occur if the air pressure is “120” or higher during vacuum check performed
after nozzle replacement.
③Checking the nozzle for clogging
With nozzles placed in the head, turn ON the suction to check the air pressure. “Nozzle clog criteria” has
been set for each nozzle. The air pressure must be below the criteria. If it is not, the nozzle will be
considered to be clogged and an error will occur.
④Checking the solenoid valve for switching failure
Turn OFF the suction and check for change in the air pressure.
- Press the head/nozzle tip with fingers and check for change in the air pressure.
- Turn ON and OFF the suction a few times and check for change in the air pressure.
If the air pressure changes even though the suction is OFF, air is probably leaking from the suction solenoid
valve.
NOTE: Do not disassemble the solenoid valve. Manufacturer’s guarantee will be ineffective if the solenoid valve is
disassembled.
Part Name
Part No. Remark
SOL.VALVE LC1-M71A1-00X solenoid valve
NOTE: For official inspection, use of a digital vacuum meter is necessary to check accuracy of the displayed air
pressure value.
Part Name
Part No. Remark
MANOMETER ASSY. LC1-M89A5-00X Vacuum Gauge Set
3 Mechanical Section
3-9
■ Checking by Vacuum Meter
Instead of using the machine’s air pressure measurement function, a digital vacuum meter can be used to
check the head’s maximum air pressure as well as that of the head and nozzle for clogging.
ACTION:
①Connecting a vacuum meter
Remove the air hose from the joint at the vacuum generator side, attach a branch joint and connect the
vacuum meter as shown below.
Head Manifold Section (Front View)
Joint (at the vacuum generator side)
Branch joint
Side View
Vacuum meter
*The Front View Illustration is for M4a, but the different with M4e/M4s is total head number only.
The Side View Illustration is same for both types of machine.
②Checking the maximum air pressure
Turn ON the suction and press the head tip with fingers to check the air pressure. The air pressure is
satisfactory if it is “0.08” MPa or higher.
3 Mechanical Section
3-10
③Checking the head for clogging
With no nozzles placed in the head, turn ON the suction to check the air pressure. Typical air pressure is
approx. “0.004” MPa. An error will occur if the air pressure is “0.016” MPa or higher during vacuum check
performed after nozzle replacement.
④Checking the nozzle for clogging
With nozzles placed in the head, turn ON the suction to check the air pressure. “Nozzle clog criteria” has
been set for each nozzle. The air pressure must be below the criteria. If it is not, the nozzle will be
considered to be clogged and an error will occur. (The “standard open value” given in the table below is
obtained from measurement of the open value of each nozzle (brand new nozzle) and must be used as a
reference.)
Standard open value (reference) Nozzle clog criteria
Nozzle type
(mmHg) (MPa) (mmHg) (MPa)
M001
M031
590～630 0.077～0.084
640 0.085
M002
M032
435～515 0.063～0.068
540 0.071
M003
285～345 0.043～0.048
420 0.056
M004
70～90 0.009～0.012
350 0.047
M005 40 or less 0.0053 or less 300 0.040
M006 40 or less 0.0053 or less 300 0.040
M012
240～265 0.032～0.035
270 0.036
M013
65～85 0.009～0.011
270 0.036
M017
380～410 0.051～0.055
470 0.063
M018
70～90 0.009～0.012
300 0.040
M019
70～90 0.009～0.012
300 0.040
M020 40 or less 0.0053 or less 300 0.040
NOTE: 1mmHg=133.322Pa=0.00013332MPa