The Craftmans Shop > New from Old
The Sequel - Oh Blimey I bought a CNC Lathe (Beaver TC 20)
hermetic:
Nice Job Andrew! It seems like these CNC machines (of which I have zero experience) suffer from the same disease as modern motor cars, the electronics pack up long before the mecanicals wear out, and this makes them an uneconomical repair, because few know enough (me included) to repair at board level, and boards are expensive!. Can't wait to see it spinning! Having said all that, I often find myself repeating an old mantra that was hammered into me when I was an apprentice, "Don't always assume that the fault is complex, and Dont always assume it is in the electronics"! My wife has a mild form of motor neurone malfunction, and the other day her stairlift quit. I tore into it with the AVO, and was baffled.........untill I ticked myself off for not lifting one end of the fuses when I was testing them, and sure enough, an aged fuse failure, quick repair with 5a fuse wire (6.5a fuse) proved that there was no excessive current, and it has worked faultlessly since.
Phil.
awemawson:
Thanks Phil, glad the stair lift is working again :thumbup:
Clean clothes called for this afternoon as guests arriving, so as an exercise I drew up a 3D model of a 'blanking plug' for the Tool Turret. In an ideal world I would have blanked of each open hole before using the wire brush, but had no blanking plugs. They seem astronomically priced at about £30 each - so my Cetus 3D printer is cranking one out as I type.
It's an interesting tool clamping system. The 40 mm diameter spigot has a rack of 4 mm pitch cut into it. The spigot enters the hole in the tool turret, and as you rotate the 8 mm hex locking key, an internal rack advances and engages the spigot pulling it tightly against the reference flat on the tool turret. There is a dowel to ensure alignment, and a pick up for 'through coolant'. System seems to work quite well.
awemawson:
I escaped this evening "to see how the 3D printing is going" and managed to clean up the Tool Disk of the Tool Turret - this is the big round thing with 40 mm holes in it that takes the VDI40 tooling.
It was mainly baked on coolant, but the odd spot of rust. Fine wire wool and neat IPA shifted most of it, followed by 1800 grit silicon carbide paper and WD40 - came up as perfectly serviceable :thumbup:
. . . the 3D printer - oh yes - it still has 90 minutes to go but looking good
nrml:
I am getting the impression that compared to the Traub, this lathe is poorly designed as far as the ergonomics of serviceability and choice of some components (like powers supplies) goes. Is this merely related to the age of the machine or does it confirm the stereotypical ''superior German engineering'' myth?
awemawson:
Well the Cetus finished making what it was told to make - pity I forgot to include the location hole in the 3D model :bang:
Never mind, nothing a drill won't sort out ! Hole drilled and blanking plug fits nicely.
So this morning I re-worked the 3D model including the missing hole, and put a few chamfers here and there to tidy it up. Mk2 printing as I type :ddb:
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version