a2plus crank confusion

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Frotz
Posts: 105
Joined: Thu Jun 21, 2018 1:52 am

a2plus crank confusion

Post by Frotz »

I'm trying to get the hang of the a2plus workbench and have successfully made a crank. But what I really want to make is a lever or a knob. Here are two mechanisms that are identical save for the one on the right does not have a crank handle attached. I can move the radial part (spinner) by grasping it or the handle. But I can't move the one on the right. What did I miss?
crank-test.png
crank-test.png (172.25 KiB) Viewed 989 times

Code: Select all

OS: Debian GNU/Linux 12 (bookworm) (MATE/mate)
Word size of FreeCAD: 64-bit
Version: 0.21.0.32637 (Git)
Build type: Release
Branch: master
Hash: 7fa7cb7f0b222864be7416c683166876eab190bc
Python 3.11.2, Qt 5.15.8, Coin 4.0.0, Vtk 9.1.0, OCC 7.6.3
Locale: English/United States (en_US)
Installed mods: 
  * Pyramids-and-Polyhedrons
  * sheetmetal 0.2.63
  * freecad.gears 1.0.0
  * A2plus 0.4.60k
  * fasteners 0.4.56
  * Manipulator 1.5.0
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asm-test.zip
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chrisb
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Posts: 53919
Joined: Tue Mar 17, 2015 9:14 am

Re: a2plus crank confusion

Post by chrisb »

Moved to Assembly forum.
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Syres
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Posts: 2893
Joined: Thu Aug 09, 2018 11:14 am

Re: a2plus crank confusion

Post by Syres »

Frotz wrote: Thu Mar 30, 2023 9:44 pm I can move the radial part (spinner) by grasping it or the handle. But I can't move the one on the right. What did I miss?
It's a long time since I used A2Plus so I updated to the current version but it looks like a bug in the workbench to me. It's as if the hole in the opposite end of the spinner is having some unwanted impact on the solving routine. @dan-miel Would you care to correct me?
dan-miel
Posts: 391
Joined: Thu Sep 13, 2018 12:29 am
Location: Spokane WA. USA

Re: a2plus crank confusion

Post by dan-miel »

Syres wrote: Mon Apr 03, 2023 10:06 am @dan-miel Would you care to correct me?
No. I have also had problems with this tool, especially round parts, but never sure if it was the program or the way I built the assembly.
Dan
Frotz
Posts: 105
Joined: Thu Jun 21, 2018 1:52 am

Re: a2plus crank confusion

Post by Frotz »

I've gone through the other assembly workbenches, and this seems to be the only one that allows me to manually move things around. Am I missing an alternative to a2plus for this purpose?
odaylton
Posts: 9
Joined: Mon Jul 24, 2023 3:25 am

Re: a2plus crank confusion

Post by odaylton »

Frotz wrote: Thu Mar 30, 2023 9:44 pm I'm trying to get the hang of the a2plus workbench and have successfully made a crank. But what I really want to make is a lever or a knob. Here are two mechanisms that are identical save for the one on the right does not have a crank handle attached. I can move the radial part (spinner) by grasping it or the handle. But I can't move the one on the right. What did I miss?

crank-test.png

Code: Select all

OS: Debian GNU/Linux 12 (bookworm) (MATE/mate)
Word size of FreeCAD: 64-bit
Version: 0.21.0.32637 (Git)
Build type: Release
Branch: master
Hash: 7fa7cb7f0b222864be7416c683166876eab190bc
Python 3.11.2, Qt 5.15.8, Coin 4.0.0, Vtk 9.1.0, OCC 7.6.3
Locale: English/United States (en_US)
Installed mods: 
  * Pyramids-and-Polyhedrons
  * sheetmetal 0.2.63
  * freecad.gears 1.0.0
  * A2plus 0.4.60k
  * fasteners 0.4.56
  * Manipulator 1.5.0
it is a limitation of the A2 Plus where the second piece is always stuck to the first and it is necessary to have a third piece for the second to move
normally the first piece is fixed in the world and the second is tied to the first until a third piece appears and so the movement of the second happens
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