Rotational Lock

Hello, I recommend asking SOMA or RSTI about this particular issue. 

Check the operating manual listed here.

HI, Thanks for that, however its the SERVICE MANUAL that is required, not the operators manual which we already have. There was another post for the Varic, requesting a service manual, however can't find it for the list of docs for the Arcadis Varic. Was this ever uploaded. Thanks D

There should be a small rubber cap adjacent to the locking handle on top of the column. under that you can adjust an allen to increase or decrease tension to lock.

A contributer explained to adjust the Allen screw under the rubber cover at end of horizontal arm, this is correct.

The factory recommended to use some locktite as the screw can come loose and in some cases fall out.

Tom