Specifications

ProtoMat 95s/II
Manual
49
6.7 Milling wide isolation channels and rubouts
Double-edged cutter (end-mill)
Wide isolation channels and rubout areas (the removal of areas of residual copper) can be
created using 36 mm long double-edged cutters.
Various diameters are available (0.8 mm, 1 mm, 2 mm, 3 mm) depending on the size of the
residual copper area to be removed.
The milling depth must be set such that only minimal burring results when the copper is
removed. The 3 mm double-edged cutter is particularly well suited to milling very wide
isolation channels (VDE codes of practice).
6.8 Front plate engraving
Top: Double-edged cutter. Bottom: LPKF Universal Cutter
Set the traverse speed as appropriate for the engraving depth and the material when
engraving. Use an LPKF Universal Cutter or LPKF double-edged cutter.
Caution
Switch on the vacuum system, even when engraving.
6.9 Milling solder-stop sheets
Create the pads in solder-stop sheets using a Unimill 100 Micromill with a tool diameter of
0.15 mm.
The speed should be set to 20,000 rpm and the advance to 5 mm/s.
Tip:
Set the milling depth using an edge area of the solder-stop sheet which is not
used. Use the traverse buttons in BoardMaster to mill a 2 x 2 mm square
with the motor switched on and check the depth.
Once the milling depth has been set, start the milling procedure using the file prepared by
CircuitCAM.
At the end of the milling procedure, check that all the pads have been cut out. Start the
milling procedure a second time if this is not the case.