Next, with the machined base against the posts and the machined side against the
vertical slide, machine the second side. Depending on the length of the posts you
may need to place a parallel between the block and the slide,s face. This is essential
as the face about to be machined must be parallel to the other side. Having rough
machined the three faces, repeat the above setups, taking only very light cuts, to
improve the finish and accuracy. Photograph 2 shows that with only a light cut being
taken I opted for using two lightweight toolmakers clamps.
Photograph 3 show the vee block now held in a vice. This is also featured as a lathe
only project on the site, though of course, any vice large enough that will fit on
the vertical slide will be suitable.
Mount the vice, with vee block, on the vertical slide, and machine the top surface
and the extensions on either side. You will need to insert parallels between the
vice and the base of the vee block. Working in the vertical plane makes positioning
parallels a little difficult, a third parallel between the two main ones overcomes
Rotate the vee block in the vice, setting it square as in Photograph 4. Machine the
ends of the extensions and the vee block section, Photograph 5. You may like to consider
reducing the overall length so it can be mounted between tee slots on your vertical
slide, see Photograph 6.
I have had no previous experience with this type of block and considered, is it normal
for it to include some method of clamping the workpiece, as do the more common versions
that have a clamp with a central screw? Either way, I concluded that it would be
a worthwhile addition and decided to drill and tap two holes between the two sides
on the vee block, these could be used with studs (I used M8) and a bar type clamp
as the previous picture shows. Having chosen quite arbitrarily to drill and tap these
at this stage I was unaware how soon they were to become useful.
I had decided how I was going to machine the vee's but tried many methods, all theoretically
possible, but none allowed me to get the vee block into a suitable position for machining.
This was a typical example of the problems when working with a vertical slide.