With that done the angle plate should be mounted conventionally onto the machine
table and the long edge also finish machined, This to ensure that it is parallel
with the angle plates base. Repeat for the other long edge.
At this time I started to consider the painting stage and decided the rear of the
casting would need a lot of attention, such as filling the cavities, if they were
to look presentable after painting. I did not warm to this idea so belatedly decided
to machine the rear of each one, Photograph 17.
I did not expect perfection as a few of the blemishes were quite deep and would have
needed rather more metal removed than I would have liked, in particular in view of
the next modification I am detailing. However, if the viewer also chooses to machine
the rear of the casting this should be done prior to finish machining the face, that
is prior to Photograph 9. The reason for this is that at this stage the casting may
move a little and the face then no longer being flat, though in my case I could not
The working face of the angle plate has just three slots with one at either end being
quite close to the casting's edge, necessary, due to the lugs on the rear. However,
this will make it difficult to find a surface onto which packing for the outer end
of a bar clamp could be placed and I felt this would make it difficult to secure
a workpieces in some cases and considered adding two further slots
Even so, I was not confident that this will provide the adaptability that I would
be looking for and considered the possibility of adding T-slots, Photograph 18 showing
that this is what I eventually did. Should the viewer wish to take the same approach
then the casting will have to be set up as previously seen in photograph 9.
First, the central leg of the T-slot should be made to its full depth followed by
using the T-slot cutter to produce the arms and just skim the base of the central
leg. Do machine one slot fully at a time as if all three legs are made it will then
be necessary to return and individually realign the machine spindle with each one
when the arms are made.