Cannot edit circular pattern in a sketch

[Anonymous]

After one of the latest updates, i cannot edit a circular pattern in a circle in a sketch anymore.

Is this the expected behavior.

I have been able to edit the pattern in this exact sketch before.

[seth.madore]

Could you share the file or a screencast demonstrating this behavior?

[g-andresen]

Hi,

works as expected, but perhaps the menu does not show all options.

günther

[Anonymous]

https://knowledge.autodesk.com/community/screencast/6073f1ef-9686-4319-a2c6-e05a9a2e8b58

[Anonymous]

If I make another circle and a pattern inside, I can edit that new pattern perfectly. Its the existing pattern from a loaded file I cannot edit.

[davebYYPCU]

Well not like that you can't.

Edit sketch.

Left click select the pattern Icon - highlights darker blue

right click and select Edit Pattern from the menu.

Might help....

[Anonymous]

None of that works, the parttern marker never goes dark.
Try this file. https://a360.co/2VZJVRU

[davebYYPCU]

No problem.

Might help.....

[g-andresen]

Hi,

I suspect that the command here is (uniquely) corrupt.
I can only strongly recommend that you create patterns not in the sketch but as a feature.
This way you always get the new current state when the quantities change and you don't have to execute the extrusion command manually after changing the sketch.

günther

[TheCADWhisperer]

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@Anonymous wrote:
Its the existing pattern from a loaded file I cannot edit.

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You are not using the most computationally efficient technique.

It is all wrong to pattern sketch elements like this.

As suggested by @g-andresen - pattern feature rather than sketch.

It would also be helpful if you Attach files here rather than link.  (Faster on our end.)

Can you File>Export your *.f3d file to your local drive and then Attach it here to a Reply?

[Anonymous]

OK, I have found the problem. When you want to edit a circular pattern in a sketch, apparantly you need to mark the center of the pattern before you can hover the parttern icon to darken it.

But in the file I have, the circle has N points on top of each other, which makes it really hard to find the point enabling the pattern.

[TheCADWhisperer]

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@Anonymous wrote:

... circular pattern in a sketch,

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Not the correct technique for this design.

[Anonymous]

I redesigned with a different technique, using pattern outside the sketch. Now the recalculation is much faster and much more stable. But now I face the problem of having many bodies making it annoying to work with for export or 3D printing.

Having many bodies is also annoying in this case: I need a belt of 90 teeth and a belt of 200 teeth. First i make a belt of 90 teeth, combine all bodies and 3D print it. Then I change the number of teeth parameter to 200, but the combine does not add in the extra bodies so now I have a 90 tooth piece and then another 110 loose teeth 🙂

What is the best technique, if I need a single body as result after changing the number of teeth parameter.

If just the circular pattern dialog (outside sketch) could have the option of combining bodies that touch each other.

[TheCADWhisperer]

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@Anonymous wrote:

But now I face the problem of having many bodies making it annoying to work with for export or 3D printing.

What is the best technique, if I need a single body as result after changing the number of teeth parameter.

Attach the new version here.

Can you File>Export your *.f3d file to your local drive and then Attach it here to a Reply?

It is all in the order of operations and the Options you select when creating the pattern whether you get one body or multiple bodies.

[g-andresen]

Hi,

extrude one tooth on the belt with the JOIN option.
Then create a pattern (Type FEATURE) and select the last extrusion feature (tooth) from your timeline.

This way there is only 1 body.

günther

[davebYYPCU]

Change the timeline order of operations.

Make one tooth, pattern them.

Edits for count done here, before next step 

create - Extrude / Sweep the “Band” with Join, will merge all teeth to one body.

Might help.....

[Anonymous]

Hi,

I've been busy with other suff, but here the new one is attached.

[Anonymous]

Tried to make a pattern using feature on the first body created with join, but no good, still gets N individual bodies.

[g-andresen]

Hi,

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@Anonymous wrote:

Tried to make a pattern using feature on the first body created with join, but no good, still gets N individual bodies.

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This is because you did not follow my recommendation and first  extrude a base (without teeth) of the belt.

Watch the screencast and follow the timeline.

günther

[Anonymous]

I dont get what you write with "Extrude / Sweep the band with join". Tried to sweep with any possible combination of parameters, but didn't succeed.