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by ppemawm
Wed Apr 01, 2020 3:28 pm
Forum: Assembly
Topic: Assembly3, A2plus, Assembly4? Get united!
Replies: 102
Views: 9498

Re: Assembly3, A2plus, Assembly4? Get united!

Assembly 4 has the advantage that it doesn't use any solver... Actually, Assembly4 is intended to be used with an assembly skeleton or master sketch which locates all of the parts. The LCS are attached to the master sketch to avoid the topological problem. In that sense, the sketch becomes the solv...
by ppemawm
Mon Mar 30, 2020 11:38 pm
Forum: Assembly
Topic: Challenge: Constant Velocity Joint (M. Gesik)
Replies: 28
Views: 1807

Re: Challenge: Constant Velocity Joint (M. Gesik)

Here are videos of my assembly (only 1 arm, the 2 others would be similar) Thank you for the videos. An exact solution! I am so jealous that I have not finished mine yet. ....this weekend I couldn't resist the urge to try this mechanism with Asm3 WB. Thank you, too, for demonstrating the CV joint u...
by ppemawm
Fri Mar 27, 2020 7:20 pm
Forum: Users Showcase
Topic: Triger Belt Drive Kit
Replies: 13
Views: 6670

Re: Triger Belt Drive Kit

triplus wrote:
Fri Mar 27, 2020 7:08 pm
ppemawm wrote: ↑
Thu Sep 15, 2016 12:00 pm
Perhaps there is a better way? Any tips for an exact solution from anyone?

https://forum.freecadweb.org/viewtopic. ... 20#p380393
This will be a most welcome addition to the constraints. Thanks for the heads-up.
by ppemawm
Thu Mar 26, 2020 1:01 pm
Forum: Assembly
Topic: Challenge: Constant Velocity Joint (M. Gesik)
Replies: 28
Views: 1807

Re: Challenge: Constant Velocity Joint (M. Gesik)

Zolko wrote:
Thu Mar 26, 2020 10:15 am
...I attach the skeleton...
Thank you for that. I have been thinking too much in two dimensions. There is much to study in your file.
I will try to apply it to my model parts over the next week or so.

Genius you are, once again.
by ppemawm
Wed Mar 25, 2020 7:10 pm
Forum: Assembly
Topic: Challenge: Constant Velocity Joint (M. Gesik)
Replies: 28
Views: 1807

Re: Challenge: Constant Velocity Joint (M. Gesik)--UPDATE #2

To be honest, I wouldn't know how to assemble that using Assembly4. The CV joint assembly has been completed as far as I can go with Assembly4: Picture5.jpg Picture6.jpg . Perhaps a master sketch approach similar to that used by OficineRobotica's hexapod may be a solution: https://forum.freecadweb....
by ppemawm
Sun Mar 22, 2020 3:25 pm
Forum: Assembly
Topic: Challenge: Constant Velocity Joint (M. Gesik)
Replies: 28
Views: 1807

Re: Challenge: Constant Velocity Joint (M. Gesik)

Do you know the "Mesh Remodel workbench" ? Only vaguely, but it looks like it should be helpful for reverse engineering .stl files. Almost like cheating, but thank you for reminding me for next time. I like that you used Gears. I wondered if you will =). Please consider reporting you issues. I thin...
by ppemawm
Sun Mar 22, 2020 12:03 am
Forum: Assembly
Topic: Challenge: Constant Velocity Joint (M. Gesik)
Replies: 28
Views: 1807

Re: Challenge: Constant Velocity Joint (M. Gesik)--UPDATE

Thank you for your kind comments. Is this file size probably with all the mesh data included? If so, whats without mesh? Yes it was, but the file has grown to 16.1 Mb after completing two of the six geared links. With the .stl files stripped it is 14.5 Mb. The geared links were a real challenge. The...
by ppemawm
Wed Mar 18, 2020 12:06 am
Forum: Help on using FreeCAD
Topic: Bent plate, best way to add feature and avoid topo errors
Replies: 15
Views: 374

Re: Bent plate, best way to add feature and avoid topo errors

freedman wrote:
Tue Mar 17, 2020 10:49 pm
What is correct/best/new/datum/face attachment to use on the face shown
One way is to make a master sketch of the profile and map construction sketches or datum plane to the edge and/or vertex in the master sketch.
by ppemawm
Sun Mar 15, 2020 8:14 pm
Forum: Assembly
Topic: Challenge: Constant Velocity Joint (M. Gesik)
Replies: 28
Views: 1807

Re: Challenge: Constant Velocity Joint (M. Gesik)

OK, kunda1, I am taking your challenge but probably bit off more than I can chew. How could I possibly resist... My plan is to reverse engineer the model from the individual STL files from thingaverse in PartDesign and assemble it using the Assembly4 workbench. I have created all the parts except fo...
by ppemawm
Thu Mar 05, 2020 3:21 pm
Forum: Assembly
Topic: Assembly 4 workbench
Replies: 488
Views: 55071

Re: Assembly 4 workbench

I added a line on my sketch and added it in the LCS referecence and it now work as it should. Good to hear. Sometimes that is all you can do...change the way the sketch is constrained or constructed. I still don't understand why only one of the LCS attached with OXY on a line and a vertex flipped 1...

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