ROBERT SCHUMAN
08-19-2006, 12:58 PM
I was asked to explain a bit more on the hollow twist I made so here is a starter.
1) I turn the Newel I intend on working with, picture one
a)set up pattern
b) load blank
c)for big turnings over 4" I reset pin on back of lathe for a deeper cut and reset cutter accordingly.
d) set diameter for correct turning.
e) turn post.
2) I then setup router head and the indexing head with drive gears.
a) I move my pattern 1 3/16 inches to the right for the cutter head offset.
b) for straight flutes I set the depth of cut and set the index head for the amount of cuts or divisions in this case eight.
c)set the ears on the pattern for the hydrolic pin to land on and ease into the cut.
3) For the twist its the same system but I engage the gear box on the front wich will cut left or right hand threads.
a) set cutter
b) decide on number of starts ( number of starts * cutter width = gear ratio )
c) select gear ratio
d) make cuts
This is a basic version and I left out many steps but it should give a good idea of the system used.
I did not hollow this one ,but if was going to I would replace the router bit with a straight bit and make multiple cuts in depth till I cut through.
Bob
1) I turn the Newel I intend on working with, picture one
a)set up pattern
b) load blank
c)for big turnings over 4" I reset pin on back of lathe for a deeper cut and reset cutter accordingly.
d) set diameter for correct turning.
e) turn post.
2) I then setup router head and the indexing head with drive gears.
a) I move my pattern 1 3/16 inches to the right for the cutter head offset.
b) for straight flutes I set the depth of cut and set the index head for the amount of cuts or divisions in this case eight.
c)set the ears on the pattern for the hydrolic pin to land on and ease into the cut.
3) For the twist its the same system but I engage the gear box on the front wich will cut left or right hand threads.
a) set cutter
b) decide on number of starts ( number of starts * cutter width = gear ratio )
c) select gear ratio
d) make cuts
This is a basic version and I left out many steps but it should give a good idea of the system used.
I did not hollow this one ,but if was going to I would replace the router bit with a straight bit and make multiple cuts in depth till I cut through.
Bob