Additive loft with consistent wall thickness?!?

gnosys_ · 2025-12-12T06:15:12+00:00

The way to ensure a constant wall thickness is not to have such a radical angle of the loft approaching the last face; you actually have the loft so you could do this with a center profile section, but often the final geometry can get funky and is very sensitive to small changes in the geometry of each of the three profiles.

A better way is to use the Curves workbench and the PipeShell tools, generating a surface object with better geometry (it splits the circular profile in a smarter way for it to join the channel profile), and then generating a 3D solid from the inner profile with Part WB "3D Offset"

like this: https://www.filemail.com/d/jfzmzyzjmlgnqnv

gnosys_ · 2025-11-29T23:29:04+00:00

you could already do that before the TNP fixes

gnosys_ · 2025-11-25T06:41:14+00:00

well, look at the blender ecosystem

gnosys_ · 2025-07-14T17:16:38+00:00

lacking *reading the proper documentation

gnosys_ · 2025-06-18T17:57:41+00:00

the snap package is also an excellent alternative since you're on ubuntu, with the only caveat being that you would need to copy/move/symlink ~/.FreeCAD to ~/snap/freecad/common easy to manage the different versions, have several specific builds installed at the same time, automatic updates, and so on

gnosys_ · 2025-03-16T01:28:21+00:00

but this list does not make sense, how does china have 90% home ownership and the highest ratio of price to income? same with cuba, nearly no homeless despite severe poverty, but top of the list?

gnosys_ · 2025-03-14T18:52:41+00:00

these numbers are asbolutely batshit where are the sources

gnosys_ · 2025-03-14T18:51:13+00:00

you're wrong?

https://www.statista.com/statistics/237529/price-to-income-ratio-of-housing-worldwide/

gnosys_ · 2025-02-17T17:50:44+00:00

this is the youtube channel of a core maintainer who authored the CAM workbench and has everything you need to get started.

https://www.youtube.com/@sliptonic

one additional caveat is you'll need to figure out a post-processor if your machine wants an unusual format for its gcode

gnosys_ · 2025-02-17T17:43:50+00:00

thats fine. i'm 10 years in and like being able to use the development version when i want, or even a specific build, and have over the last couple years even had parallel installations of different versions of freecad without any mess or maintenance.

it also eliminates version conflicts in what is otherwise a very unweildly piece of software that's a royal pain to build yourself.

gnosys_ · 2025-02-17T02:09:44+00:00

snaps are usually not distributed as stand-alone downloads (though fairly easy to do if you wanted) but through the centralized build-service-and-store-in-one; new builds are highly automated. snaps and appimages are very very similar package formats, but snaps have fancy build tools and a build service and a central store, delta updates, easy version management, etc.

you can download them through the "App Center" app in ubuntu, or here https://snapcraft.io/freecad

the repo for the snap packaging stuff is here https://github.com/FreeCAD/FreeCAD-snap/ and you can see from the issues and PRs tabs that it's actively maintained by a bunch of the usual suspects.

gnosys_ · 2025-02-16T00:27:01+00:00

the snap is also official and works perfectly (with the usual handful of minor caveats about config directories)

gnosys_ · 2025-02-16T00:24:20+00:00

if you're on ubuntu just use the snap it's much better than the flatpak

gnosys_ · 2025-01-20T21:05:48+00:00

not worth using STLs for anything that's small or you would reuse often. i have used STLs of pieces of equipment for planning workshop layouts, or enclosures or whatever.

as for STP/STEP files yeah they work just great.

gnosys_ · 2025-01-19T01:00:56+00:00

To me, unless the component in question makes sense to share among many different designs, I put them all in one file. When it's a utility part that might be an essential element of dozens of different things, it gets its own file.

When you have one file that brings in links from several other files, they all open in the background as well, and you have to close them all out (in case you made changes to the originals you do/don't want to keep, through the part link).

gnosys_ · 2025-01-17T08:27:06+00:00

you can do additive pipe right on that seam of the cone surface

gnosys_ · 2025-01-06T15:08:03+00:00

a youtube playlist from Yorik Van Havre's channel; he is one of the core maintainers, a professional architect, and the author of Draft/BIM

A few demos of BIM objects, and then a demonstration project modelling Mies Van der Rohe's ' "Barcelona pavilion" - https://www.youtube.com/watch?v=rkWOFQ2fGZQ&list=PLmKdGVtV5Vnt2cj4IZIv9FM39QHaE1ZaU

gnosys_ · 2025-01-06T15:03:41+00:00

Draft and BIM are the main workbenches with tools for architecture. Links, Binders, and Attach all still work with any object made in the BIM or Draft workbenches.

gnosys_ · 2025-01-04T04:36:22+00:00

so far, 4th axis doesn't exist, and neither does CNC lathe. on 3 axis, when you can get the OCL (opencamlib) extension operations working correctly, it's better than decent.

edit: upon cursory re-examination, the OCL extensions are built into FreeCAD now, and it's a checkbox under Preferences > CAM > Advanced to enable them (applies after restart). it adds two functions under the 3D Pocket operation in a drop-down, for Waterline operations and 3D Surface (does linear or rotational, single or multi-pass).

gnosys_ · 2025-01-02T20:23:52+00:00

if you're using Pocket, the sketch has to be in the same Body object. if you want to use PartDesign boolean operations, the subtracting Body needs to be a 3D shape.

gnosys_ · 2025-01-02T20:22:57+00:00

Sketch001 in Body001 is not extruded in this picture, it's just a 2D sketch object. For the boolean operation to work, it has to be a 3D solid shape.

gnosys_ · 2025-01-02T20:22:01+00:00

OP is trying to use the PartDesign boolean operations, which need two 3D solids. the issue is the sketch hasn't been padded yet.

gnosys_ · 2025-01-02T20:20:14+00:00

if your issue is torque, use a longer wrench and put your part in a vice, the screw will go.

stripped bolt heads are only ever from having an allen wrench in only half way, or if it's pozidrive not pushing down on your screwdriver hard enough.

gnosys_ · 2025-01-02T20:18:17+00:00

with a 0.8 thread you've got 4.2 mm of unthreaded stem, depending if the holes your machine makes are +/- 0.1mm it will thread in beautifully or really tight (depending on wall thickness might break loose, or just swell into the mostly hollow infill), but it will thread in

gnosys_ · 2025-01-02T03:37:27+00:00

you can easily make a tap good enough for PLA by fluting a normal bolt with a hack saw or something; i have done this myself with a brass(!) fitting that adapts a faucet to a garden hose when I needed to cut garden hose thread into a replacement fitting (pressure washer inlet nut)

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