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IRB2400 joint2 and joint3 relation



Hi,
I am using the IRB2400 in ultragrip(Delmia), but from ABB website it is no -igrip file avaiable, so I had to build the mechnism myself.
My question is what is the joint3 limition relation between joint2 and joint3, as we could see when we jog the joint2, the joint 3 will move with Joint 2?
 
Thanks in advance!