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| Stilldrillin:
Just a little addendum, to the leadscrew handwheel posting. As I already had the r/table set up, today. Andy's dial gave me the idea. One turn of the handwheel = .059". Divide by 6 = "10 thou". A ring of 6 off, 5mm dimples. Including the locking grubscrew..... And another 6 off, 3mm dimples, spaced between....... The "reading" is taken along the line of light, from the overhead striplight. Quite accurate enough, when "another 20 thou", is needed. :thumbup: Any more accuracy demands the tyre gauge. David D |
| andyf:
That's a nifty solution, David! You'll need to remember to keep your head still while taking off that 10 or 20 thou, so the reflection doesn't move. Or finish up another tin of syrup for the raw materials, so you can add sophistication with a double headed pointer. T shaped with the stem of the T fastened to the lathe bed. Andy |
| Stilldrillin:
Thanks for the "heads up" Andy! :thumbup: I have already accuracy tested that theory. During shakedown trials :smart: 3" of for/ aft head movement, gives 2 thou of parallax error........ Approx........ :) Any pointer will have to wait....... We've just started a new tin! :lol: David D |
| Stilldrillin:
It's becoming very easy to abandon the Maiwald tragedy, and do something more interesting. Like this chuck backstop, for my mini lathe....... Made from what I had in the bits box. 12mm studding. The 3 loctited nuts, just needed a light corner skim, to fit the bore. Wedges, and spacer made from a "knocking stick", for Nikken toolholder. This tightens in the rear of the spindle........ The r/h end is some 7" behind the front of the 5" chuck jaws. Should be able to face up to 12" long components. Or shorter, using a probe screwed into the M6 tapped hole...... David D |
| Stilldrillin:
I use the standard 80mm chuck, most of the time. But need to fit the 5", occasionally. My biggest problem is fumbly fingers, and fiddly little M6 nuts....... So, I made meself a set from 12mm a/f mild steel, 1/2" long........ The chuck stud can now hold the nut, while I swap hands to spin it into engagement........ Another alternative, is to buy a pack of 10 stud connectors for £1.90....... Though for me, the larger a/f nuts are preferable. :thumbup: David D |
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