5 Replies Latest reply on Aug 9, 2010 7:36 AM by CADsupport Ka-group

# How to measure the length of a dynamic cable (part)

We have created a PART (cable) that is linked to an assembly. As the assembly changes, the part changes too.That works fine.

We want to get the LENGTH of the cable. There doesn't seem to be a clear way to do this. Anyone have any ideas?

• ###### Re: How to measure the length of a dynamic cable (part)

An approximation would be to have a 3D sketch, and sketch lines/arcs along the center of the cable, then convert to a spline using the fit spline tool.  The length of the resulting spline would then be your approximate cable length.  Seems like a rough way to do it, hopefully someone has a better way.  Routing?

• ###### Re: How to measure the length of a dynamic cable (part)

if the crossection is constant then the volume/ft is consant, compute the volume then divide by the vol/ft constant to attain the length.

you could do the same thing using mass/ft as well.

• ###### Re: How to measure the length of a dynamic cable (part)

Yes, that did it!

How to for others:

Our part is a 10mm diameter cable. We need to find it's length.

We created a temporary part of a 10mm diameter cable and extruded  it 1mm (length).

We then obtain its VOLUME from the MASS  PROPERTIES.

In this case we have: Volume = 78.54 cubic millimeters

Open the part to measure and obtain its VOLUME from the MASS PROPERTIES.

In our case we have: Volume = 375897.80 cubic millimeters

We do the math: 375897.80 / 78.54 = 4786.07mm or 4.786m

• ###### Re: How to measure the length of a dynamic cable (part)

looking at your model you have a number of sweeps. you could do this all perhaps in 1 single 3d sketch profile then use select chain to get the entire sweep profile sketch and then use measure. a few more steps but should work

• ###### Re: How to measure the length of a dynamic cable (part)

Simply add lengt dimensions to all  relevant sketch entities. Use arc length for radii, click on Smart Dim, select first arc endpoint, then the second one, and then the arc itself at last. Make an equation to calculate the sum. The calculated sum can for example be linked up in a text note on a drawing.