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This spreadsheet has been protected to prevent accidental corruption of formulae. If you need to change any of the protected cells, I recommend that you first make a copy of the calculator and store the copy in a safe place. Click on TOOLS - UNPROTECT SHEET. When prompted for a password type in the word "OPEN" using capital letters. I strongly recommend that you reinstate the protection once you have completed your eding. Click on TOOLS - PROTECT SHEET and re-enter the password.
ROTARY TABLE CALCULATOR
========================
Use the rotary table calculator at left to determine the incremental angle of table rotation when a circle is to be divided into any number of equally sized segments.
Geometrically speaking, the calculator gives the number of degrees included in each segment expressed as decimal degrees, degrees, minutes & seconds and radians.
Example: Divide a circle into 26 equal segments.
Answer: Each segment is:
13.646 decimal degrees
13 degrees, 50 minutes, 46.154 seconds
0.12083 radians
A rotary table can be employed as a dividing head provided you carry out the angular mathematics (using the calculator). This works best when the segments are whole degree fractions of the circle (see table below). However, when segments involve fractions of a degree it becomes easy to introduce errors when rotating the table to each successive position. In such cases it is preferable to use a dividing head.
Table 1: Circle segments that have whole numbers of degrees.
------------------------------------------------------------------------------------------
Segments: 1 2 3 4 5 6 8 9 10 12 15 18 20 24 30 36 45 60 72 90 120 180.
Degrees: 360 180 120 90 72 60 45 40 36 30 24 20 18 15 12 10 8 6 5 4 3 2
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