LPKF ProtoMat 93s Manual
16
3.6 HOME-Position and two-pin system
The HOME position must be on the machine's X axis (two-pin system) to
guarantee alignment of a double sided board. The data for the bottom side of a
PCB is mirrored around the X axis and therefore the board must also be rotated
around the X axis to maintain registration. Inaccuracies in the HOME position
result in a displacement during machining of double-sided boards after the
rotation.
Note:
The two-pin system is parallel only for the current position of the two-pin strips.
The front two-pin slide must be placed against the pin in the groove ( reference ).
If base material of different sizes is used, an additional hole must be drilled in the
strip of the back for every format. To do this, move from the home position in
direction of the rear strip, displace it to the desired position and drill an additional
hole by hand, using the 3 mm drill. The position of the new holes should recorded
or marked at the plotter. This will help when drilling the reference hole in various
size material.
