# Rieter

### Conditions at the traveler in the plane through the spindle axis

#### Index

These conditions were formulated by Professor H. W. Krause and Dr. H. Stalder, of ETH, Zurich.

The influence of the yarn on the traveler can be expressed in terms of two forces (see Fig. 94). One of these is tensile force FF, acting at an angle a to the x-axis. The other is a force FB, which arises from the balloon and can be assumed as tangential to the balloon curve. This force draws the traveler upwards at an angle γ to the y-axis. Thus the traveler is drawn upwards at an inclination by the resultant force FL of the two components (FB + FF ). As the ring rail goes up and down, the angle σ therefore undergoes substantial variations.

Furthermore, the traveler is subjected to the forces FZ (centrifugal force) and FN (normal force). The weight of the traveler can be ignored here.

At constant traveler speed, the three forces FL, FZ, and FN are in equilibrium, i.e. they intersect at point P and form a closed triangle (Fig. 95).

Fig. 94 – Resolution of forces at the traveler: a, in elevation; b, in plan

Fig. 95 – The resultant tensile force FL on the yarn