I. Prepare the endplate:
The mechanical drawings
are
here
- Inner D-ring to endplate sheet (r.h.s. of the jig):
- Put the assembly jig up on some 2x blocks.
- File a notch in the inner D ring. Check the orientation by
placing the D-ring on the jig. The O-ring notch should be down
for both MVD3 and MVD4-type endplates. Place the sheet on the
jig. The pattern drawn on the jig in black makes an MVD3-type
endplate, and green makes an MVD-4 type.
The notch should be filed on the side of the power connectors.
Drawing here.
- Clean the glue surfaces with alcohol to remove grease.
- Place the D-ring on the jig. Check orientation.
- Prepare the glue: Epotek silver epoxy, kept in the chemical
safe in the tent. Mix 10:1 by weight. For the 2 D-rings,
4g should enough.
- Glue the pieces together. This side has
a pair of alignment pins. Place the top pressure plate and bars,
and add a few small clamps in the 3 o'clock region.
- Put the whole assembly into the oven, up on 2x blocks to keep
it clear from the bottom and sides. Cure 2h at 85C.
- Trim protruding sheet with file or scalpel.
- Outer D-ring to endplate sheet (l.h.s. of the jig):
- Clean the glue surfaces with alcohol to remove grease.
Check the orientation of the sheet. The pattern drawn on the
jig in black makes an MVD3-type endplate, green for MVD-4.
- File a smaller notch corresponding to the one in the inner
D-ring. This one only has to be 1mm deep.
Check the orientation: The O-ring notch should be
up for both the MVD3 and MVD4-type endplates.
- Place the D-ring on the jig. The O-ring notch should be
up (down) to make an MVD3 (MVD4)-type endplate.
- Screw the 5 little tabs to the perimeter of the
D-ring, and put fresh teflon tape along the center bar. These
will hold the sheet in place, and prevent gluing to the center
bar.
- Prepare the glue, same as before. Mix 10:1 by weight,
4g should enough.
- Glue the pieces together:
Place the top pressure plate and bars,
and add a few small clamps in the 9 o'clock region.
- Put the whole assembly into the oven, up on 2x blocks to keep
it clear from the bottom and sides. Cure 2h at 85C.
- Trim protruding sheet with file or scalpel.
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- Put the inner and outer assemblies together:
- This is done on the l.h.s. of the jig. Try the alignment:
place the outer ass'y down, and lay the inner ass'y on top.
Two alignment pins hold the inner ass'y in place.
There are 3 small blocks on the bottom plate to fix the
position of the outer ass'y such that all holes line up.
- Prepare the glue and glue the pieces together.
- place pink foam semicircle on the inside; loosen the bottom
plate from the r.h.s. and place it on the foam.
- Tape pink foam on the D-ring
and place the upped pressure plate on the whole stack.
- screw down bars (with longer screws and add clamps to the 9
o'clock position.
- cure in the oven, 2h at 85C.
- Cut extra holes, notches etc.:
- Use a nibbler to cut notches for ejector handles on the
signal cable connectors.
- Drill 6 holes around the perimeter. Use paper template for
positions.
- Cut rectangular hole for jumper block. Use drill, dremel
tool, scalpel.
- cut relief in inner D-ring for a capacitor.
- Glue on the cuff and wings:
- xxx
- xxx
- xxx
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