Angle Calculation Forumla Problem?

[Toaster]

Hey everyone, I'm trying to write some scripts that can hit two points on the table and calculate the angle between those two points. I have most of the script worked out, but I'm having trouble with the "arc tangent" function.

I boiled down my script to a test of the "ATAN" function as you can see here:

#106=5
#108= atan 12 / 2
m225 #106 "atan is %f" #108
;Expected answer is: 1.4056

#108= atan 12 / 1
m225 #106 "atan is %f" #108
;Expected answer is: 1.4877

#108= atan 12 / .5
m225 #106 "atan is %f" #108
;Expected answer is: 1.5292

After each calculation is the answer I'd expect from doing each ATAN. The answers I actually get are off. It only seems to work the second example... Has anyone here had any experience with this?

[swissi]

Hey everyone, I'm trying to write some scripts that can hit two points on the table and calculate the angle between those two points. I have most of the script worked out, but I'm having trouble with the "arc tangent" function.

I boiled down my script to a test of the "ATAN" function as you can see here:

#106=5
#108= atan 12 / 2
m225 #106 "atan is %f" #108
;Expected answer is: 1.4056

#108= atan 12 / 1
m225 #106 "atan is %f" #108
;Expected answer is: 1.4877

#108= atan 12 / .5
m225 #106 "atan is %f" #108
;Expected answer is: 1.5292

After each calculation is the answer I'd expect from doing each ATAN. The answers I actually get are off. It only seems to work the second example... Has anyone here had any experience with this?

Check your expectations

First you need to put the numbers in brackets:

Code: Select all

#108= atan[12 / 2]
#108= atan[12 / 1]
#108= atan[12 / .5]

I don't know how you came up with the expected results but they are totally off. The ATAN(12/2) = 80.54 according to my calculator and that's exactly the result that CNC12 shows.

-swissi

[Toaster]

Yep, I had the wrong numbers in there, that was from my spreadsheet before I converted them. The brackets definitely did the trick! I was getting some wacky numbers without them. Thanks Swissi!