When specifying a board edge please ensure that if you are designing in Autotrax, Circuit Maker or Protel that the board edge is defined in Mechanical 1 layer.
If you are panelising your board(s) please ensure that there is a minimum of 100 thou between board edges to allow for the router width.
Please also be aware that with any mechanical process there is a tolerance. For rout location, the tolerance is +/- 2 thou and this must be considered when placing tracks and planes near the edge of the board.
It is recommended that a 20 thou clearance from the edge of the board to tracks/planes be maintained to allow for registration and rout tolerances.
If your pcbs are to be scored you need to remember the following things:
- Allow 0.020 clearance from track to edge of board to compensate for the angle of the v-groove tool.
- Because the edge is not square, you must allow for an additional 0.045 increase in the board size.
- When panelising, you must place the PCBs 0.040 apart.