Sunday, March 12, 2017
Milling the Slots
I kept reusing the same 1/8" thick sheets until I could not tell which trial holes were modern and which were old, so I used some .050" sheet:
Yes, one slot isn't all the way through. The sheet is flexible enough that it wouldn't stay flat on the table. Actually even the 1/8" is too flexible once you are off the edge of the mill vise supported area, so in both cases I have a 1/2" thick support under the entire length. I may use small C-clamps to lock the sheet to that 1/2" base next time.
Here's the slotted base that has to approximately match these slots:
As should be obvious, this is a new ScopeRoller product.
Here's some video working on a badly reused plate. Not beautiful video but it shows the slot being milled::
I also discovered part way through cutting the 1/8" thick sheet that it had vibrated the gib guide wire setscrew loose again. I will now tighten that screw each time I cut; only slightly difficult to get to. Perhaps some Loctite next time.