Milling and drilling
ProtoMat M60
39
•
Vitrification of the drilled hole
occurs where the drill stays in
the hole too long once the hole has been made. These holes
then cause problems at feedthrough stage. Reduce drilling times
as appropriate.
•
Drills break
where the drilling base has already been used a
number of times. The drilling base should be changed for every
new PCB. It is not really possible to prevent breakage if a drill
comes into contact with the edge of an existing hole in the base.
Broken tools must be removed from the PCB and the drilling
base. Drills can also break if the tool is too high above the
material. By moving the adjustment valves of the pneumatic
stroke the lowering speed can be adjusted. This prevents the
breaking of drills and increases the edge life of all tools.
• In film milling,
milled channels are uneven
if there is still air
under the film. If the
film
is secured with
elastic adhesive tape
,
waves may form in the film after a while. It is particularly
important here that the milling base should be level (LPKF film
engraving base).
•
Burrs
are produced when milling films either because the tool is
blunt or milling was too deep.
•
Misalignment of the solder and component sides
occurs
where the HOME position is not accurately programmed.
