PS, no point in aligning the tailstock until you have the spindle and bed aligned first. Does your lathe have ajustment on the headtsock alignment?īut my money would be on your wooden board flexing. Twisting the bed to make up for an out of line headstock is not a good thing to do. It may also be the headstock is out of alignment with the bed. Have you checked your headstock bearings for tightness? They should have half a thou or so measureable movement at the spindle behind the chuck when yanking up and down on a one-foot length of bar held in the chuck. Measuring with dial indicators etc is a good starting point but does not take into account real world, real time cutting forces and wear on older machines. Have you tried doing an actual turning test? If you can get a one inch bar sticking out of the chuck six inches to turn to within a thou on an old lathe, you are doing quite well enough. Wood is not very rigid compared with cast iron. Or it might be the wooden board you have it mounted on is warping and bending up instead of the lathe pulling down. Don't stand too close the thing might go off like a mousetrap any second. That's a heck of a lot of packing under one foot there.
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