Procedures for milling and drilling
ProtoMat C30/C30-S
43
10.10 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.
Note: Set the milling depth using an edge area of the solder-stop
sheet which is not used. Use the arrow 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.
10.11 Milling layout films
fig. 29: LPKF HF milling cutter
Layout filmscan be machined with LPKF HF milling cutters.
› Secure the film base (plexiglas or glass sheet) onto the machine
bench with Tesa tape.
› Lay the film material on the base with the coated (matte) side facing
upwards.
› Now flatten the film material out firmly flat and on the film support,
expelling any air completely.
› Now stick down the film on all four sides with a non-stretching
Содержание ProtoMat C 30-S
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