1.
I think the problem is not the cnode itself. You have to couple the cnode with your nozzle/
tower and give the connected directions as "restraints" X,Y,Z,rx,ry,rz).
Here may be the problem. The stiffness of restraints is a value which comes from your
configuration settings and if the defined values are to small, your nozzles are not "completely"
coupled with the possibility of small difference displacements/rotations.
Try to give a higher stiffness value for each of the restraint directions,
which will overwrite the standard value for the special restraint direction in
your "cnode model".
2.
The node is in the restraint output.
3.
The model without cnode.
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Michael Bau