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+--- Thread: Calculating rings (/thread-24084.html)
Calculating rings - Willy Tschager - 2020-06-10
My usual approach placing rings is trail'n'error. I wonder if there is a mathematical way or even a tool which does it for me? I have these cylo:
1 1 50 -37 -10 43.75 0 0 0 0 -43.75 0 10 0 48\2-4cylo.dat
1 1 50 -37 -10 40 0 0 0 0 -40 0 3.125 0 48\2-4cylo.dat
1 1 50 -37 -3.125 40 0 0 0 0 -40 0 3.125 0 48\2-4cylo.dat
and need the external ring.
1 1 50 -37 -3.125 4 0 0 0 0 -4 0 3.125 0 48\1-4rin10.dat
is too large cos the distance is not 4 but 3.75. So ...
w.
RE: Calculating rings - Gerald Lasser - 2020-06-10
There is the "Rings and Cones" which can be found in the "Tools" Menu of LDPE, that gives the following result:
1 16 0 0 0 1.16666666 0 0 0 -1 0 0 0 1.16666666 4-4rin66.dat
1 16 0 0 0 1.28142076 0 0 0 -1 0 0 0 1.28142076 4-4rin61.dat
1 16 0 0 0 1.30242766 0 0 0 -1 0 0 0 1.30242766 4-4rin61.dat
On the other hand, what if you extend the outer cylinder by 0.25 LDU (0,1mm) ? it wouldn't fit?
RE: Calculating rings - Philippe Hurbain - 2020-06-10
(2020-06-10, 8:30)Gerald Lasser Wrote: There is the "Rings and Cones" which can be found in the "Tools" Menu of LDPE, that gives the following result:Yes it's often possible to tweak a bit dimensions to fit simpler ring combos, especially if the overall ring is thin (say above ring 6 or 7)
1 16 0 0 0 1.16666666 0 0 0 -1 0 0 0 1.16666666 4-4rin66.dat
1 16 0 0 0 1.28142076 0 0 0 -1 0 0 0 1.28142076 4-4rin61.dat
1 16 0 0 0 1.30242766 0 0 0 -1 0 0 0 1.30242766 4-4rin61.dat
On the other hand, what if you extend the outer cylinder by 0.25 LDU (0,1mm) ? it wouldn't fit?
RE: Calculating rings - Orion Pobursky - 2020-06-10
There the ring calculator on my LDraw spreadsheet. It'll help you find the ring combination you need.
RE: Calculating rings - Willy Tschager - 2020-06-10
(2020-06-10, 8:30)Gerald Lasser Wrote: There is the "Rings and Cones" which can be found in the "Tools" Menu of LDPE, that gives the following result:
Thx, wasn't aware of.
w.