| The Craftmans Shop > New from Old |
| The Sequel - Oh Blimey I bought a CNC Lathe (Beaver TC 20) |
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| mc:
--- Quote from: awemawson on September 07, 2018, 10:04:01 AM ---All this testing is producing masses of swarf --- End quote --- Surely a smaller bit bar, or a bigger nut would reduce the masses... :) |
| awemawson:
I know this sounds silly, but the hydraulic chuck jaws that I have on only close down to about 20 mm so I am using 25 mm (well actually 1") stock for testing. I do have soft jaws to fit but don't want to waste them. The jaws fitted are hard jaws. :palm: |
| awemawson:
After much digging about in the inner workings of the FeatureCAM Post Processor I managed to prove that the program was outputting an 'absolute' depth of thread rather than a 'signed' value as required by the Sinumerik 820T control. But I also realised that actually I could determine if when the threading cycle was entered it was an internal thread (requiring a positive depth), or an external thread (requiring a negative depth) by testing an internal variable called <OP-TYPE> that I discovered. After finding that, it was a simple matter of multiplying the thread depth <THRD-DEPTH> by -1 for external threads, and the problem was solved. Dead easy in retrospect, but it took a while ! |
| cnc-it:
That's why i like Featurecam..editing posts is really easy..the whole cam package is built with machinists in mind :thumbup: |
| awemawson:
--- Quote from: cnc-it on September 08, 2018, 07:16:05 AM ---That's why i like Featurecam..editing posts is really easy..the whole cam package is built with machinists in mind :thumbup: --- End quote --- Yes but sometimes the syntax gets overly complicated ! |
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