It blows air into the required items. It has a motor and a blower. It has an arrangement that the air comes out through a nozzle. The machine is used to clean the surroundings from dust. It was an induction motor.
Plastic Sealing Machine
Plastic sealing machine is used for sealing packets after filling with items. Even liquids can be filled.
The machine has a heater which can be adjusted with thermostat which controls the temperature of the heater. We keep the plastic cover on the heater and press with a pressing arm. The plastic cover gets heated up in a line and gets sealed.
There are different sizes in the machine. We are using 12 inches machine. It operates on 220 volts.
Electrical Screw Driver
This is a machine used like a screw diver.
This machine will have screw driver bits.
It uses a universal motor and reversible motor so that the direction of the motors can be changed.
This machine is used to fix the screws and also remove the screws.
It uses 220 volts power supply.
This electrical instrument is the most important tool for the persons who work on electrical and electronic appliances.
The most important part of the soldering iron is its element.This element is covered by a cover.This cover is known as element cover.
ELEMENTS OF SOLDERING IRON-
Soldering irons are of different voltage power.Mostly soldering iron of 10watts, 15watts, 25watts, 35watts and 40watts are used.
The heat from the iron increases with voltage.
If element burns out, then other element of the same voltage power can be used.
The second important part of the soldering iron is the bit.
The bit of soldering iron is made up of copperthis is also filled according to the voltage.The bit used is of same voltage as of the voltage of element.
When an element of the soldering iron burns out it has to be replaced. For this first of all the handle is opened to remove the main lead and wires of the element are made loss. Now nut on the element cover is opened to remove half of the element cover. Now the element is fitted in the same way as of the old element. In the end, bit is placed between the two elements and then cover of the element is tightened.
After fitting new element in the soldering iron, before giving supply to it the resistance must be checked on the two end ends of the main lead. In the 10 watts soldering iron this resistance must be about 1 K ohm. If the resistance between the two ends of the main lead is zero then it main lead is short. In this case remove the main lead and check the resistance of element.