OS: Windows 10
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.17.13541 (Git)
Build type: Release
Branch: releases/FreeCAD-0-17
Hash: 9948ee4f1570df9216862a79705afb367b2c6ffb
Python version: 2.7.14
Qt version: 4.8.7
Coin version: 4.0.0a
OCC version: 7.2.0
Locale: English/UnitedStates (en_US)
i want to pad the first solid from a sketch up to a datum plane. the tool complains about 0 height even though the datum plane and sketch plane are not equal.
i didn't see anything that seems to relate to my situation on the wiki, except a comment about supports, but the "support" concept is not explicitly defined (or linked to a definition)
so if my 0 height issue is related to supports, how can i get my datum plane 'into the support'?
PartDesign: pad up to face
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- Veteran
- Posts: 5513
- Joined: Thu Apr 05, 2018 1:53 am
Re: PartDesign: pad up to face
I believe there was a fix not too long ago for the 0 height issue when padding up to a face, but I don't know if it was applied to 0.17. You could try your model with one of the 0.18 builds.
Re: PartDesign: pad up to face
here is an interesting experiment:
-datum plane on body's XY, no offset
-sketch on datum plane
-datum plane on sketch, add offset
-pad sketch to second datum plane
produces an object, but padded in opposite direction, at a random length
now that i think about it, it seems the wiki says you cannot pad up to a face unless it is already part of your object:
"If there is no support, no selections will be accepted."
why not? i want to start my body by padding between two predefined planes. Because i specifically want to to be able to track those faces, and sketch on them as datum planes, not as body faces to avoid topological messes.
is this intentionally forbidden? and if it must be forbidden, why can't the datum planes be considered part of the support?
-datum plane on body's XY, no offset
-sketch on datum plane
-datum plane on sketch, add offset
-pad sketch to second datum plane
produces an object, but padded in opposite direction, at a random length
now that i think about it, it seems the wiki says you cannot pad up to a face unless it is already part of your object:
"If there is no support, no selections will be accepted."
why not? i want to start my body by padding between two predefined planes. Because i specifically want to to be able to track those faces, and sketch on them as datum planes, not as body faces to avoid topological messes.
is this intentionally forbidden? and if it must be forbidden, why can't the datum planes be considered part of the support?
- Attachments
-
- first_pad_to_datum.FCStd
- (15.92 KiB) Downloaded 37 times
-
- Veteran
- Posts: 5513
- Joined: Thu Apr 05, 2018 1:53 am
Re: PartDesign: pad up to face
DatumPlane001 is attached to Sketch. Maybe that's the problem? In the attached model I have attached both datum planes to the xy plane and it seems to work as expected.
- Attachments
-
- first_pad_to_datum(2).FCStd
- (7.93 KiB) Downloaded 37 times
Re: PartDesign: pad up to face
I'm pretty sure it's not, only an oversight. Another arbitrary limitation is that the datum plane needs to be parallel to the sketch plane. This was discussed some time ago with wmayer.
The PartDesign Pad wiki page needs to be updated, padding the first base feature up to a datum plane was only added in v0.18, with the limitation I mention above, and which I hope can be lifted before the 0.18 release.
Re: PartDesign: pad up to face
thanks TheMarkster. is your model in 0.18? (fyi, i tried attaching the second datum plane in various ways and it didn't help me)TheMarkster wrote: ↑Sun Oct 28, 2018 11:21 pm DatumPlane001 is attached to Sketch. Maybe that's the problem? In the attached model I have attached both datum planes to the xy plane and it seems to work as expected.
Thanks NormandC
Re: PartDesign: pad up to face
The bug is fixed with git commit fe2660b46 and was part of issue #0003177
Re: PartDesign: pad up to face
The parallel to sketch plane limitation was not, we discussed it in another topic... I'll try to find it.
Re: PartDesign: pad up to face
You wrote about it in the tracker of issue #3177
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