topic Re: PROBLEM: Different link types. HELP!! in 3ds Max Animation and Rigging Forum

PROBLEM: Different link types. HELP!!

Anonymous — Sat, 24 Nov 2018 03:36:11 GMT

Hi smarties. Dummy here.

I need to produce an active model of a particular style of lever press, but I can't figure out how to configure the linkages / constraints as there are different types required (it's probably easy as heck but I'm a bit backward at times lol)

In a nutshell, I need to rotate lever 1 anti-clockwise which will in turn push 5 down with incredible force for a hole punch.

Any help would be greatly appreciated (step by step would be insane!!!!)

Thanks in advance 🙂

Re: PROBLEM: Different link types. HELP!!

Anonymous — Sat, 24 Nov 2018 09:03:01 GMT

EXAMPLE (I used curve editor) It's very rough.

How to make this an interactive model?

Re: PROBLEM: Different link types. HELP!!

Anonymous — Sat, 24 Nov 2018 09:05:12 GMT

Re: PROBLEM: Different link types. HELP!!

leeminardi — Sat, 24 Nov 2018 14:36:59 GMT

You have checked this as being solved. Are you still looking for a solution?

Note, what you have configured is known as a 6-bar linkage. For the purpose of rigging it with Max you can consider it as a two 4-bar linkages with shared links. The first has only pivot joints (the 2 blue links plus the long green link, plue ground). This can be modeled using an HI IK solver. 1:00 to about 4:00 of this video show you how to rig a 4-bar linkage. Note you do not need to use bones as I did in the video.

The second 4-bar linkage (that includes the magenta link) is essentially a piston also called a slider-crank mechanism. The best and most accurate way to model piston action that I found is using expression controllers as I did in this video and this one.

If you need more help with the rigging post the file and I will give it a try.