Combining high speed turning operations with fast acceleration and deceleration provided by linear motors has resulted in the successful sales of its Twin Spindle Tu.

Twin-spindle VTL has linear drives Combining high speed turning operations with fast acceleration and deceleration provided by linear motors has resulted in the successful sales of its Twin Spindle turning machine DV-Transfer 250 in Europe, said Hessapp at EMO. The twin spindle VTL offers a linear X-axis feed of up to 75m/min with an acceleration of 6m/sec2, so minimising idle time between operations by up to 50% compared with conventional ballscrew drives, said Hessapp. The company now produces a larger version with more power and a maximum swing diameter of 320mm.

The existing machine has a maximum turning diameter of 200mm and swing of 250mm by 250mm workpiece length, including chuck.

The new version has a maximum turning diameter and swing of 320mm and workpiece length, including chuck, of 300mm.

It has a 36kW/386Nm/5000 rev/min spindle as compared with the smaller machine, which has a 31kW/200Nm/6000 rev/min main spindle.

Both machines have 12-tool turrets.

Machine design is based on a box configuration with a common cross rail supporting the two pick-up spindle heads.

Workpiece conveyors deliver/despatch components from each side of the machine.

Either the two spindles can work independently, or together, with a turnover/buffer station in between.