- Description
- Function drawing
Function
On an ELGUIDER pivoting frame system, the web changes direction four times, each time by 90°. The system is based on a pivoting frame with two path rollers. The imaginary pivot point is located on the infeed plane. Lateral web corrections can only be achieved by pivoting around this pivot point.
The prerequisite here is always sufficient tensile force for friction-locking between the web and the positioning roller.
Area of use
Thanks to optimized exploitation of the elasticity ranges, the pivoting frame is particularly suited to use even in tight spaces.
Application
The greater the web tension, the modulus of elasticity and the required correction, the longer the infeed, exit and transfer paths should be designed. Experience has shown that these paths should be the equivalent of 60 to 100 percent of the web width. The sensor should be positioned behind the positioning roller, as near to it as possible.
Legend
A-A = Web tension distribution at infeed | B-B = Web tension distribution at exit | K = Web correction | a = Correction angle | σ1 = Basic web tension | σ2 = Tension distribution due to pivoting movement of roller frame at the infeed | σ3 = Tension distribution due to pivoting movement of roller frame at the exit | 1 = Pivot point | 2 = Infeed roller | 3 = Roller frame | 4 = Sensor | 5 = Locking roller | LÜ = Transfer length | L1 = Infeed path | L2 = Exit path | AB = Operating width
