Since those pocket edges are not on a flat surface how should that loft end? What surface should the geometric kernel assume between those edges to close the loft solid? It looks obvious to you since this is the result you want. But there are many other probable solutions - e.g if a slot is cut from...

I'm sure kisolre would want to know this and could give better advise. Not sure why am I involved here ;) There was a recent discussion about turning several threaded holes threads on/off at once and I was wandering why not use expressions... but the boolean properties did not have the f(x) icon so...

Here a simple "recompute all" fixes the issue. Since it is the same OCC version not sure what else have changed to impact the result. ``` OS: Windows 8 build 9600 Word size of FreeCAD: 64-bit Version: 0.22.0dev.35803 (Git) Build type: Release Branch: main Hash: 90c90f705bec20faf4b8bb419574...

teletypeguy wrote: ↑Tue Jan 23, 2024 5:38 pmWhat if,

To achieve that you can simply Deactivate the attachment after closing the sketch. But as ChrisB mentioned it will not follow that plane if it changes.

teletypeguy wrote: ↑Tue Jan 23, 2024 12:42 amHmm.

Ask the OpenCascade guys This is the way how that kernel works. You generate things trom other things but the last result does not play any role in generating the next one.

Some sets of constraints might fully constraint a sketch but also have multiple valid solutions. And if you make a big change in a dimensional constraint some of the other solutions might be near the initial mess so the solver finds them first and not what you would expect. Check Sketcher_Tutorial s...

It is called "Sketch Flipping". Try reducing the size in smaller increments. not 1200->600 but 1200->1100; 1100->1000. You might have to go to lower steps that the smallest dimension in that direction (22mm here). Or if you want to do that from within the sketch edit mode change the 1200 c...

You should understand what TNP stands for and plan ahead. Yes, using external geometry is prone to TNP. But this not mean to avoid them altogether. If you need to make Top 300,1 mm to compensate for material shrinkage for example how do you do that? Change the dimensions in all sketches? You either ...

You somehow mangled the first sketch attacher. To restore if RMB over the properties/ShowAll and then copy/paste from another sketch. Then uncheck ShowAll to avoid future mishaps.

I tried a GearCutter aproach ( https://evolventdesign.com/blogs/history/choose-a-gear-cutter ). Not sure if the shape is correct but I was wondering "How were those manufactured in the past?" I used a shapebinger off a PD InvoluteGear for grooving tool. The 11 deg angle was just eyeballed....