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| Titivating a Wire EDM Machine |
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| awemawson:
OK that was painless - now we need to do a full width test - actually this bit is a bit wider than the cover bits that I need to joggle. Too big for the vice I think so lets use the workshop press |
| awemawson:
That was about 25 tons - probably a bit enthusiastic as the mill scale marks came through on the aluminium :ddb: Anyway it seemed to work ok |
| awemawson:
So now I need to pluck up courage to do the actual bits on the cover, but first I need to convince myself that I can afford to lose the length from the cover that the joggle will gobble up - need to take some measurements |
| awemawson:
Tests & measurements completed here are the results. Total loss of length having joggled a piece of 2 mm aluminium = 1.78 mm Extra free movement available = about 5 or 6 mm - phew ! The length loss at 1.78 mm is far less than I'd expected - odd things happen when you bend sheet metal ! The cover slides in the (say ) Y axis and is limited by its down turned flange coming against the 'kerb' on the machine base, the cover needs to be able to move for the full axis travel plus a bit of leeway - that is where the 5 or 6 mm comes from and to increase it would mean less overlap of the joggles - the joining holes are already drilled but one cover could easily have elongated slots if things are tight. I can imagine that the cover arrangement is not perfectly square so leeway may need to be increased. Doing this exercise reminds me that one kerb is still missing - bar stock not yet arrived ! |
| awemawson:
Unusual to have a metal delivery on a Saturday, but I'm glad to say the aluminium flat to make the missing 'kerb' arrived this morning in a torrential downpour. Simple matter of cutting to length and accurately drilling and countersinking six 4 mm holes to match the exiting tapped holes in the machine - one of those 'easy' jobs that sometimes go horribly wrong, but today the gods were smiling down on me and it all fitted perfectly :ddb: |
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