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Servo-Technique

VKI3 - 15628 VKI

Sensors

Strip edge position sensing

View Application/functional description

Function:

Sensing of the edge position of strip and metal foil

Mechanical design:

Extruded aluminium section with polyamide cover plate and traversing inductive edge sensors

Hydraulic connection:

Two machine plugs, screw type connection

Colour/weight:

Depending on design / length

Application:

The VKI inductive sensing system is used for sensing the strip edge or the strip centre of metal strip or foil. Both strip edge and strip centre guiding systems are possible. In the case of strip centre guiding, sensing of the strip width is possible as an optional extra. The sensing system type VKI is maintenance-free and insensitive to splash water and dirt. The sensing accuracy is ± 1.0 mm.

Structure Output of measured values

The VKI sensing system consists of a measuring beam which is arranged beneath the metal strip subject to sensing, and in the immediate vicinity of a deflector roll (e. g. flatness measuring roll). The necessary electronic unit is mounted separately. The measuring frame is made from a rugged extruded aluminium section, the surface being covered by a glass-fibre reinforced polyamide plate to ensure splash resistance (IP67). Travelling inductive edge sensors are installed below the cover plate on one or both strip edges. They follow the strip edge in rigid position control loops and signal their position values continuously to the electronic unit. Based on these position values and the sensor covering, the positions of both Other interfaces are available on request . When determining the sensing range M, a possible lateral offset of the strip must be taken into consideration. strip edges , the strip position and the The length of the measuring beam may be selected to suit the line width, independently of the strip width. strip width are calculated. Data output is either via Profibus or analogue/digital signals. The electrical connection is carried out using two plug-in connectors which are fastened to the sides of the measuring beam. Profibus L2DP – Slave Transmission format: integer in word format, beginning with data word ZERO Edge position 1; edge position 2; strip position; strip width; monitoring. The base plates used for fastening, which are provided with 2 through-holes Ø 18 mm each, can be shifted on the lower side of the extruded aluminium profile by ± 25 mm.

Dimensions

Measuring ranges which are not permitted: in the case of two strip edges, strip position, strip width M0 = 450 mm in the case of one strip edge M0 = 0 mm Document No.: DB_VKI_00_en File name: DB_VKI_00_en Designation: Kurzdatenblatt