First searched the house for the dividing-head tailstock as I'll need to use that with a rotary-table for machining my wagon's crank-shaft. Found it!
Then attended to the cross-travel lock on the milling-machine.
The DRO revealed that when centre-drilling the ends of the crankshaft blank, the cross-travel was creeping by some 2-3 thou' just by these low drilling forces. (The blank being clamped vertically to an 8-inch long angle-box, just gave sufficient room for facing and centre-drilling with the tools in R8 spindle-collets.)
Investigating, I discovered the lock, which is not at all easily accessible, was not locking!
Then it was case of one thing after another…
The lock is a short rod with cross-pin handle, and a 5/16"BSW threaded spigot. This was some half-inch too short to reach the back of the gib, and oddly, looked as if cut off with a grinder. On the other hand half-inch would be too long for an anti-burring slug – IF the lock ever had one.
Removed the wiper mouldings and retainers as they interfered with the gib adjusters.
Removed and cleaned the gib.
Rooted through a come-in-handy box, found a suitable temporary lock – an old clevis with long tail of the right thread. I can worry about a tidier replacement later, especially as the vertical-slide locks need replacing too.
Nor had the long-travel locks, locked; I found and corrected with small slugs a while ago. These had looked as if hack-sawn short!
Re-fitted the gib and adjusted it, slightly tighter than previously.
Then found the wipers and retainers needed the holes for the adjusters filing oval as they had been made (by the factory) so far off-centre they would not go over the adjuster screws, now protruding from the slide.
Next, having to had remove the special conduit clamp I'd made for the long-travel encoder, it was an absolute rude-word to refit. So modified its mounting slightly. Refitted it.
Phew!
Stopped for a brew and to see who's done what today in their workshops!
Can I get on with the crank-shaft now?