Curve Question

[[Ia...]]

Hi,
I'm doing a trace of a gear profile using Curve. Is there a way to only trace numbers 29 to 35, and 38 to 44 (see image below)and elimanate the rest?
I would be hoping to do this for all of the 88 teeth.

[[Br...]]

In the measurement strategy you can specify the range of points it will scan.

[[Ga...]]

Hi Ian, there are 2 ways I'd go about this. (Caveat, I'm new to curve so I'm not 100% on this but you can give it a try...)

First Method: In the menu for your Curve feature, click on the arrow button to get a list of all the nominal points. You can select all of the points you want to cut, then delete those points. (Careful though, if you delete chunks at a time it will renumber the points as you delete them, so just make sure to recheck as you go to make sure you're deleting the numbers you want.) [img]https://i.imgur.com/JF8DOgi.png[/img]
[img]https://i.imgur.com/TbHxfDi.png[/img]

Second method: In the menu for your Curve feature, go to the Nominal Data dropdown and select Nominal Geometry Manipulations -> Modify Nominals. In this window go to the Number tab, select "Number of Points", and click the icon to the right. From this menu, you can specify which sections of points you want, and you can specify how many nominal points within those ranges you want. Gives you a little more flexibility if that's helpful to you.
[img]https://i.imgur.com/Jrcfpbe.png[/img]
[img]https://i.imgur.com/glcz2Nc.png[/img]

[[Ow...]]

In the curve feature, you can also select evaluation and then under limit evaluation select Nom.vector Direction. After selecting to limit evaluation, select the Parameters tab and choose which points you don't want evaluated or shown on the plot.

[[Ia...]]

Ok thanks guy's and gal.
I'll give your suggestions a try and figure out which is the best solution for me.

Cheers.

[[Ia...]]

Ok, I have given some of your suggestions a try. The method using the nominal points and deleting the ones I don't is very time consuming, and results in a crash if you don't select the points properly.
The other method I tried is the Nom. Vector Direction --Parameters tab method. This seems to be ok.
I was wondering if there was a way to program a marco that I could apply to this method so I don't have the painful task of going through all 5000 points individually and de-selecting the points that I don't want evaluated.

[[Ch...]]

Here is a good video from Tom Oaks that is on topic.

https://www.youtube.com/watch?v=wDnvcBvC970&t=241s

[[Ch...]]

Are you using a pattern for all 88 teeth?

[[SH...]]

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there is any option in curve tracing to measure the diameter of a particular segment I am interested???

[[Ch...]]

Shabu,

This is what I do sometime. Create a circle, then recall the points of your curve into the circle using 'recall feature points'.

[[Br...]]

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You can create curve segments in the "creating features" window where you take slices of the CAD. Maybe this is what you're looking for?

[[SH...]]

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This video talk about only creating curve,l am little bit confused about curve evaluation.l create a curve and run it but form error shows 2.4mm. l think l have some issue with evaluation. Any video available related to curve evaluation???

[[Ow...]]

No video that I'm aware of but, it sounds like it's a outlier issue, the filter isn't removing it.
If you're using a filter and when scanning, having the filters turned on in the "feature" evaluation is important.
In evaluation, click the filter and outlier box and in the parameters tab, set the range of date reduction to 'include adjacent points", try 3 or 5 and see if your form gets better.
There's a lot of other things that the video may explain on strategy, pre/post scanning, and 3 times more points evaluated but, if you've got that, the above mentioned should help.