VB Manufacturing, Phoenix House, Tern Hill, Market Drayton, Shropshire, TF9 3PX
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    Controls

Safe turning parameters can be set or altered from any chosen position without ever having to reach around rotating work

"User operated" and "automatic" control functions are uniquely provided for within the VB36's standard specification.

Controls are immediately accessible irrespective of workpiece size and shape.
      I t is never necessary to reach over or around a rotating workpiece —  which may have uneven or sharp edges and enormous momentum. All control functions can be selected and operated through switches or dials that are housed in a magnetically backed box. Simply position the box on any flat metal surface, or hold it and stand wherever convenient to observe and fine tune rotation requirements before proceeding with the work.
Every practical option is provided for precise direction of the turning process.
      Control functions include direction of rotation; acceleration and braking times; infinitely variable revolutions without loss of torque, and positive Start/Stop operation. Drive parameters can therefore be simply set to aid rough turning, final shaping, sanding, application of sealers and finish coats, and final polishing with and/or against the lie of the grain.
Designed to eliminate common mechanical and electrical hazards. 
      Most importantly, the speed selection dial cannot be operated inadvertently to engage a dangerously highspeed (as can lever or single action dial controls). Also, the very high currents and voltages associated with phase conversion electronics are contained in the main control box housed inside the VB's sealed cabinet base. Control circuits outside this, including the leads to the control box and footswitch, are transformed to 24volts for perfect safety.

Footswitch — for hands-free operation:

     The (optional) footswitch is inoperative as long as the hand control is switched off. Once the hand control is switched to the ON position, full ON/OFF functions can be effected through either the hand or foot controls.  Acceleration and/or braking times as well as the desired speed will be as you choose to set them by means of the hand-control unit in the normal way. All hand-control functions continue to be fully operative during a foot-switched cycle.
     The footswitch is rated for at least 200,000,000operations. It is sealed for protection against dust and shrouded to guard against accidental operation. For electrical safety, the switch is connected through a 24 volt spur and can either be factory-fitted, or added later.

Automatic control systems:

 Micro-switches:
    Both the rear handwheel cover and transmission access door are micro-switched to stop the lathe immediately if either is opened when the lathe is running. Similarly, the lathe cannot start if  the shaft lock-ing and indexing bar is left in place.
 

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Prevention of accidental re-start:

     If for any reason the mains power supply to the lathe is interrupted, the machine will of course stop. In these circumstances the normal ON/OFF control will not have been used and the switch would remain in the ON position, allowing the lathe to re-start, perhaps without warning, as soon as the mains supply is restored. This is prevented by means of a  "No Volt Release" circuit that automatically trips out the normal control functions if power supply is interrupted. The lathe cannot re-start until the NVR switch is operated by a deliberate action of the lathe operator. Once this has been depressed, normal control functions are restored to the hand (and foot) switches.
     Combined with the NVR circuit switch is another  protective feature that automatically senses and switches off the power if the motor begins to overheat due to sustained overload. The complete switch assembly is referred to as a "TONVR" switch and, in the case of the VB, is conveniently located at knee level on the nearside of the cabinet base. It has a hinged cover that can be locked (small padlock required) to prevent unauthorized use of the lathe. 

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HEGNER U.K.
Phoenix House, Tern Hill, Market Drayton, Shropshire, TF9 3PX, England.

SALES: +44 (0)1630 637375
TECHNICAL: +44 (0)1630 637376
FAX: +44 (0)1630 637377
E-Mail: sales@hegner.co.uk