Specifications

44
Manual
ProtoMat 95s/II
6.2 The mechanical working depth limiter
Caution
Keep your fingers clear of the machine's traverse range during operation.
It is particularly important that you keep the milling depth constant when milling isolation
channels in board materials which tend are often slightly curved. This is achieved by the
pneumatic working depth limiter on the LPKF ProtoMat 95s/II.
This provides the following benefits:
1.
The working depth limiter works on a non-contact principle since the compressed air
escapes on the underside and causes the working depth limiter to move on an air
cushion.
2.
The depth limiter rides on the surface of the material. The working depth limiter follows
warped PCBs.
3.
The material is held down within certain limits by the working depth limiter.
The head is raised and lowered pneumatically.
1
2
3
4
5
6
LPKF ProtoMat 95s/II working depth limiter
1.
Holding plate
2.
Knurled nut used to set milling depth
3.
Retaining block for working depth limiter
4.
Suction nozzle
5.
Tool fixture (collet)
6.
Compressed air connection
Milling depth is set by adjusting the knurled nut (2) on the working depth limiter.
Turning the wheel clockwise increases the milling depth and also the milling width in the case
of LPKF universal milling cutters due to their conical shape.
Turning the wheel counter-clockwise reduces the milling depth.
The milling depth is altered by approximately 4 µm for each click of the wheel.
Turning the wheel counter-clockwise is easier than turning it clockwise, particularly when the
head is lowered.