I hate to ask this because it seems so simple, but I’m obviously having a brain cramp.

I have a dual set of rear axles on a tractor trailer. They are attached to a dummy object which is centered between the dual axles. This dummy object should pass along positional and Z-axis rotational information from the dummy, but am having issues with the pivot point misbehaving.

If the tires are detached, they rotate correctly locally around their own centers (their pivots have been centered and aligned okay). If they are linked to the dummy, they move with the dummy and rotate around the dummy’s center.

I need them to rotate around their own centers, while moving with the dummy. I thought that this might be an issue with turning on/off an Inherit setting under the Hierarchy, but I’m not getting proper results there and sure I’m looking in the wrong place. (Essentially, turning off inherit rotation leaves the axles are rotating about a center which is neither their own, nor that of the dummy - maybe a world center?.)

Your suggestions?

Thanks,
John

Don’t link them...Constrain them (Orientation)

3ds Max 9 thru 2013
Windows 7 Enterprise 64-bit OS SP1
Dual Intel® Xeon® 6 core X5650 @ 2.67GHz CPU 36GB RAM
NVIDIA Quadro 4000
450GB HDD (x3) and 2TB HDD

3ds Max 2012 Certified Professional Models to Motion

Thank you much. That’s what I was forgetting.