192277 - Micron Technical Reference Volume 3 - 第19页
RAPID TRANSIT CONVEYOR (R TC) MODULE OVERVIEW Chapter Issue 4, Aug 14 Technical Reference Manual 22.7 Board Cut-Outs The board length dimension programmed into the soft ware sets the distance between the inroad van e and…
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
RAPID TRANSIT CONVEYOR (RTC) MODULE
OVERVIEW
22.8 Technical Reference Manual Chapter Issue 4, Aug 14
The Trailing Edge Cut Out parameter compensates for any difference between
the left hand side of the board and the point that the inroad vane contacts the
board, if different. The parameter is adjustable from 0.0mm to half the board
length in 0.1mm increments.
To prevent the board turning and jamming in the rails, ensure that the remaining
front and rear edges of the board (board length minus cut outs) are 50mm or
greater.
Chamfered or
Rounded Corners
If either the inroad or board stop vanes contact with a chamfered or rounded
corner, this must be treated as a cut out.
Boards with chamfered or rounded corners may jam in the rails if the vanes
contact directly with the chamfering or rounding, pushing the board towards the
rear rail.
Plan View on Board
Board Length
Trailing Edge
Trailing Edge Cut Out
Plan View on Board
4.0mm
(nominal)
4.0mm
(nominal)
Trailing Edge Cut Out Trailing Edge Cut Out