M4serviceManual_e - 第40页
3 Mechanical Section 3-10 ③ Checking the head for clogging With no nozzles placed in the head, tu rn ON the suction to check the air pressure. Typical air pressure is approx. “0.004” MPa. An error will occur if the air p…
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
3 Mechanical Section
3-11
Nozzle
When obstacles such as solder paste is stuffed up in the nozzle, the suction becomes weak. And existence
of an obstacle at the nozzle tip prevents the vision processing from recognizing smaller components. Clean
nozzles to avoid these troubles.
■ Nozzle Cleaning with Air Blow
Clean nozzles with alcohol and then blow away dust with a blower (more than once a week). When
choking error occurs, also do the cleaning of the nozzle.
Be careful not to apply alcohol to identification marks. Quickly wipe off if
applied.
■ Nozzle Cleaning using Wire (1)
If the stain on the nozzle is stubborn, clean the nozzle using a wire.
Take care not to get injured with the fine wire when cleaning the nozzle.
ACTION:
① Have a wire ready.
(300mm length, 0.1mm diam. Part No. KV8-M8887-00X
② Pass the wire through the nozzle hole.
Wire
Nozzle
③ Wind to fasten the wire between both sides of the nozzle cleaner assy.
(Part No. KV8-M8881-A0X)