Sine Bar Chart?


Anyone got a simple chart or spreadsheet for a 5" sine bar?
Reply to
RBnDFW
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Isn't it just angle = arcsin(offset/5")?
Reply to
Tim Wescott
No, it's offset=sin(angle)x5
:-)
Zeus books have sines in, as do school tables books (if anyone still prints them). Otherwise, pocket calculators or decent slide rules work...
Mark Rand RTFM
Reply to
Mark Rand
I did get that backwards, didn't I?
Reply to
Tim Wescott
========== Not to put too fine a point on it, but with the proliferation of cheap scientific calculators with the sine function, charts/tables are obsolete. Also you can use the calculator for speed/feed/DoC calculations. for some examples see
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Unka George (George McDuffee) .............................. The past is a foreign country; they do things differently there. L. P. Hartley (1895-1972), British author. The Go-Between, Prologue (1953).
Reply to
F. George McDuffee
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Reply to
Jim Wilkins
Jim, that is perfect.
thanks much!
Reply to
RBnDFW
Hey, I'm the guy that flunked HS trig :) Or more correctly, I bailed before I failed.
Reply to
RBnDFW
I flunked college technical writing, that was a practice exercise.
jsw
Reply to
Jim Wilkins
Tim, it is a sine bar. Not an arcsin bar. :)
I love Easy Calc that I run on my palm pda.
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sin(30)*5 returns the expected 2.5 as long as I tell it to use degrees and not radians or gradians.
Wes
Reply to
Wes
That is working backwards to ge the angle from the stack size.
If you want to calculate the (gauge block) stack size needed to get a specific angle, try:
block_stack_needed = sin(angle) * 5
that is why they are called "sine bars".
If you have a scientific calculator (like my old HP 15C), you have a sine function in there. Otherwise, pick up an old _Handbook of Chemistry and Physics_ (or any of a number of other reference books) and look for a table of sines which has sufficient digits to give you the accuracy you need. Hmm ... old editions of _Machinery's Handbook_ also have the sine tables. Newer ones have dropped that because of the availability of scientific calculators. (Avoid BASIC in a PC, because it probably does not have enough significant figures to do what you need -- and it also probably is expecting the angles in radians, not degrees. I'm not sure what precision a spreadsheet can give, but unless you can at least ask for "double precision" calculations, forget it.
Enjoy, DoN.
Reply to
DoN. Nichols
In OpenOfficeCalc 3.0, SIN(30) =3D 0.50000000000000000000
jsw
Reply to
Jim Wilkins
OK, found a iPhone free app calculator with trig functions. that ought to be the ticket.
thanks
Reply to
RBnDFW

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