Repair of stator perforator Makita

If you have determined that your stator has failed in your puncher, and you do not have the funds for a new one, or there is a desire to repair the part yourself, thenis the instruction for you. The dismantling of the Makita perforator is so simple that repairing the makita 2450, 2470 does not cause any particular difficulties. The main thing is to follow the advice given in this article.

The repair of the puncher can be performed by every user who has the skills of a locksmith and who is able to handle diagnostic tools.

Getting started

Any repair begins with an external inspection of the faulty part. And how to find a malfunction stator perforator

Makita 2450?The malfunction of the stator is most often indicated by the presence of traces of burnt insulation and the appearance of the smell of burning. This is the first sign of a short circuit of the stator windings.

But the break can be determined only by the continuity of the winding chains.

Algorithm for disassembly and manufacture of stator perforator Makita 2450,2470

Here is the sequence in the manufacture of stator perforator Makita 2450:

• Extraction from the stator housing assembly;
• Removal of the old winding, determination of winding direction, wire diameter;
• Winding of new coils according to the collected data on templates;
• Preparation of insulation for new coils;
• Insulation of new coils;
• Installation of finished coils into the core grooves or winding of the coils in the core itself;
• Solder terminals to the ends of coils;
• Reservation of windings of new coils;
• Impregnation of wound coils;
• Assembling the stator.

About everything in order

Stage I

Use a wooden hammer or a bar to disassemble the stator. Tapping the end of the stator housing, remove the stator from the housing. By the way, in order to get the stator, it is necessary to detach the stator housing from the body of the mechanical part.

Do not forget to disconnect the stator supply wires from the terminals that come out in the vicinity of the manifold. One end is attached to the brush holder, and the other end to the 220-volt supply wire.

It's time to split it into two halves.

Stage II

Collapsible stator option

Both halves of the stator are glued together with a thin layer of glue. To separate one from another, it is necessary to knock a kyanite on the stator core. If you got a non-collapsible stator, then the wire is dismantled by cutting with one end of all the coils by wire cutters. Having cut, having disassembled, we take out a wire and we measure diameter of a wire and quantity of coils. To measure the diameter of the wire, use only a micrometer. Preliminary, the wire must be burned on the flame of the match, wipe the deposit and cool it, measure it.

Most often, the coils are impregnated with an insulating lacquer that does not allow the separation of the wires.

Use an industrial hair dryer to warm the coils before disintegrating into separate wiring. You can also heat the impregnated wires in a gas oven above the burner.

When examining the stator, it is necessary to make measurements. We need to measure the diameter of the wire, the number of turns in one coil, the percentage of filling the groove of the stator, the material of which the wires are made. It is recommended to reel only with copper wires.

stator. The wires are classified by section. After measuring the wire diameter, recalculate its cross-section by the formula S = ηr ², where r = ½ d .

And now understandable language: the cross section is 3.14 times the half of the diameter in the square.

connectors What is this whole kitchen garden for? If it turns out that you have a wire of a different diameter, then you can not do without calculations. If there is a thin wire, the winding can be conducted in 2. .. 3 wires, the main thing is that their total cross section should be no less than the initial one.

If there is a wire with a slightly larger diameter, then you can reel them, provided that the filling of the grooves with the old drive was incomplete.

Stage III

Winding option for the non-assembled stator

To wind the stator coils, you must prepare a wire of a passing diameter, an electrical board or a press spoon, an adhesive tape, a heat shrinkable tubing of the desired diameter.

If you have an indiscriminate stator, then in its slots you need to make a cartridge from the presshead, cutting the workpieces along the width of the stator.

The blanks are cut from a pressure blade with a width equal to the width of the stator and a length equal to the length of the internal groove. By the way, to the stator width it is necessary to add 2 mm on each side. Cut out the blanks, their edges should be covered with a wide tape. A stitch with a width of 50 mm is suitable for the Makita perforator stator.

On the strip of adhesive tape, glue the workpiece with one side, cut it. On the second strip of adhesive tape, glue the workpieces with the same side, but with the other edge. Your task is to close the edges of blanks from gusts when winding.

Making strips of

To facilitate the winding process manually, make simple tools that are strips of soft metal up to 0.8 mm thick. It can be galvanized steel, copper, aluminum. The strips are z -shaped plates 10 mm wide and 70 mm long.

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For smaller hooks, fit the heat shrink tube and heat over the flame, press the tip of the plate.

The obtained plates are fixed with the help of an adhesive tape on the stator housing.

Winding process

The wire is prepared, the plates are fixed, the number of turns is at hand. Forward!

We put the stator on the knee, put the end of the wire, put on it a shrinkable cambric tube of red color( it denotes the beginning of the winding), fix the cambrik on the outside of the stator and start winding. By the way, the color of the cambric can be any, you just have to choose a different color for the beginning and end of the winding.

The winding process is the feeding of the wire into the groove by the thumb of the wire, drawing the wire by the hook of the tool plate, pulling out the wire and putting it behind the hook of the plate on the other side. The most important thing, watch the number of wound turns. The weight of the winding process is repeated for the second coil.

This is all perfectly visible on the proposed video.

That's all! The stator is wound. We must carefully tie the windings, make a reservation.

Stage IV

The process of booking stator windings

Armoring refers to the binding of stator coils, protecting them from destruction during operation. At high speeds, all vibrations act on all parts, which leads to the destruction of the integrity of the windings, their friction against one another, and the violation of insulation.

It's time to do impregnation.

Stage V

Impregnation process of stator windings

The main task of impregnating stator coils is to obtain a monolithic design that does not deteriorate with time from vibration. Before the impregnation begins, insert wooden spacers into the stator, pressing the coils. Work should be done carefully and carefully.

In ideal conditions, a transformer is required for the impregnation. It is recommended that the coils be impregnated under tension so that the wires vibrate and warm up. This allows the impregnation to drain into all the cracks. The voltage to the windings is small, until vibration occurs. It can easily be detected by leaning a screwdriver against the inner surface of the rotor.

LATR Ideally use a special lacquer and apply several layers. You can use ordinary paint for interior painting in the premises of PF-115.After pouring 50 g of paint into a separate dish, dilute it with a solvent to the consistency of the water.

Using a syringe, type a paint and enter in small portions on the stator coil before full penetration into the middle of the coil. The stator must be warm and connected to an alternating current source. As a source, it is better to use a transformer whose primary winding is fed through the LATR.

Do not forget to control the stator temperature. The hand can hardly withstand the temperature of the case. At a higher temperature, lower the supply voltage to the transformer with a LATR.

The consistency of the paint depends on the diameter of the wires. The thicker the wire, the thicker the paint. Impregnation lead until the paint appears below. Turn the stator over, continue impregnation. Leave the stator under the direction until it dries completely.

The stator is impregnated and, after cleaning from traces of paint on the inner surface of the stator, is ready for assembly.

Impregnation and rewinding of the stator

Now you can start assembling the Makita perforator. If you think that this is difficult, then the job of rewinding is better for professionals.