192277 - Micron Technical Reference Volume 3.pdf - 第18页
RAPID TRANSIT CONVEYOR (RTC) MODULE OVERVIEW 22.6 Technical Reference Manual Chapter Issue 4, Aug 14 Board Specifications The R TC system can accommodate th e following board specificatio ns: • Minimum Board Size - 50mm …
RAPID TRANSIT CONVEYOR (RTC) MODULE
OVERVIEW
Chapter Issue 4, Aug 14 Technical Reference Manual 22.5
Rail Width The rear print station rail is driven by a CAN Bus servo motor which sets the rail
width for the board. At transport height, the rear print station is dovetailed to the
rear inroad and rear outroad conveyors therefore moving with the print station
as the rail width is set. During the print cycle, the print station is separated from
the inroad and outroad conveyors. To prevent the conveyors moving during the
print cycle, pneumatic rail width clamps secure the conveyors to the base frame
of the RTC rail system.
Board Clamping The print station can be fitted with one of the following board clamping arrange-
ments:
• 380mm Board Clamps
• Foil-less Clamps
Foil-less clamps are utilized for thin pliable boards where there is a requirement
to print close to the board edge. The foil-less clamps are assisted with the use
of a vacuum box beneath the product board.
Figure 22-3 Board Clamping Arrangements
Board Clamps
Foil-less Clamps
Board
Board
Rear Board Clamp
Rear Foil-less Clamp
Front Board Clamp
Front Foil-less Clamp
RAPID TRANSIT CONVEYOR (RTC) MODULE
OVERVIEW
22.6 Technical Reference Manual Chapter Issue 4, Aug 14
Board
Specifications
The RTC system can accommodate the following board specifications:
• Minimum Board Size - 50mm (length) by 40mm (width)
• Maximum Board Size - 375mm (length) by 254mm (width)
• Board Thickness - 0.4mm to 5.0mm
• Maximum Board Weight - 0.5kg
• Under Board Clearance - 25mm
NOTE
Dedicated or Grid-Lok tooling must be used for boards greater than 295mm in
length.
ASM recommends that the board length exceeds the board width when trans-
porting boards through the RTC system.
Under Board
Components
When printing on a board with components on the underside, sufficient gap from
the front and rear edges of the board must be component free to allow for
transport belts and vanes.
Plan View on Board
6mm
5mm
Front Edge
Rear Edge
RAPID TRANSIT CONVEYOR (RTC) MODULE
OVERVIEW
Chapter Issue 4, Aug 14 Technical Reference Manual 22.7
Board Cut-Outs The board length dimension programmed into the software sets the distance
between the inroad vane and the board stop vane.
The distance between the two vanes might be different to the board length in
the following circumstances:
• The board has cut-outs that coincide with the vanes
• The board is not square or rectangular
• The board has rounded or chamfered corners
If the board length is present where the vanes contact the board, as in the
graphic above, the remainder of this section may be ignored.
The board length dimension programmed into the software must be the overall
length of the board. Any cut-outs that coincide with the board stop vane or the
inroad vane must be compensated for using the Leading Edge Cut Out or
Trailing Edge Cut Out parameters.
The Leading Edge Cut Out parameter compensates for any difference between
the right hand side of the board and the point that the board stop vane contacts
the board, if different. The parameter is adjustable from 0.0mm to 50.0mm in
0.1mm increments.
Plan View on Board
Board Length
Board Stop VaneInroad Vane
2.5mm (nominal)
1.5mm (nominal)
Plan View on Board
Board Length
Leading Edge
Leading Edge Cut Out