RS-1_instruction manual.pdf - 第68页
Part 1 B asic O peration Chapter 1 Overv iew of the Machine 1- 50 (2) Laser a lign me asureme nt posi tion for major c ompone nt ty pes Mold Square chip MELF SOT SOP/ TSOP SOJ (Center between the top and bottom surfac es…
Part 1 Basic Operation Chapter 1 Overview of the Machine
1-49
(1) Flow of laser align centering
1) For LNC120-8
①
②
③
④
⑤
⑥
Part attracting
Pick the component by driving
Z-axis, and adjust the
component at laser align height.
Rotation in θ direction starts.
While the θ-axis is accelerating, the system
does not start measuring a component.
Laser align measurement
Edge
When the speed of the rotation in θ direction
reaches the certain value, the system starts
laser align measurement.
Placement
The sensor obtains the edge position of the
area shadowed by a component.
The system saves a beam corresponding to
the edge position as a “tangent line” into the
sensor.
The system obtains the tangent line data on
each angle by rotating the θ axis 360
degrees.
When the θ axis finishes rotating by 360
degrees, the sensor generates and
analyzes the outer shape of a component
based on the tangent line data obtained at
each angle to return the measurement
result to the mounter.
- Component size
(X direction: wX Y direction: wY)
- Distance between the center of the
nozzle rotation and the center of a
component
(X direction: dX Y direction: dY)
- Angle (θ) error: dRz
The system corrects the following errors
and places a component on a board.
Positioning error (dX, dY)
Angle error (dRz)
Part 1 Basic Operation Chapter 1 Overview of the Machine
1-50
(2) Laser align measurement position for major component types
Mold
Square chip
MELF
SOT
SOP/TSOP
SOJ
(Center between the top and bottom
surfaces of the component)
(Center of the component)
(0.25 mm above the top of the component)
(Center between the bottom surface of the
component and the foot of the leads)
(Center between the bottom surface of the
component and the foot of the leads)
Laser align
measurement position
Laser align
measurement position
Laser align
measurement position
Laser align
measurement position
Laser align
measurement position
Part 1 Basic Operation Chapter 1 Overview of the Machine
1-51
OFP/BQFP
PLCC
Electrolytic
capacitor
(Between the bottom surface of the
mold and the foot of the leads)
(0.35 mm from the bottom surface of the mold)
Mold
Laser align
measurement position
(Center of the vertical section of a foot)
Laser align
measurement position
Laser align
measurement position
0.35