Product name：Automatic feeder

Item number：KX1389

"Size"：95*75*120 mm

Weight：100 g

Material：Plastic+Hardware accessories+Foam accessories，

Packing：300 pcs

Box gauge：600*400*550mm

Serving and receiving serve hold special significance in table tennis matches。The technology for shooting down the Earth can develop The player was in a stalemate with the opponent at the baseline,The ability to maneuver,The technique of approaching the net and intercepting from the air in front of the net It can effectively break through the opponent's defense line,Put the other party in a passive position,In contrast to shooting down the Earth from the baseline and intercepting from the air，Serving is a rather difficult technique to master， Because more body parts are involved when serving，The range of motion is relatively large.，The coordination process of the muscles is required High degree，But even so，It's not particularly difficult to learn to serve well，Because of the initiative in serving The power lies in the hands of the batter himself，Whether it's throwing the ball or hitting it with the racket, it's all under one's own control，All the server has to do is create for themselves Under the best conditions and according to one's own intention, throw the ball out。Control the serve under the best conditions,Also, everyone must control the force well when serving，Do not serve a dead ball when serving。

I have understood the significance and importance of serving，Now let's make a small automatic serve machine together。

"Production"：

 1，Recognize and prepare the materials needed for the experiment。

2，Install in sequence according to the steps in the manual。

3，After installation is completed, proceed with debugging。

 Principle：

 Its basic working principle is based on the friction ball principle of the rotating wheel，The small ball can obtain a certain initial velocity due to the action of a rotating friction wheel。

1、When the power is connected, the motor inside the ball supply device works，Drive the rotating wheel to rotate，Put the small ball into the ball feeding device。

2、The ball is sent out by the rotation of the blade wheel inside the ball feeding device，It reaches the ball outlet at the machine head through the ball feeding pipe。

3、After the small ball reaches the ball outlet，The drive wheel rotates and rubs against the small ball, thereby causing the ball to be emitted。

 "Explore"：

 1，What small knowledge have I learned by assembling the automatic ball dispenser？

2，What principle does the automatic serving machine apply？

3，What are some things in life that are similar to the principle of an automatic ball machine？