Gearing system, Driving Mechanism & Production Calculation of Tappet Loom

Tappets are generally used in loom for heald shedding. In the simplest types of tappet-shedding motion, the shedding cams or tappets are mounted on the bottom shaft and the motion is suitable only for weaver repeating on two picks. Such as plain, weft rib or hair cord weaver. The principle of tapper shedding motion consists in using a tappet inspiring upon an anti friction roller or bowl, supported in a treadle, the heald shaft being directly or indirectly connected to the treadle from which it is operated. A very large portion of the total output of woven depends on tappet looms.

Objectives: To know about the gearing system and production system of a tappet loom.

Related machine parts

1. Motor
2. Motor pulley
3. V-belt
4. Machine pulley
5. Crank shaft gear wheel
6. Bottom shaft gear wheel
7. Tappet

Diagram

 Gearing system

Motion transfer system:

 Motor Motor pulley

Machine pulley

 Crank shaft

Bottom shaft

Tappet

1. At first motor is rotate by the help of electricity
2. The motor pulley is joined with motor when the motor is rotate, it also rotate with same motion
3. The motor pulley and machine pulley is linked by the help of v-belt. The motion of motor pulley is transferred to machine pulley by v-belt.
4. Machine pulley contains the crank shaft which contains a gear wheel with teeth.
5. The bottom shaft get motion from crank shaft by the contact of crank shaft wheel and bottom shaft wheel. The teeth number of bottom shaft wheel is double than crank shaft. If crank shaft rotate once weaving cycle will be complete.

Production calculation

Here,

Motor RPM = 950

Motor pulley dia = 21cm

Machine pulley dia = 136.5cm

Crank shaft teeth = 36 

Bottom shaft teeth = 72

Picks per inch (PPI) = 44

Fabric width = 38 inch

Now,