Bug in Equation Editor

[randy1976]

Will not accept the follow equation when making a sketch (defining a rectangle):

( CameraArmThickness ) * (3 + Tolerance)

Note that I have defined those two variable names and picked them from F360's selection list. However, the equation is colored red (indicating an error) and when I hit enter, it changes the equation to

CameraArmThickness

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That is the sum of the problem, but for background, it

* will accept 3 + tolerance as a value
* will also accept ( ( 3 mm + Tolerance ) ) * 3
Note that F360 injected the "mm" into the equation I entered, not me
* will accept CameraArmThickness
* won't accept ( ( 3 + Tolerance ) ) * ( CameraArmThickness )

[HughesTooling]

You need to cancel the units, you are multiplying 2 millimeter parameters so the answer is in square mm . So something like  ( ( 3 + Tolerance ) ) * ( CameraArmThickness)/mm

[HughesTooling · Accepted solution]

To make this sort of calculation work in all situations you should probably cancel the units for each parameter like this. 

[g-andresen]

Hi,

please share the file for reply

File > export > save as f3d on local drive > attach to post

günther

[g-andresen]

Hi,

What is this all about?
If the thickness of the arm is to be multiplied by 3 and then the tolerance is to be added, the expression must look like this:

günther

[randy1976]

Thanks HughsTooling, that worked.

I should say that the decision by Autodesk to implement it this way is completely explicable and very frustrating. To put it mildly.

[g-andresen]

Hi,

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@randy1976 wrote:

I should say that the decision by Autodesk to implement it this way is completely explicable and very frustrating. To put it mildly.

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In my opinion, the user is responsible for controlling the units in equations.

Günther