HS50_advance_level 2.pdf - 第355页
S tudent Guide HS-50 Adva nced II Editio n 07/200 2 12 S pecial handlin g for th e Z-axis 11 3LFNXS ZLW KWKH (DUO\YDFXXP RSWLRQ DFWLY DWHG 6LJ QDOVIURP WRSWR ERWWRP Positio nal de viation: 200 …
Student Guide HS-50 Advanced II
12 Special handling for the Z-axis Edition 07/2002
10
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Positional deviation: 1V 10 ms
Force signal: 5 V 10 ms
Iactual: 5 V 10 ms
Vtarget: 5 V 10 ms
The acceleration for the Z-axis is reduced here to 98.2%. The result is that the “special mode 44
digits slow” is not switched on.
Reduction of force after braking has begun in order to pick up the component from the feeder
securely and without damaging it.
From 6 to 8 digits are printed on the component so that the nozzle lands properly on the
component.
End signal for " Downwards"
Student Guide HS-50 Advanced II
Edition 07/2002 12 Special handling for the Z-axis
11
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Positional deviation: 200 mV 10 ms
Iactual: 5 V 10 ms
Vtarget: 5 V 10 ms
End signal: 5 V 10 ms
The "Early vacuum" option was activated here during the pick-up operation (see the package form
description),
recognizable by the short "stop time" on the component.
"Early vacuum" switched on here
The "Early vacuum" option is activated for package forms that are picked up using small nozzles.
The result is that while the nozzle moves downwards, a vacuum is created in the air system of the
placement head. This means that the component remains securely fixed to the nozzle when it is
moved upwards. The pick-up procedure is shortened.
Disadvantage: The placement head gets dirty more quickly when large nozzles are used because
air is sucked in when the nozzle is open and the effect of the vacuum through the large nozzle
opening is questionable.
Student Guide HS-50 Advanced II
12 Special handling for the Z-axis Edition 07/2002
12
3LFNXSLQPRGH6ORZVWDUW
6LJQDOVIURPWRSWRERWWRP
Positional deviation: 200 mV 10 ms
Force signal: 5 V 10 ms
Vtarget: 5 V 10 ms
End signal: 5 V 10 ms
"Standard" mode 1 was used for pick-up here (see the package form description).
Mode 3 "Slow start" was selected for the initial motion upwards in order to securely hold the
component on the nozzle,
recognizable by the long "start time" when the nozzle moves upwards.
Reduction of force after braking has begun in order to pick up the component from the feeder
without damaging it.
This mode is used for exotic and heavy package forms so that they can be picked up securely
from the feeder (also suitable for use with narrow tape pockets). This mode can be selected
regardless of the nozzle size. In all software versions up to 502 this mode corresponded to a
special mode for the Z-axis with an acceleration value of 98.2 %. An initial path (e.g. 44 digits) is
traveled at the start speed.
Disadvantage: The pick-up operation takes about 20 ms longer.