Press Pull issue

[welbot]

I'm not sure if this is a bug, or something weird with this file/my settings, but I can't work it out, so figured I'd check here. Hopefully it's something someone's come across before, and can explain how to fix it.

I have a cylinder:

The bounding box dimensions are what I'm looking at here. (I believe the height is bigger than the length due to it not being exactly horizontal, but that's not my concern anyway)
I then select the end face of the cylinder, and use press pull to move it 0.1mm 

Looks a bit too much... well, that's because it is...

Suddenly my cylinder jumps from 1.5mm, to 2.25mm... 
Is there some setting or previous action within the document that could be causing this? Pretty much the only things that I've done so far, was scale the entire model down, and then used offset face to make the diameter of the cylinders bigger (which worked precisely to the measurement I had specified.) 

There are 111 of these cylinders in the scene, and it's happening to all of them. 

[g-andresen]

Hi,

Please share the file.

File > export > save as f3d on local device  > attach it to the next post.

günther

[welbot]

Unfortunately, I can't really publicly share at this point. At least not without removing a good portion of the contents, and I don't know a way to do that where by simply rolling back the timeline would allow the removed content to just re-appear. Deleting it causes the bit I'm having trouble with to also disappear too, so I'm not sure how to tackle that 😕
I was really hoping someone might have come across a similar situation before, or had some suggestions for things to check.

[welbot]

Had to leave it for a bit, but I came back and I just used offset face to extend the length, and it extended by the correct amount. This will allow me to continue on with things, but I really can't mark it as a solution, because the issue of press pull doing unexpected things still exists. If someone from Autodesk would like to check it and see if it's a bug or something, I'd be happy to privately share the file. 
Apart from that, if anyone else has had a similar issue, I'd love to know, especially if you managed to fix it 🙂

[jeff_strater]

Unfortunately, that is hard for us to do without the ability to reproduce the issue you are seeing.  Understand if you can't share the entire design, but if you can even extract just one of these cylinders that show the issue, then we'd be happy to take a look at it.

One thing to check:  Do you have "incremental move" set in your grid settings?

that does affect Press/Pull to snap to whatever increments you've set it to snap to.  Hard to say if that is the issue without more info.

One more thing - the values shown in measure are aligned to the world coordinate system, so if your cylinder is, indeed, rotated, that might affect the outcome.  Instead of relying on that bounding box data, measure from the end faces of the cylinder - what does that show?

[welbot]

Hi Jeff,

I don't have the grid snapping on, but I wasn't dragging it either. This happens when I type the value in to the box. 

I figured that the bounding box is aligned to the world co-ordinates when I noticed the height was 0.01mm different to the length (given the end was circular,) and it makes sense, as that particular cylinder is only the slightest bit off being horizontal. The measurements still show 2.25mm (same as the bounding box) even if I project the body in to a sketch and use the dimension tool to check the length (or width as designated by the bounding box reading.) 

As I noted in my previous reply, using offset face to perform the same operation, and typing in the value, extends it by exactly the amount typed, but for some reason press pull seems to move it way too far. (Typing in 2mm for instance, made it something like 10mm instead.)

Regarding your suggestion of extracting the cylinder, how would you recommend going about this? I assumed trying to export it somehow might also strip out other things that might be a part of the issue?
Certainly willing to give it a go if you think it's worth a try, but if it is likely to strip out potential causes, I'd be happy to give you access to the whole file by private message or something if that's the only way to help figure out what the issue is. 🙂

[jeff_strater]

Perhaps a first step is to record a screencast or video.  It is hard to guess what might be happening from just a verbal description.  Press/Pull is an odd command (I stay away from it, myself), because it operates in multiple modes.  The default is "automatic".  In that mode, the command can do several different things:  If the cylinder in question is based on an extrude of a sketch with a circle, then Press/Pull will actually edit the Extrude, and change the distance, so the distance shown is the total extrude distance.  However, if the cylinder is made with a cylinder primitive, it puts you into Offset Faces, and the measurement is a relative measurement from where it started.  Also, behavior may be different in Direct Modeling or Parametric Modeling.

As far as cutting down the model, I would start by just deleting as much as possible in a copy of the design, until you have as little as possible to just reproduce this behavior.

[welbot]

hmm I hadn't thought much about the whole primitive vs created from sketch. I've been working on it for a while now, and it's been through a numerous iterations, and on several different pc's. At some earlier stage, I had a chance to mess around with solid works for a bit, and I'm not 100% certain, but one or more of the cylinders may have been imported from the stuff I did there, and I may have used it/them to continue working with during a hazy brained late night stint.  If so, it could well be treating them differently to what I'm used to.
Having been through all these iterations, I cleared out a lot of the history at a few points just to "tidy things up", so many of the things that I originally sketched in Fusion no longer have that original sketch data attached, so figuring out what is 100% Fusion and what isn't would be a task and a half. 

Perhaps I'll just leave it at that as the most likely cause. At least the offset face command succeeded. Perhaps I should get in to the habit of using that more instead of press pull in future. It's just always worked for me in the past, so never really thought twice about it until now 🙂