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For the plugs to turn the outside - if they have a slight taper, you can use the tailstock to put some pressure on, and basically you are turning between centers. Or drill/tap the holes for the end caps, and use a bolt in the head end for a driving point. Just take light cuts so you are not putting a lot of pressure on it. Assume you are turning the outside down since the cylinder stock was oversized to what the plan calls for? If so, on next engine turn that down first on longer stock, one end in chuck, other on live center, then cut the cylinder blanks from that piece.
If so, on next engine turn that down first on longer stock, one end in chuck, other on live center, then cut the cylinder blanks from that piece.
Lost me on that, if the stock is already a little smaller than the plan calls for, why do you need to turn it down more? The bore is centered, the flats come in from the side. What is thete to turn?
Quote from: crueby on January 29, 2016, 02:18:01 AM If so, on next engine turn that down first on longer stock, one end in chuck, other on live center, then cut the cylinder blanks from that piece.Perhaps Zee could convert this excellent advice into a mantra for entry into his shop notebook. Something like...NEVER REMOVE A PART FROM ITS PARENT STOCK UNTIL ABSOLUTELY NECESSARY.Hmm, where have I heard that before?
Zee - back on the A2Z toolpost moving issue - a friend of mine had a simaler problem on his, saw what I had done, and did a variant on it - just did a single arc rather than the 4 that I did, is working very well for him. Below is a picture of his.
Quote from: crueby on January 29, 2016, 03:01:16 PMLost me on that, if the stock is already a little smaller than the plan calls for, why do you need to turn it down more? The bore is centered, the flats come in from the side. What is thete to turn?The outside of the cylinder is unfinished. I just want to turn it a tad to clean it up. Whether I did it first or not...the result is the same.Right or wrong...I thought doing it this way (using the bore to center) would improve my chance of keeping the outside parallel to the inside.
Quote from: crueby on January 29, 2016, 10:12:23 PMZee - back on the A2Z toolpost moving issue - a friend of mine had a simaler problem on his, saw what I had done, and did a variant on it - just did a single arc rather than the 4 that I did, is working very well for him. Below is a picture of his.I think I'm missing something. Wouldn't the toolpost rotate on that plate?
That should be ignored by an optimizing compiler.
Quote from: PStechPaul on January 29, 2016, 11:04:10 PMThat should be ignored by an optimizing compiler. It was. Otherwise I would have caught it when I wrote it.