Getting there :)

From the video it sounds like the solenoid on the ATC, which holds the tool rack rigidly, is not being activated. Once it's wired up (using a spare relay on the PDMX or an external one, with the 24V psu) you can configure it to one of the outputs then add a line to the vbscript which runs the ATC. For example if you set the solenoid on to output #2 and put the correct pin for the relay, then you just add the line 'DeActivateSignal(OUTPUT2)' to the start of the script to switch the solenoid off so the rack can rotate, then put 'ActivateSignal(OUTPUT2)' at the end of the script to switch the solenoid back on.