Specifications

ProtoMat 95s/II
Manual
43
6 Stages in milling and drilling
6.1 Securing the PCB on the machine bed
Make 3.0 mm or 3.05 mm diameter congruent registration holes in the board material and
drilling base in the x-axis.
This can also be done with any bench drill. Please note that the diameter decreases during
galvanic through-hole plating.
Tip:
The drilling base should be drilled to a larger diameter, such as 5 mm, to
allow for inaccuracies in the registration holes.
Move the plotter head to the P
AUSE
position. Insert alignment pins in the front and rear
registration hole strips.
It is essential that you make sure the front registration hole strip in the machine groove is
pushed against the reference pin at the front.
Position the previously drilled base material and drilling base over the alignment pins.
The format of the board material should be selected so that the registration hole strip does
not need to be moved more than 10 mm. Moving the registration hole strip more than 10 mm
reduces the accuracy of the registration hole system.
Now additionally secure the board material in this position on all four sides with adhesive tape
(we recommend Tesakrepp 5250).
This prevent the corners of the board bending up.
1
2
3
4
5
6
Securing the board
1.
Machine bed (aluminium base plate)
2.
3 mm diameter alignment pins
3.
Board material approximately 1.6 mm thick
4.
2 mm thick drilling base
5.
Adhesive tape
6.
Registration hole strip
The alignment pins hold the PCB in position.
They also act as a reference point when double-sided boards are turned.
The adhesive tape holds the board down at the edges. This is particularly important for
contour milling.
Tip:
Very thin board material may be secured with spray adhesive to ensure
perfect flatness
It is important that no adhesive tape, drilling or milling swarf is left between the individual
layers to ensure that the board material lies absolutely flat. Small particles under the board
material have an adverse affect on the uniformity of the milling depth.
Caution
Switch on the vacuum system.
Bear in mind that the vacuum filter might need be changed.