Specifications

Stages in milling and drilling
ProtoMat 95s/II 53
Caution! Check that the board is properly secured before milling.
Switch on the vacuum system.
Ensure that the (36 mm long) LPKF Universal Cutters being used are
sufficiently sharp before you start milling. The milling width is preset in
CircuitCAM
by selecting the isolation track width and the appropriate
tool. The preferred milling width is between 0.2 and 0.4 mm. It is
recommended that you degrease the base material with a cleaning
spray (degreaser for electronic components). This makes it easier to
suction off the millings.
The milling depth must be set as large (deep) as possible in all cases. If
only the extreme milling cutter tip (<0.2 mm isolation) is used, the tool
wears more quickly than with deeper drilling.The LPKF Micro Cutters
can be used to create even finer isolation channels but their service life
will be only approximately 20% of that of the LPKF Universal cutters
mentioned above.
Caution! Do not confuse Micro Cutters and Universal Cutters. It is
only possible to distinguish the two under a microscope.
A milling cutter which produces isolation channels with a rectangular
cross-section has been specially developed for RF technology.
fig. 39: Milling passes using the
LPKF Universal, Micro and
RF Cutters
See the section „Practical tips“ on page 62 for more information.
After machining, the PCB has to be cleaned.
This can be done either in a brush machine or, alternatively, with a
manual board cleaner (LPKF accessories). In either case, the PCB must
be rinsed thoroughly with water to remove any copper dust produced by
brushing.
After rinsing, the PCB must be dried thoroughly (air drier) and then
protected against oxidation by a soldering varnish.