Inventor General Discussion

## Inventor General Discussion

Distinguished Contributor
Posts: 157
Registered: ‎03-22-2006
Message 1 of 7 (249 Views)

# Trigonometric Functions... is this possible??

249 Views, 6 Replies
03-15-2013 05:38 AM

Greetings!!!

Creating User Parameters, can we use trigonometric functions? and can we add these to linear (mm) parameters?

Can we add the Values irrespective of Units i.e. Inch/ Deg/ Unitless

Example: d0 (In) = d1 (In) +d3[ul] + (sin(Variable_Angle))

In value = In Value + ul Value + deg Value

*Pro
Posts: 1,968
Registered: ‎09-15-2003
Message 2 of 7 (237 Views)

# Re: Trigonometric Functions... is this possible??

03-15-2013 06:32 AM in reply to: naresh_kalyan

You cannot mix units.  So in your equation, you will need to do something like this:

d0 = d1 + 1 in * (d3 + sin(Variable_Angle))

Note that a sine is a ratio and therefore has no units.

Sam B
Inventor 2012 Certified Professional

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Mentor
Posts: 164
Registered: ‎11-30-2007
Message 3 of 7 (236 Views)

# Re: Trigonometric Functions... is this possible??

03-15-2013 06:34 AM in reply to: naresh_kalyan

Yes, you can use trigonometric functions, you just need to have some caution with units, to sum them like you shows, the units must be the same.

Túlio

IV 2013
*Expert Elite*
Posts: 28,253
Registered: ‎04-20-2006
Message 4 of 7 (219 Views)

# Re: Trigonometric Functions... is this possible??

03-15-2013 07:35 AM in reply to: sbixler

sbixler wrote:

You cannot mix units.

You can mix units as long as the resulting equation makes sense - just like writing it out by hand.

The resultant value must have a single unit (or unitless (ul)) depending on logic.

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Message 5 of 7 (214 Views)

# Re: Trigonometric Functions... is this possible??

03-15-2013 07:48 AM in reply to: naresh_kalyan

I had to do something to figure arc length a few years ago (I think the capability has been added to the software since).  As a follow-up question, am I remembering correctly that I was forced to use Radians rather than degrees?

I could be mis-remembering...

*Pro
Posts: 1,968
Registered: ‎09-15-2003
Message 6 of 7 (210 Views)

# Re: Trigonometric Functions... is this possible??

03-15-2013 07:51 AM in reply to: jdavis417

I don't know about "forced" (can't remember last month, let alone a few years ago!), but using radians makes working with arc lengths a lot simpler.

Sam B
Inventor 2012 Certified Professional

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Inventor Professional 2013 SP1.1 Update 2
Windows 7 Enterprise 64-bit, SP1
HP EliteBook 8770w; 8 GB RAM; Core™ i7-3720QM 2.60 GHz; Quadro K4000M
SpaceExplorer/SpaceNavigator NB, driver 3.16.2
still waiting for a foreshortened radius dimensioning tool in Drawing Manager

*Expert Elite*
Posts: 28,253
Registered: ‎04-20-2006
Message 7 of 7 (207 Views)

# Re: Trigonometric Functions... is this possible??

03-15-2013 07:54 AM in reply to: jdavis417

jdavis417 wrote:

I had to do something to figure arc length a few years ago (I think the capability has been added to the software since).  As a follow-up question, am I remembering correctly that I was forced to use Radians rather than degrees?

I could be mis-remembering...

I have posted arc-length solutions here (prior to 2013) that did not require using radians rather than degrees.

http://forums.autodesk.com/t5/Autodesk-Inventor/Dimension-Arc-Length/m-p/3095050/highlight/true#M408...

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