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| Titivating a Wire EDM Machine |
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| awemawson:
OK that hurdle jumped I had the confidence to start on the other end of the arm and strip off it's water feed and electrical connections |
| awemawson:
So now I could withdraw the rather stiff and brittle water feed pipe and co-axial screened power feed wires which are threaded through the arm assembly. Last remaining bit to take off was the 'wire break detector' which is simply a microswitch with a long wire actuator that has a ceramic tube threaded on it. This was one of the bits that I'd fixed when I got the machine. A previous owner had just cut it out of circuit when it failed :bugeye: |
| awemawson:
OK so now the arm bolts can be removed to free the arm. Easy enough and I was surprised to find that in fact there are no locating dowels for the flange - just a 'shelf' that it rests on. |
| awemawson:
So what was revealed ? Well as I expected rather a lot of corrosion - in fact it looks a horrid mess! Have some pictures: |
| awemawson:
Now none of the corrosion gives any structural issues, but no doubt undoing some of those cap head screws holding the blue insulator will be 'fun' I decided, true to form, to dunk it in a bucket of warm citric acid solution for a few hours and see what happens. Never used it before with stainless steel. |
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