Sine Bar Chart?

Isn't it just angle = arcsin(offset/5")?

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

I did get that backwards, didn't I?

========== 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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Jim, that is perfect.

thanks much!

Hey, I'm the guy that flunked HS trig :) Or more correctly, I bailed before I failed.

I flunked college technical writing, that was a practice exercise.

jsw

Tim, it is a sine bar. Not an arcsin bar. :)

I love Easy Calc that I run on my palm pda.

sin(30)*5 returns the expected 2.5 as long as I tell it to use degrees and not radians or gradians.

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.

In OpenOfficeCalc 3.0, SIN(30) =3D 0.50000000000000000000

jsw

OK, found a iPhone free app calculator with trig functions. that ought to be the ticket.

thanks