The Craftmans Shop > New from Old
The Sequel - Oh Blimey I bought a CNC Lathe (Beaver TC 20)
awemawson:
This morning I repeated the test on the individual Proximity module under slightly more controlled conditions, and sure enough it's still faulty. Loaded with 4K7 ohm / 5 mA it takes a matter of seconds before it ceases to work - specification is I(max) of 125 mA. Dowsing it in IPA and blowing with an airline to cool it by extracting the latent heat of evaporation it returned to the working state, then again rapidly failed.
I took the opportunity to blow out the chamber where it lives and take a photo of the 'pegged drum' or Hedgehog that encodes the tool position in binary. It also shows the clutch disk that is used to rotate the turret to the appropriate tool, currently in the disengaged state.
(The same AC Servo motor is used to both rotate the turret to the right tool, and drive the Powered Tooling )
. . . sorry about the blurry pictures but it's a bally difficult place to get a camera at - I did try with my WiFi endoscope but it was even worse !
awemawson:
Chap in Germany has now accepted my order for the Balluff proximity module and is posting today, so hopefully later this week it can go back together. Actually I bought two, so one to put in the spares box :thumbup:
I found an hour after lunch to attack the internal fluorescent light in the lathe. It was absolutely filthy - the pictures don't do the grime justice. The upper surface was a good half inch thick with a concretion of brass swarf. I'd hoped to be able to take it down to clean it, but no such luck. Where the cable goes through the roof at the tailstock end is inaccessible on the other side without major dismantling. I got it off it's brackets which let me get to the rear. It should really have one of those circular military style plugs and sockets to allow removal to change the tube - maybe a mod for the future.
Hats off to Mr Muscle - I would usually use IPA to dissolve and soften caked on oily bits, but the tube in which the light tube lives, is almost certainly Poly-carbonate, which I know cracks like fury if wiped with IPA. The Mr Muscle did an amazing job so has gone on the list of workshop cleaners !
Remember - these 'filthy' pictures don't look half as bad as it was !
Pete.:
I reckon that's why the turret wasn't working properly Andrew - it couldn't see what it was doing :lol: :lol: :lol:
awemawson:
Very Droll :clap:
Well MORE developments - I've re-made contact with a friend I had years ago but lost touch with - from his garage he has unearthed (amongst many other goodies) a BRAND NEW four position Balluff proximity switch and also one of those field coil drive cards ! (which he designed !!!!! )
nrml:
I guess its karma paying you back :thumbup:.
BTW why not a LED strip light like the Traub? Better lighting for the obligatory videos when the project is finished.
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version