The Variax VG series is strictly a mechanical, cam-driven gripper feed with a variable feed pitch, just like the V series. The movement of the VG series can be illustrated by considering how we would use our hands to feed string.

Start with the fingers of both hands holding the string. At the start of the feeding motion, the left fingers release the string and the right hand pulls it forward. When the right hand finishes its pull, the left fingers grip the string again and the right hand releases its grip and returns back to its original position. The right hand now re-grips the string and poises ready to repeat the feeding cycle again. The string would thus appear to progress intermittently. It is important to understand that while the hands only move slightly, the string is held firmly - unlike the way a roll feed would press and roll its surface along the material - so the string is fed with a soft touch while being held firmly but gently between the fingers.

The VG series does a true mechanical reproduction of this feeding cycle. In order for the VG series to reproduce the smooth motion of the hand and fingers, it uses four cams, including a roller gear cam machanism, with a uniquely-designed grip jaw that functions like the fingers of a hand. This pressure is exerted evenly on the material so that no pressure marks or scratches occur. This is how the VG series differs from roll feeding methods making it suitable for feeding delicate plated material or light pliable material. It can also be used to feed irregularly-shaped material or semi-processed material.

Parameter Name	Parameter Value
Type	gripper