Bench-top jigsaw machine - equipment for cutting, sawing out curly parts from various materials. Its feature is the ability to cut while maintaining the integrity of the outer contour of the workpiece. Depending on which file is installed on the structure, the machine can process natural wood, its derivatives, plastic substrates or metal.
The device is indispensable for construction and repair work, the production of furniture, souvenirs. Often equipment is purchased for domestic purposes. Sometimes it’s irrational to buy a factory unit: you can make a jigsaw yourself. The photograph shows the design of the tool.
The device and principle of operation
A stationary factory model includes a working table for a jigsaw, a unit with a cutting element, an electric drive and a crank mechanism mounted under the tabletop are fixed on it. The tension unit is installed in the upper or lower part of the machine. Many models of units allow you to cut the material from different angles. This is necessary for making an inclined cut.. Often for convenience, marking is applied to the rotary mechanism, stops, guides. The length of the cut depends on the dimensions of the table, in most models it is 30–40 cm.
The power of an electric jigsaw may be small. For domestic purposes, a unit with a power of 150 watts is enough.
An important element is the crank mechanism. He is responsible for the quality of the transmission of engine torque to the translational-reverse movement performed by the cutting element in a vertical position.
A standard jigsaw tool is characterized by a vibration frequency of up to 1000 per minute with an amplitude of 3-5 cm. In some samples, it is possible to adjust the processing speed of various materials. In most cases, a saw up to 35 cm long is installed on such a tool, which allows cutting parts up to 10 cm thick.
In order for the cutting element to serve for a long time without breakdowns, cracks, it is necessary to provide it with optimal tension along the entire length. To do this, use coil and spring springs. As an additional option, an air pump is provided on the factory machines to divert sawdust from the cutting line. A block with a drilling installation is useful, but for each additional node it is necessary to pay extra.
Assembly instruction
Jigsaw is made from the compressor of the refrigerator, a conventional drill. The cutting blade can be set in motion by the motor from the washing machine. Another option is the use of hand jigsaws, old sewing machines. The figure shows a design drawing.
How to remake a manual jigsaw
The table is made first of all. For this, a sheet of thick plywood or metal is used. Through holes are cut in it for the cutting blade, fasteners. Through them, the manual assembly placed below is fixed to the supporting structure. Next, the jigsaw table is attached to any stable wooden table. Guide rails are added.
If necessary, the machine can be quickly disassembled.
The standard device is equipped with springs that provide the file with the required level of tension. You can not do without the rocker arm, one of its edges is under tension of the springs, the second provides fastening to the cutting element of the jigsaw machine. You can also clamp the web between the two guide rollers.
Before starting work on a home-made jigsaw, the pendulum stroke must be turned off.
Sewing Machine
The jigsaw from the sewing machine contains a file travel regulator provided with a speed switch on the equipment.
For the manufacture, the weaving mechanism is removed. In most designs, it fits below. Unscrew the bolts, knock out the cotter pin, remove the drive shaft leading to the knot of weaving threads.
Then the upper protective panel opens, the groove along which the needle moved expands to the file width parameters. Saws for a jigsaw are slightly modified: they are cut according to the dimensions of the longest needle that could be installed on the machine. In order not to make an adapter for fixing the cutting element to the seat, grind the upper cutters, sharpen the lower part of the blade. A cutter is installed in the needle holder. After that, they start cutting the blanks.