Investigating why extruding a face curved in 3 dimensions doesn't work.

Can it be made to work?



Check out normal lines: [https://www.youtube.com/watch?v=bdQzcvx1TPU](https://www.youtube.com/watch?v=bdQzcvx1TPU)

Check out the Grab Bag: [https://www.youtube.com/watch?v=COVKF25ttLY](https://www.youtube.com/watch?v=COVKF25ttLY)

The Grab Bag on GitHub: [https://github.com/pyro9/GrabBag](https://github.com/pyro9/GrabBag)

* 00:01Intro
* 00:48Try projecting the shape
* 01:42Force the issue with JoinCurve
* 02:07Looks like some geometry issues
* 02:26Try making a sketch with projected external geometry
* 03:17Better but not perfect
* 03:49The extrude tool needs to make a face and find a normal

FreeCAD: Extrude a curved face

Create a triangle wave on an edge and why not a sine.

* 00:01\`  Intro
* 00:33   SineWall performance was abyssmal
* 01:06   TriangleWall
* 01:57   Get the tool
* 02:22   Demo
* 04:34   Interlocking tiles
* 06:32   Finding a vector normal to an edge
* 08:09   It works on non-planar faces (surfaces)



[https://github.com/pyro9/GrabBag/tree/master](https://github.com/pyro9/GrabBag/tree/master)

[https://www.youtube.com/watch?v=COVKF25ttLY](https://www.youtube.com/watch?v=COVKF25ttLY)



FreeCAD: TriangleWall interlocking shapes and a false start

Sometimes you'll find a feature that behaves badly with attachment, going off in some other direction.

But you really want to attach it since the attachment coordinate system if perfect for placing it where you want.

The new MoveOriginParametric tool to the rescue.

Similar to the old Macro, but fully parametric.



Find the Grab Bag at:

[https://github.com/pyro9/GrabBag](https://github.com/pyro9/GrabBag)

* 00:01   Intro
* 00:25   Complete the curved loft
* 00:37   Coordinate space problem
* 00:53   Transform tool works but isn't ideal
* 01:14   Attachment goew awry
* 01:26   MoveOriginParametric
* 02:01   Demo of new tool
* 03:02   Flipping the normal
* 03:38   Ignore Placement



FreeCAD: Putting things in their place

Most people getting in to FreeCAD use the PartDesign workbench.

But some people, myself included, prefer to do most things in the Part workbench.

Here's why.



* 00:01   Intro
* 00:18   Contrast
* 00:57   A Barber Pole in the Part Workbench
* 01:19   Create Helix
* 02:26   Cut helix into Pole
* 02:41   Trim the sweep
* 02:54   Set colors
* 03:06   Now in PartDesign
* 03:18   New body for Helix
* 04:25   Clone the Cylinder Body
* 04:37   Boolean cut the clone
* 04:53   Clone the Helix
* 05:07   Boolean Common w/ Cylinder body
* 05:18   Discussion and Set colors
* 06:15   Add end caps in Part just to be complete.
* 07:27   Mirror the cap





FreeCAD: Part vs. Part Design head to head.

A simple way to make a parametric miter cut on a part guided by attachments.



* 00:01   Intro
* 00:27   FreeCAD 1.1.0 is released!
* 00:43   Demo setup
* 00:50   Create sketch
* 01:02   Edit the attachment
* 01:48   Extrude and cut
* 02:00   Now in PartDesign
* 02:19   Pocket the sketch
* 02:38   About the attachment
* 04:02   It's parametric!





FreeCAD: Attachment gets to the heart of the miter

A FreeCAD workflow to reproduce a Candy Cane done on Maker's Muse in Fusion.

Angus' video: [https://www.youtube.com/watch?v=9NtoOdXWzEk&t=654s](https://www.youtube.com/watch?v=9NtoOdXWzEk&t=654s)

* 00:01Intro
* 01:07An idea for a workflow
* 01:22Pre-requisites
* 01:33Make the cane
* 03:10A path for the cutting tool
* 04:002 Helicies for the ribbon cutter
* 04:49Create a ruled surface
* 05:13Cut the cane
* 05:31Set colors
* 05:47Increase radius and fix the cutter to match
* 06:35Widen the stripes
* 06:45Lengthen the cane
* 07:00Fix the cutter path.
* 07:37Flatten the bottom for printability.
* 08:24Conclusions



FreeCAD:CandyCane, a FreeCAD workflow.

