This is the CNC driven version of the ST 51 rotary table. You can order the table as shown, or if you already have our ST 51, we can supply a simple instruction file on how to upgrade to the CNC version. The table retains all the manual functions and can still utilize the ST 51 T adjustable tailstock. The CNC version comes with a stepper motor tuned for the A axis on the Gecko drive. Your machine computer already is configured for the A axis as a rotary table. The unit has very fine resolution due to its 40 to 1 drive ratio and microstepping drive. The table has an adjustable eccentric to maintain full contact of the worm gear to the crown wheel for minimum lash.