| The Craftmans Shop > New from Old |
| The Sequel - Oh Blimey I bought a CNC Lathe (Beaver TC 20) |
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| modeng200023:
That is real progress Andrew :clap: |
| awemawson:
Yes John, it's a bit of a relief to have actually machined something at last ! Of course the actual female A2-6 taper will be 'added' (subtracted really!) on the manual lathe. |
| tom osselton:
Good to see it done. |
| awemawson:
Only PART done Tom ! So this morning I made six off 12 mm location dowels, threaded M6 axially for insertion and removal. These dowels in theory should be below the next stage of milling and thus untouched, but although I don't know what steel they are made from (rescued shaft from a printer!) it isn't as hard as the EN19T billet so not an issue if it gets bitten. I threaded them all the way through just in case they get their heads cut off!) Then I slackened the welded up clamping ring from the spoil plate to allow it to move a tad, and then lowered the inverted billet onto the dowels. Having added extra hold downs for the spoil plate in the form of two finger clamps, I tightened up the radial clamping set screws, and then the bolts holding the welded assembly onto the spoil plate. (Doing it in this order tends to pull the billet even more firmly downwards). Manoeuvring the billet onto the dowels proved tricky with little to hold onto, but the handled magnets that I use to pick bits off the CNC Plasma Table proved very useful. Then, checking everything that I could think to check I loaded up the TNC355 with the CNC code for the A2-5 side of the adaptor and pressed START. That was at 10:00 this morning - it's now coming up to 12:30 and there's an awful lot still to mill! Mind you I am running with a 50% over ride on the milling feeds after yesterdays jam. . . . more when it finishes. |
| awemawson:
Well time ticks by and it's still chewing away - 3-1/2 hours so far, but the shape is beginning to show: |
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