# Rieter

### Variation in the speed of the traveler

#### Index

Fig. 89 – Different winding diameters

In contrast to the roving frame, the winding diameter in the ring spinning frame changes continually with raising and lowering of the ring rail, since the winding layers are formed conically (Fig. 89).

The traveler must have different speeds at the base and the tip. Assuming, for example, a spindle speed of 13 500 rpm, the layer diameters given (as in Fig. 89), and a delivery speed of 15 m/min, the traveler speed at the base will be:

$n_{TB} = 13 500 - \frac {15 000}{46\pi}$
$= 13 500 -104 = 13 396 {min^{-1}}$

and at the tip it will be

$n_{TS} = 13 500 - \frac {15 000}{25\pi}$
$= 13 500 -191 = 13 309 {min^{-1}}$

In comparison with the constant speed of the spindle, the traveler has a changing speed difference of 0.77 to 1.41%.