They seem to have disappeared. No drug store here carries them. When I ask, I get a blank stare. Not at Walmart or Target either. I had to order from Amazon. I can't be the only person still using a safety razor, can I?

Styptic pencil

How to engrave text on a curved surface.

If you don't have the Grab Bag installed, see [this video](https://www.youtube.com/watch?v=COVKF25ttLY&list=PLDr1ND2Aqop5phAcfddACuLN_dVYxWaPS&index=1&t=3s&pp=iAQBsAgC).



* 00:01   Intro
* 00:58   Demo set-up
* 01:32   Define the path the easy way
* 01:57   If necessary, do it the hard(er) way.
* 03:12   Create the text
* 03:36   Attachable placement
* 03:48   Create the PathArray
* 04:28   Create the lattice array
* 04:36   Place the text on the array
* 04:52   Make faces from the text
* 05:00   Align the text
* 05:18   Adjust the text size
* 05:56   Extrude the text
* 06:25   Use the extruder from the Grab Bag
* 07:23   Boolean cut
* 07:32   clea

FreeCAD: Writing on a Curve. Keep the text on the path.

It is now possible to select more than one wire in a WireBinder.

How to use it and how it works.

Install the GrabBag: [https://youtu.be/COVKF25ttLY](https://youtu.be/COVKF25ttLY)

* 00:01   Intro
* 00:38   Demo
* 01:58   Get the Grab Bag
* 02:17   Changes to code and caveats
* 02:25   \_\_init\_\_
* 02:45   onDocumentRestored, upgrade old WireBinders
* 03:54   execute
* 05:22   onChanged, beware of recursion



FreeCAD: WireBinder, it's New, Improved!

Completing the model with non-radial features.

* 00:01   Intro
* 00:21   Constrain the lengths
* 01:47   Non-radial features
* 03:24   We need a solid, not a shell
* 04:09   Groove in the connector
* 05:06   Holes for the pins
* 07:49   Conclusion

  


FreeCAD: Xconnect part 3 (final)

Using FreeCAD to analyse a geometry joke.

Also a good excuse to show off less used sketcher constraints.



* 00:01   Intro
* 01:04   Sketch the shape
* 01:23   Constrain right angles
* 02:01   Modes in the Dimension tool.
* 02:47   Name the length constraint
* 03:18   Redundant constraint disappears
* 03:50   Success!



FreeCAD: This is NOT a square! Using FreeCAD to check geometry

Starting with a Photo, create a model using calipoer measures for constraints.



* 00:01   Intro
* 00:35   Begin sketching
* 01:29   Add length constraints from measurements
* 01:50   Make scaffold lines symmetric
* 02:03   fine align the photo
* 02:27   Use the scaffold to create a profile.
* 04:40   Toggle scaffold to construction
* 04:49   Close the profile so it can be revolved.
* 05:08   Revolve
* 05:15   Error, fix it.
* 05:35   Conclude part 2, what's next.



FreeCAD: Modeling the real world with a picture. (part 2)

Freecad sketches gained internal geometry in FreeCAD 1.1.0, but there's something odd about it.

* 00:01   Intro
* 00:56   Demo set-up
* 01:30   Edge from .Shape
* 01:58   Internal Shape
* 02:33   Fix-up



FreeCAD: An oddity about Sketcher Internal Geometry and how to handle it.

Importing an image to guide modeling a real world object.



* 00:01   Intro
* 01:15   Use a photo to help with the design
* 01:31   Import the image
* 01:42   Calibrate the scale
* 02:36   Correct skew of the image
* 03:28   Align on the Y axis
* 03:56   Make the X axis the axis of rotation.



FreeCAD: Modeling the real world with a picture. (part 1) XConnect

The new Tolerance Setting tool can correct seemingly small but truly vexing problems.

There is a good discussion of tolerance issues in the FreeCAD forum:

[https://forum.freecad.org/viewtopic.php?t=91343](https://forum.freecad.org/viewtopic.php?t=91343)

* 00:01   Intro
* 01:16   Triangle demo
* 02:45   Small hole
* 03:59   In closing



PyroNine9