Hinge problem - collision detection

Chr15Williams · 2 May 2020, 10:33

Hi
First post so please be gentle!
I have tried to solve this issue myself and have searched widely for the answer to no avail, so here I am. I hope this is ok.

I'm trying to do something that I feel should be very simple, but cannot get it to happen. Using SU for a woodworking project in which parts pivot about hinges. What I am trying to achieve is SU showing what would happen if there is something blocking the part from moving. At present, the part just flows through the obstruction when I use the rotate tool. I have tried using MSPhysics hinge tool, but that doesn't work properly for me either as the part still enters the blockage.

If anyone could help I would be very grateful. Example skp file attached plus jpg images of what I want to see as the limit of movement (right) and what actually happens (wrong).

Thanks!

Chris

ntxdave · 2 May 2020, 14:40

I have not used MSPhysics but in watching some example videos on this forum I thought there was a collision detection setting.

ecati · 3 May 2020, 08:10

Is it such a thing?
Click on the picture for animation.

Simple hinge_ecati.skp

Chr15Williams · 3 May 2020, 14:55

ntxdave: if there is a collision detection setting then that sounds like it might do the trick. Anyone know if such a thing exists and where it could be found?

ecati: thanks for trying the MSPhysics route. I've tried the same, but with the blocking bit of wood static as well as the base. The lever arm hits it, goes into it, bounces back, but then remains partially embedded - not the way wood acts! See my version and the screenshot showing the embedded bit.

Thanks for the views and suggestions, folks. If anyone has any other bright ideas I'd be delighted to hear from you.

Simple hinge MSPhysics.skp

ntxdave · 3 May 2020, 16:42

Suggest you add "collision dictation" to your thread topic so those more familiar to the plugin migh respond. In doing some quick research I think there is some way to accomplish you need but I do not have experience with the plugin. Hope some can give you help.

ecati · 3 May 2020, 16:50

Choose this and try again.

ntxdave · 3 May 2020, 19:10

Might also help if you could described what you are going to do with this.

Chr15Williams · 4 May 2020, 12:10

@ecati said:

Choose this and try again.

That worked perfectly - thank you!

Chr15Williams · 4 May 2020, 12:12

@ntxdave said:

Suggest you add "collision dictation" to your thread topic so those more familiar to the plugin migh respond. In doing some quick research I think there is some way to accomplish you need but I do not have experience with the plugin. Hope some can give you help.

I'm following this lead, though using "detection" rather than "dictation"! Thanks for your help.

Chr15Williams · 4 May 2020, 12:17

@ntxdave said:

Might also help if you could described what you are going to do with this.

I'm building a folding bench/picnic table and am trying to test out the folding mechanism to ensure nothing interferes with anything else as it folds. Still plenty to work on to get this hinge thing working. The basic drawing I'm developing is attached.

AutoSave_Folding+picnic+banch+new.skp

ntxdave · 4 May 2020, 21:50

@chr15williams said:

@ecati said:

Choose this and try again.

That worked perfectly - thank you!

Glad someone familiar with the plugin could help you. I looked at your model and it would be interesting to see the animated version when you are done.

Chr15Williams · 17 May 2020, 11:39

@ntxdave said:

@chr15williams said:

@ecati said:

Choose this and try again.

That worked perfectly - thank you!

Glad someone familiar with the plugin could help you. I looked at your model and it would be interesting to see the animated version when you are done.

Here's an animated version, but not SketchUp! At least it shows what I was trying to achieve. https://youtu.be/-l2qe277JJE