Offset Glitch

[Anonymous]

I have encountered some sort of glitch while using the offset command in Inventor 2018. The value I entered did not appear on the offset itself. The screencast video captures the problem I'm having. It doesn't happen all the time, and I can't figure out what variable changes comparing when it does or does not happen.

[SBix26]

Have you noticed the problem only on this sketch, or only on this part, or in general?  Can you post the part here for others to try?

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Sam B
Inventor Pro 2019.0.0 | Windows 7 SP1
LinkedIn

[Anonymous]

I've had this happen on a couple separate parts before. I can't specifically remember which ones, and I scrapped this last one, so unfortunately I can't share them. If I can replicate this issue I will share it.

[Anonymous]

@johnsonshiue I was referred to you by a coworker. I was wondering if you had any advice on this matter.

[johnsonshiue]

Hi! I vaguely remember seeing this behavior before. It has something to do with sketch snapping distance (Tools -> Document Settings -> Sketch). The required offset distance may be smaller than the snapping distance. Could you share the example here?

Many thanks!

[Anonymous]

I was able to get the glitch to happen again. I tried an offset of 2" on a circle with my snaps set to 1/16".  Attached is the sketch showing the issue I'm having.

[Anonymous]

I can reproduce the behavior you are seeing with Inventor 2018.3

Cannot reproduce on Inventor 2019.

[Curtis_Waguespack · Accepted solution]

Hi @Anonymous,

Welcome to the forum.

Please see this link for a related topic and solution:

https://forums.autodesk.com/t5/inventor-forum/dimensions-with-offset-wrong-in-2d-sketch/m-p/7609510#...

I hope this helps.
Best of luck to you in all of your Inventor pursuits,
Curtis
http://inventortrenches.blogspot.com

[Anonymous]

By turning off grid snaps I was able to do an offset correctly, but this doesn't seem to address the root cause of the issue.

[Curtis_Waguespack]

@Anonymous wrote:

By turning off grid snaps I was able to do an offset correctly, but this doesn't seem to address the root cause of the issue.

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Hi Neil.Fortney,

johnsonshiue can likely speak to this best, but the conflict of behavior might be a bug ( meaning it's not working as designed) , but I suspect it is working as designed, but is just designed in a way that gives unexpected errant results, which technically isn't a bug, just a behavior that needs to redesigned. This issue was reported a few years back, but I don't know if it is slated to be fixed/changed/updated.

Being aware of the issue and toggling off the snap behavior when using offset is the best we can do at the current time, as far as I know. Most people do not use the snap feature, so they they never encounter this issue.

I hope this helps.
Best of luck to you in all of your Inventor pursuits,
Curtis
http://inventortrenches.blogspot.com