X3_X4_Series machine.pdf - 第434页
7 Station extensions User manual SIPLACE X-S eries 7.12 Coplanarity laser module Software Version S R.601.xx 11/2005 US Edition 434 and is then use d to cal culate t he exact p osition of the l ead with respec t to the P…
User manual SIPLACE X-Series 7 Station extensions
Software Version SR.601.xx 11/2005 US Edition 7.12 Coplanarity laser module
433
7.12 Coplanarity laser module
Item no. 00119719-xx
7.12.1 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.
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Fig. 7.12 - 1 Laser triangulation measurement principle
(1) Receiver lens
(2) Detector
(3) Measuring signal
(4) Time t
(5) Laser
(6) Transmitter lens
(7) Travel direction
The TwinHead picks up the component to be checked, centers it optically using the component
vision camera (see section 7.3
, page 411) 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,
7 Station extensions User manual SIPLACE X-Series
7.12 Coplanarity laser module Software Version SR.601.xx 11/2005 US Edition
434
and is then used to calculate the exact position of the lead with respect to the PCB. The position
values thus calculated are compared against the limit value specified by the user. If they exceed
this value, the component is disposed of or returned.
The coplanarity laser module is used in combination with the optical component centering mode.
Components with bent or missing leads are detected and disposed of, if necessary.
7.12.2 Technical data
Component range: Can be used for ’gull wing’ package forms, spacing > 0.3 mm
and maximum component size 55 x 55 mm². Other restric-
tions are associated with the machine configuration.
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 com-
ponent 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’.
Measuring range: 3 mm
Start of measuring range (SMR) 24 mm
Reference distance
(Middle of measuring range MMR) 25.5 mm
End of measuring range (EMR) 27 mm
Linearity ± 1.5 µm
Resolution: 0.15 µm
Measuring rate 10 kHz
Wave length 670 nm, red
Max. output 1 mW
Laser class 2
Permissible ambient light: 30,000 lx
Light spot diameter SMR 80 µm
MMR 35 µm
EMR 80 µm
Operating temperature: 0°C ... + 50°C
Storage temperature - 20°C ... + 70°C
Sensor protection class IP 65
Controller protection class IP 50
Supply voltage 24 VDC (± 15%, max. 500 mA)
Output, digital RS 422, 687.5 kBaud
User manual SIPLACE X-Series 7 Station extensions
Software Version SR.601.xx 11/2005 US Edition 7.12 Coplanarity laser module
435
Electromagnetic EN 50081-1 and
compatibility (EMC) EN 61000-6-2
Vibration 2 g / 20 ... 500 Hz
Mechanical shock 15 g / 6 ms
Weight of sensor approx. 0.5 kg
Weight of controller 1 kg
7.12.3 Safety instructions
The sensor works with a semiconductor laser of wave length 670 nm (visible/red).
The maximum optical output is ≤ 1 mW.
The sensor is classified as laser class 2.
– When operating the sensor, always follow the relevant regulations of VDE 0837 concerning
"Radiation safety for laser equipment" and German accident prevention regulation entitled
"Laser radiation" (VBG 93).
– Also follow the accident prevention regulations applicable in your country.
As a precautionary measure, an audible or visual warning should be emitted to signal that the la-
ser is in use.
The following information plates are attached to the front and back of the sensor housing:
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Fig. 7.12 - 2 Identification of laser class 2 for the sensor
The working laser is signaled by an LED (see Section 7.12.5).
NEVER look directly into the laser beam, despite the low laser output. The beam is visible, so the
eyes will be protected by the natural eyelid-closing reflex.