Hello Again everyone!
I have posted these video's ,Mike posted some years back.
on his methods of indexing, These methods have always worked for me in
the past. and I hope some of you will learn and try his methods as well.
https://www.youtube.com/watch?v=oHgzEKnON-o&t=17s
<https://www.youtube.com/watch?v=oHgzEKnON-o&t=17s> Crank handle indexing.
https://www.youtube.com/watch?v=SjcFpO51upw&t=4s
<https://www.youtube.com/watch?v=SjcFpO51upw&t=4s> Carriage travel
indexing.
As well as some notes for Tim K. on crank handle indexing.
Crank Handle Indexing for the Rotary Table
Alternative Indexing Method for Legacy Ornamental Mills
------------------------------------------------------------------------
Mike Pung posted an idea of using the stock gears as a method of
indexing the rotary table instead of the stock handle. Using the a
drive shaft to control the rotary tables motion the following indexes
can be obtained with the stock gear set. I have come up with what I
believe to be a close to definitive answer on the number of indexes
available. They are as follows.
1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 32, 36, 40,
48, 60, 64, 72, 80, 96, 120, 128, 144, 160, 192, and 240.
------------------------------------------------------------------------
The stock gear set will turn the spindle a specific number of times
per x-axis lead screw turn. For more information, see the Crank Handle
Indexing article.
<http://artscopes.com/legacyornamentalmill/tools/pungs_index_method/pungs_index_method.html>
Standard gear set - Leadscrew handle turns for one spindle
RevolutionGear No. of Cranks
A 8
B 12
C 16
D 18
E 20
F 24
G 30
The rotary table makes one revolution for every 8 cranks or 45º
increments per revolution. By multiplying the number of cranks
required to make one 1 spindle rotation by 8 you can calculate the
number of turns the x axis lead screw crank handle will need to turn
to move the rotary table one revolution. Each crank of the lead screw
handle can be used as an equal division.
Index Chart for Legacy's Standard Gear setGear No. of Cranks /
Divisions Degree Increments
A 64 5.625
B 96 3.75
C 128 2.812
D 144 2.5
E 160 2.25
F 192 1.875
G 240 1.5
These can be broken down by skipping crank revolutions. For example,
using the A gear and making a cut once every 4 cranks you can index
the rotary table every 16 locations. However as you can see by this
example, it would be much faster to index the table using a different
method. Using the numbers above, here are the possible indexes
available for each gear.
Rotary Table Indexes Standard Gear SetGear
Divisions
A
2 , 4 , 8 , 16 , 32 , 64
B
2 , 3 , 4 , 6 , 8 , 12 , 16 , 24 , 32 , 48 , 96
C
2 , 4 , 8 , 16 , 32 , 64 , 128
D
2 , 3 , 4 , 6 , 8 , 9 , 12 , 16 , 18 , 24 , 36 , 48 , 72 , 144
E
2 , 4 , 5 , 8 , 10 , 16 , 20 , 32 , 40 , 80 , 160
F
2 , 3 , 4 , 6 , 8 , 12 , 16 , 24 , 32 , 48 , 64 , 96 , 192
G
2 , 3 , 4 , 5 , 6 , 8 , 10 , 12 , 15 , 16 , 20 , 24 , 30 , 40 , 48 ,
60 , 80 , 120 , 240
------------------------------------------------------------------------
Questions or comments or corrections, please feel free to contact me -
Tim <mailto:[email protected]>
Updated: 6/27/2010
C.A.G.
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