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User Manual HS-50 1 Introduction Software Vers ion 5.01 01/99 Issue 1.13 Overview of the modules - revolver head 41 2YHUYLHZ RIWKHPRGXOHVUHYROYHUKHDG 6WUXFWXUHRIWKHVHJPHQWUHYROYHUKH DG 1. Sta…
1 Introduction User Manual HS-50
1.12 Overview of the modules - gantries Software Version 5.01 01/99 Issue
40
The y axis essentially consists of the following main modules:
– y axis linear drive with permanent magnet (1) and adapter plate (2)
– y axis guide system
– y axis measuring system
The y axis is driven by a linear motor. The secondary part of the drive is made up of permanent
magnets and is mounted on the machine frame. The primary part is bolted to the gantry
(adapter plate). An anti-crash circuit prevents the traversing paths of the gantries meeting.
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Drive Direct, linear motor
Maximum speed 2.5 m/sec.
Traversing path of the gantries. calculated from Gantry 1 - 688.5 mm
the center of the machine: Gantry 2 - 768.5 mm
Gantry 3 - 688.5 mm
Gantry 4 - 768.5 mm
Distance measuring system Metal linear scale
Scale length 1530 mm
Resolution 1 µm
User Manual HS-50 1 Introduction
Software Version 5.01 01/99 Issue 1.13 Overview of the modules - revolver head
41
2YHUYLHZRIWKHPRGXOHVUHYROYHUKHDG
6WUXFWXUHRIWKHVHJPHQWUHYROYHUKH DG
1. Star with 12 sleeves 4. Component vision system
2. Motor for "Reject" valve adjustment drive 5. Z axis drive
3. Turning station 6. Star motor
1 Introduction User Manual HS-50
1.13 Overview of the modules - revolver head Software Version 5.01 01/99 Issue
42
All the components are inserted with the same cycle time. Before the component is inserted,
it is measured by the optoelectronic vision system.
– The component vision camera creates an image of the current component.
– The precise position of the component is also determined.
– The package form of the current component is compared against the programmed pack-
age form in order to identify it. Any components that cannot be identified are rejected.
– The turning station turns the component to the required placement position.
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– The 12-segment revolver head works using the "collect & place" principle, i.e. the compo-
nents are held by the nozzles with the aid of a vacuum and, after one complete pick-up cy-
cle, are placed gently and accurately on the PCB with the aid of forced air. The vacuum in
the nozzles is also checked several times to determine whether the components were
picked up and set down correctly.
– The "adaptive" sensor stop mode of the z axis compensates for any irregularity of the PCB
surface when the components are set down.
– Defective components are rejected and are picked up again during a repair run.
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Range of components
0402 to PLCC44, including BGA, µBGA, flip-chip,
TSOP, QFP, PLCC, SO to SO32, DRAM
Maximum height 6 mm
Minimum lead pitch 0.5 mm
Minimum dimensions 0.5 mm x 1.0 mm
Maximum dimensions 18.7 mm x 18.7 mm
Maximum weight 2 g
Maximum travel of the z axis 16 mm
Programmable set-down force 2.4 to 5.0 N
Nozzle types 7xx
Benchmark placement speed 12,500 components/hour
Angular accuracy 0.7° at 4 sigma
Placement accuracy ± 90 µm at 4 sigma
± 135 µm at 6 sigma