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User Manual SIPLAC E CF 7 Station extensions Software Version SR.408.xx 03/2006 US Edition 7.3 Coplanarity laser module 185 The cop lanarit y laser mo dule is combined with op tical co mponent c entering , and is u sed i…
7 Station extensions User Manual SIPLACE CF
7.3 Coplanarity laser module Software Version SR.408.xx 03/2006 US Edition
184
7.3 Coplanarity laser module
7.3.1 Description of the functions
The coplanarity laser module is used to measure vertical bending of the leads. The lead length is
measured without contact using the laser triangulation principle.
The placement head picks up the component to be checked, centers it optically using the IC
camera and moves all four sides one after another over the fixed laser beam of the coplanarity
laser module. In this way, every lead is scanned from below by the laser beam. The laser light
scattered by the underside of the lead is recorded by a sensor, and is then used to calculate the
exact position of the lead with respect to the PCB. The position values thus calculated are com-
pared against the limit value specified by the user. If they exceed this value, the component is
disposed of or returned.
Fig. 7.3 - 1 Laser triangulation measurement principle
7
(1) Receiver lens (2) Detector
(3) Measuring signal (4) Time t
(5) Laser (6) Transmitter lens
(7) Travel direction
User Manual SIPLACE CF 7 Station extensions
Software Version SR.408.xx 03/2006 US Edition 7.3 Coplanarity laser module
185
The coplanarity laser module is combined with optical component centering, and is used in a
vision module. Components with bent or missing leads are detected and disposed of, if neces-
sary.
7.3.2 Technical data
Component range: Can be used for gull wing components, pitch > 0.3
The component size and lead pitch are limited by the component
position detection system, i.e. max. size 43.0 mm x 43.0 mm x
11.0 mm.
Measuring principle: Contact-free measurement by laser triangulation
Algorithm functions: JEDEC standard - calculation of the placement plane; all deviations
are determined in relation to this plane. If the component is angled
with respect to the vacuum nozzle, as can happen if an adapter is
used, then it will have no influence over the choice between ‘good’
and ‘bad’.
Output: < 5 mW
Measuring range: ± 2,5 mm
Laser focus: Elliptical, 50 µm x 95 µm
Thermal stability: ± 1 μm/K
Wave length: 670 nm
Resolution: 0,25 µm
Scanning frequency: 10 kHz
Weight: 500 g
Operating temperature: 0°C ... 40
Atmospheric humidity: 5 - 95 % non-condensing
Ambient pressure: Atmospheric pressure
Vibration: As per IEC 68-2-6
Mechanical shock: As per IEC 68-2-27
EMC: As per EN 50081-2 emitted interference
As per EN 50082-2 immunity to interference
Degree of protection: IP 64
Mech. dimensions: 118 mm x 30 mm x 125,5 mm
Permissible ambient light: 30.000 lx
Safety: The coplanarity laser module conforms to laser class 1, when
installed in the machine. The module will not work when off the
machine unless further devices are installed or the protective
functions are modified. If the protective functions on the device are
bypassed, the machine automatically conforms to
laser class 3B - Risk of injury to eyes and skin
-
and thus requires protective measures to VBG 93.
7 Station extensions User Manual SIPLACE CF
7.3 Coplanarity laser module Software Version SR.408.xx 03/2006 US Edition
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7.3.3 Safety instructions
DANGER
NEVER modify or bypass safety devices on the coplanarity laser module! 7
With no protective measures, the coplanarity
laser module conforms to laser class 3B
(7.3 - 2
)
This means there is a risk of injury to eyes
and skin!
For this reason, you should NEVER
bypass the safety devices!
Fig. 7.3 - 2 Identification for laser class 3B
The following safety devices must be installed on the machine if the laser module is to be oper-
ated in laser class 1 without risk to the eyes and skin:
The interlock line is connected in series with
the switches for the protective hood. This
protective function is maintained even if the
key switch is turned to bypass the protection.
This means that the laser module can only
be used if the machine is closed!
Fig. 7.3 - 3 Identification for laser class 1
Invisible laser radiation
Do not expose the beam
Class 3 B Laser Product
1mW max., 670nm; n. IEC 825-1(1993)
Laser class 1