External Axis Problems

neil

I am having unresolved problems relating to the mechanism modeller in RS.
I am trying to model a robot and gantry system in RS using the mechanism modeller. The real system has the Electronically Linked Motors option and the axes are set up in the following way:
Axis 1 - X direction (master)
Axis 2 - Y direction
Axis 3 - Z direction
Axis 4 - X direction (slave)

I am unable to set up Axis 4 using the mechanism modeller as each parent and child link must be unique(p459 RS manual). I have tried to add the X-axis link again with a different name but this is not possible. Trying to create Axis 4 as slave to Axis 1 (de-selecting "Active" checkbox) results in a fatal error:

"An unhandled exception has occurred. PLease report using the RobotStudio System Info Tool. The application is now in an undefined state. We recommend you exit the application....."

Crash info from Support Tool is in the attached zip

2007-12-17_101653_RobotStudioReport_2007-1217_101500.zip

I am able to model the gantry, but only with 3 axes. Because the real system is set-up with 4 axes, I am unable to teach target points or program offline.

Thanks in advance,
Neil