HS50_advance_level 2 - 第114页
07/2002 Editio n Student G uide HS -50 Advanc ed II 4 Pneum atic 12 9 D FXXP&KHFN6HJPHQW6HDOHGEHI RUH3LFN8S 1. The qual ity of the segme nt sea l is che cked prior to each pick up . 2. This te sts the…
Student Guide HS-50 Advanced II 07/2002 Edition
4 Pneumatic
11
9DFXXP&KHFNEHIRUH3ODFHPHQW
1. Another vacuum check is made before placement, this ensures the component is still at the
nozzle.
2. The same threshold values apply as during pick up. Any failed components will be rejected dur-
ing the next pick up cycle.
3. If a Component Sensor installed and for the specific component activated, the check for
present the component on the nozzle occurred with the component sensor.
9DFXXPFKHFNVIRUFKHFNWKHYDOYHSOXQJHU
In order to check the C&P head function constantly 2 further vacuum checks are carried out in the
placement cycle.
1. A further vacuum check is carried out before pick up a BE´s.
2. A further vacuum check is carried out after placement a BE´s.
3. The vacuum value "before pick up" may vary compared to the value "after placement" by a
maximum of 50 mbar. Otherwise, they receive the error message "Difference in vacuum too
great between placement and pick up" announced.
This inspection is not dependent on the nozzle types.
-700
-720
-740
-760
-780
-800
-820
-840
-860
-880
-900
0
t
PD[LPXPYDFXXP
9DFXXPQR]]OHFORVHG
9DFXXPQR]]OHRSHQ
9DFXXPGLIIHUHQFHDW
WKHODVWUHIHUHQFHUXQ
(QYLURQPHQWSUHVVXUH
&RPSRQHQWLVUHMHFWHGDWUHMHFWER[DWWKHQH[WSLFNXSF\FOH
&RPSRQHQWLVDFFHSWHG
DWYDFXXPFKHFN
3UHVVXUHGLIIHUHQFHQR]]OHLQVLGH!HQYLURQPHQW
07/2002 Edition Student Guide HS-50 Advanced II
4 Pneumatic
12
9DFXXP&KHFN6HJPHQW6HDOHGEHIRUH3LFN8S
1. The quality of the segment seal is checked prior to each pick up.
2. This tests the quality of the seal given by the vacuum plunger.
3. Normally the result should be within ± 20 mbar of the closed result determined during refer-
ence.
4. If a result is outside the tolerance, then the machine logs an error. If the error occurs 3 times
within 350 placements at the same segment, an error is reported "Leaky segment".
5. If this error occurs check the condition of the valve plunger.
6. The values for 20 mbar, 3 errors and 350 placements are in the vacuum.MA file.
-700
-720
-740
-760
-780
-800
-820
-840
-860
-880
-900
0
t
-920
7KUHVKROGPEDU
7KUHVKROGPEDU
9DFXXPGLIIHUHQFH
DWUHIHUHQFHUXQ
3UHVVXUHGLIIHUHQFHQR]]OHLQVLGH!HQYLURQPHQW
(UURURQWKLV
VHJPHQWLVORJJHG
(UURUORJJHG (UURURQWKLV
VHJPHQWLVGLVSOD\HG
Student Guide HS-50 Advanced II 07/2002 Edition
4 Pneumatic
13
$LU.LVVDW3ODFHPHQWRUDW5HMHFW3RVLWLRQ
1. Air kiss is applied at placement and reject positions to remove the component from the nozzle.
2. The placement pressure should be set to:
0.15 bar 71x/91x nozzles
0.20 bar 70x/90x nozzles
3. The reject pressure should be set to 0.25 bar.
200
160
120
80
40
0
t
240
$LUNLVVDWSODFHPHQWSRVLWLRQWR
UHPRYHWKHYDFXXPLQWKHQR]]OH
DQGWRSODFHWKHFRPSRQHQW
$LUNLVVDWUHMHFWSRVLWLRQWRUHPRYHWKHYDFXXP
LQWKHQR]]OHDQGWRUHMHFWWKHFRPSRQHQW
3UHVVXUHGLIIHUHQFHQR]]OHLQVLGH!HQYLURQPHQW