ACT - Accuracy Check Tool mit SSW 6xx User Manual 2017.pdf - 第70页
ACT with SSW 6xx / User Manual 07/2017 Edition 6 1.3.3 Principle of ACT Measurement Placement of glas s components or ce ramic component s (Cerampads) on a gl ass plate with reference fidu cials ( Abbildung 1 -1 ). Glass…
ACT with SSW 6xx / User Manual 07/2017 Edition
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1 Introduction
1.1 Safety information
WARNING
Follow the safety instructions!
The safety instructions in the chapter Operational Safety of the operating manual and
service manual take priority.
1.2 ACT (Accuracy Check Tool)
The ACT is used to determine the placement accuracy of a specific placement head and, where
necessary, to correct this. To do this, special components are first placed on a glass mapping plate
and the plate is then measured. The offset determined (prescribed coordinates – placement
coordinates) is then taken into account during each subsequent placement operation, which
ensures that the placement head places components with the specified accuracy.
1.3 Technical data of the ACT
1.3.1 Properties
● Evidence of placement accuracy.
● Correction of X/Y and angular offset.
● Top-quality measurement without external measuring devices or additional machines.
● Measurement of placement accuracy without illumination table.
1.3.2 Technical Data
The measuring time per gantry for the ACT depends on the head type and the component used:
● Head with glass components approx. 60 seconds.
● Head with ceramic components (Cerampads) approx. 40 seconds.
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1.3.3 Principle of ACT Measurement
Placement of glass components or ceramic components (Cerampads) on a glass plate with
reference fiducials (Abbildung 1-1). Glass or ceramic components are used, depending on the
camera type.
● Position measurement of the placed components on the glass plate.
● Automatic determination of offset in x, y and θ.
● Storage of corrections in the relevant machine data.
Figure 1-1: Principle: Measuring plate with glass and ceramic components
Key:
(1) View window of PCB camera (4) Glass measuring plate (300 x 200 mm)
(2) Ceramic component (Cerampad) (5) Reference fiducials on the measuring plate
(3) Glass component (6) Reference fiducials on the glass component
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Figure 1-2: Drawing of ACT plate
Example of glass components:
Key:
(1) x-, y, θ offset
(2) Glass component
(3) Reference fiducials
Figure 1-3: Relative position (offset) of component to the outer fiducials on the glass plate (example of glass component)
Example of ceramic components (Cerampads):
Key:
(1) x-, y offset
(2) Reference fiducials on the ACT
measuring plate
Figure 1-4: Relative position (offset) of component to the outer fiducials on the glass plate
(example of ceramic component (Cerampad))