Six-axis vacuum-compatible motion solution
09 November 2015
Earlier this year LG Motion delivered a six-axis vacuum-compatible precision motion system to AWE Aldermaston which is being used to determine properties of X-ray diffraction crystals prior to installation into X-ray sensitive diagnostics for fielding on laser plasma experiments.
The PC controlled ‘two crystal characterisation positioning system’ includes three stepper motor driven rotary tables and a 350mm travel stepper driven linear axis which combine to support optical diffraction mounts and sensors, with two 35mm travel manually adjustable linear stages used to pre-position static optical equipment.
LG Motion’s pre-programmed user interface enables operator and supervisor level access to set-up and calibrate the optical system, and to load and run coded pre-defined characterisation routines that run across the PC and the motion controller, producing and storing characterisation data.
The system includes a control cabinet which houses the motion controller and stepper motor drives, with all positioning mechanics mounted on an aluminium baseplate. AWE integrated the mechanics into the vacuum chamber with connections through the vacuum bulkhead to the cabinet via 5m cables. The scope of supply included 10-6 vacuum preparation with special lubrication and holes as through-holes or bleeder cross holes to avoid any possibility of cavities forming under vacuum.
The rotary and linear stages were vacuum modified standard tables from LG Motion’s LG series – a range of standard linear, rotary and elevation stages with stepper or servo motors that are designed to provide complete multi-axis positioning solutions.
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