The Craftmans Shop > New from Old
The Sequel - Oh Blimey I bought a CNC Lathe (Beaver TC 20)
hermetic:
Look out for capacitor filter arrays that are centre tapped to ground, but if it has been stood in a damp shed for a few months, it may just be moisture, good luck with it Andrew. A new saga begins!
awemawson:
I'm rather hoping that the earth leakage is tied in with the controller not showing life - maybe it's internal PSU. Going over to have a gander shortly when my supper has settled :thumbup:
awemawson:
So back to it, objective being to get to the back of the controller. It's in a pretty well totally sealed box apart from the Operators Panel (below) and a filtered vent hole to the right.
I started by removing all the numerous screws retaining the Operators Panel, and noticing that one corner is broken but all bits there for later gluing. Having pulled the panel forward revealing the expected backs of switches, cables etc I noticed a small wet patch of brown liquid that obviously had come from above. There is only the control above and no way water falling on top of the machine could get to here as it is a solid box. Burst Capacitor or Battery I'm thinking at this point.
OK put the panel back and attack the Controller. Removing all it's screws there is no away it will pull out.
j1312v:
Sorry Andrew, because of the "ew" at the end all Matthews and Andrews are the same in my head :doh: don't know why :scratch:
Good luck finding that earthed bit on the machine, one think that helps is to disconnect, clean and reconnect... :dremel:
awemawson:
To get better visibility I removed the filter from the vent and shone a torch in revealing a niffty bracket along the top of the controller stopping it sliding forward.
It was at this point I dropped the torch inside and no way could I get my fingers to it :bang:
However feeling about inside as far as I could reach I discovered some Bakelite knurled headed screw knobs holding the surrounding panel in place. They were far too tight for hand unscrewing, and gripping them with pliers took some major contortions but they all came off in the end allowing me to unscrew the panel, get my hand in further to rescue the torch, and also see that the square holes under the controller were obviously intended to support a temporary shelf to pull the controller onto.
I cut some 3/4" square bar to make two supports for a bit of surplus aluminium plate as a shelf, and reached in and was able to unscrew the retaining bracket
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