disapearing polar array

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MIKE_BRANDT
Posts: 23
Joined: Thu Jun 24, 2021 4:22 am

disapearing polar array

Post by MIKE_BRANDT »

making a model of a gator aid bottle neck from original specification
all work was done in part design inside latest real thunder release
i developed the thread with a helical extrude in parts design.
added lead in and lead outs with revolution about datum lines
used polar array to make two threads
subtracted excess lead in and out with a removal extrude
generated the rest of the neck with a revolve

when i add the last revolve the thread in the position of the base thread acts as a subtractive feature.

I've tried many combinations of order of construction, making individual components and bullion them together
they all have a feature that one of the parts turns into a subtractive element
or
the bullion object degenerates into crossing planes that do not make a solid at the interface between objects

what am i doing wrong????????????


OS: Windows 10 Version 2009
Word size of FreeCAD: 64-bit
Version: 2022.1112.26244 +5306 (Git)
Build type: Release
Branch: LinkDaily
Hash: c64e4a49244a1c0ce9fd6455d18aa919d0db9c80
Python version: 3.8.10
Qt version: 5.15.2
Coin version: 4.0.1
OCC version: 7.6.2
Locale: English/United States (en_US)
Attachments
20b.FCStd
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MIKE_BRANDT
Posts: 23
Joined: Thu Jun 24, 2021 4:22 am

Re: disapearing polar array

Post by MIKE_BRANDT »

forgot to put in a screen shot
Screenshot 2022-11-25 075247.png
Screenshot 2022-11-25 075247.png (110.24 KiB) Viewed 5836 times
imm
Posts: 250
Joined: Wed Nov 03, 2021 1:00 pm

Re: disapearing polar array

Post by imm »

Change your order of operations.

You have to be careful to build on a base shape rather than on a feature.
See attached.
20b-rearranged.FCStd
(402.77 KiB) Downloaded 64 times
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