Do-it-yourself coffee grinder repair Polaris

In detail: do-it-yourself Polaris coffee grinder repair from a real master for the site my.housecope.com.

Kitchen coffee grinders by the type of mover are divided into manual, electric, repairs are required by both. Let's see how the models of the selected class of household appliances are arranged, what kind of care is required, how to properly conduct maintenance. A kitchen coffee grinder is one of the simplest appliances from an electrical point of view. There are no speeds, in the best case - adjustment of the degree of grinding. Adjustment is carried out by mechanical methods. Let's just say that coffee grinders, which are structurally part of coffee machines, are more complex. For example, setting the grind size is allowed. The basis of the mechanism is a shredder. Do-it-yourself grinder repair is not difficult.

There are two types of kitchen coffee grinders:

Knife. Crescent blade.
Millstones. Steel or ceramic mill.

The former are eminently like a blender. Those who have read the Vitamix reviews are aware: the device turns a kilogram of ice into ice, spending 5 seconds. A similar Korean blender rolls the stones for egg-shaped mementos plus dust. Unsurprisingly, the kitchen coffee grinder is not much different from the proven bar-based beverage preparation devices:

There is no specific bowl shape where ice, fruits, various cocktail liquids are mixed. Instead, a small, tightly closed box where the grains are placed is then continued by the engine, which turns the grains into dust.
The lion's share of the body is occupied by the motor. If the blender looks like a bowl on a stand, in the case of a kitchen coffee grinder, the engine compartment takes up 80% of the volume. It is possible to assemble devices that work for a long period of time without rest and are cheaper.

Video (click to play).

The disadvantage of kitchen knife grinders is the lack of an option to adjust the degree of grinding. There is little trouble for citizens, a true connoisseur in the course: an important indicator is indicated. The beans must be fresh (less than two weeks after roasting), properly cooked. Some models of coffee makers are powerless to overcome the dust. The particles will go into the cup, little pleasant. There will be a chance to tell fortunes by exploring the thick.

It is clear that the knife is unable to cover the volume, there is space on the periphery, under the blades. The crescent surfaces are specially made according to the propeller principle. When the lid is tightly closed, rapid turns create a movement of air that raises dust and throws up grains. This is how a kitchen coffee grinder works, a blender is ill-suited for this task as dust starts to fill the kitchen.

The capacity of the device for preparing drinks is large, obviously assuming the presence of a myriad of grains for grinding. On the contrary, the kitchen coffee grinder is equipped with a modest bowl, which can fit the required 20 grams. Obviously, kitchen knife grinders are not sophisticated automation. The process looks like this:

put the grains in the bowl;
the cover is closed, the motor turns on;
fixed time kitchen coffee grinder does the job;
the finished powder is poured where necessary.

It is impossible to grind a significant amount at a time. Kitchen grinders work to pass any number of beans through tapered knives. The degree of grinding is regulated by the distance between the cutting edges using special screws. If for manual coffee grinders powder is poured into the pan, for electric grinders a hole is made in the side of the working bowl, where the finished coffee is pushed out. Behind the aisle, the next section of the kitchen coffee grinder begins, which has a rotating crosspiece that pours the drink into a collecting container. The engine is one. The crosspiece rotates much slower than the knives, driven by the gearbox.A distinctive feature of coffee grinders is the need to periodically replace the knives. The "blender" is sharpened, the tapered teeth are much more difficult to adjust with the machine, the precision of the surface fitting is required, excluding mutual interference, giving the exposed coarseness of coffee powder.

In the case of cones, there is a great charm: the knives are screwed in by three bolts each, the heads go into the working gap. With a loose tightening, we get the opportunity to make iron powder mixed with coffee. Surely both knives break, there is a chance: the electric motor will not withstand the load, it will burn out from overheating. Let's see what the developers have hidden inside a typical coffee grinder.

We examined how the device works, now we will delve into the device of the coffee grinder. There is one engine inside, usually of the collector type. The devices will operate on direct current, the frequency does not matter. The battle for the championship is won by the amplitude of the supply voltage. The reason for using brushed motors. There are no transformers or active elements inside. The coffee grinder is represented by an engine, supplemented by two devices:

Protection against switching on when the cover is open.
Power button.

Two contactors that carry electrical current directly. Inside are a pair of capacitors to filter out interference. When starting, the engine generates voltage drops, it is necessary to smooth out. Do-it-yourself coffee grinder repair comes down to ringing two contactors, evaluating the performance of the engine. Considered the electrical part. They said about the mechanics: sometimes you have to change the knives. Where to get new ones, decide for yourself. Sleeve bearings are used in coffee grinders and should be lubricated regularly. The shaft is jammed - not the fact that the motor has broken. Despite the dust cover, the coffee powder gets inside, clogging up in the cracks. Disassemble the grinder, clean the connections, lubricate the rubbing surfaces. Sewing machine oil will do.

As for the motor, due to the small size requirements, cheap grinders use the motor type mentioned in other reviews. The stator is a typical core inductor. The field of the magnetic circuit extends to the rotor, which consists of a set of turns. The section is called separately if necessary. Graphite brushes, feel free to sharpen, adjust to the place, performance will not suffer from this. The hold-down springs are adjusted accordingly.

When repairing a collector motor, ring each section in turn. You don't need to disassemble anything for this. We do not recommend starting the process from the side of the plug just because there may be capacitors inside. Remove the case, find the contacts of the brushes, follow the further process with respect to them. For this, the first section is called. Operation is in order - the shaft is turned by hand to the next section. Let's make a full circle, making sure everything is in order. The stator coil is easy to rewind, the rotor is more difficult. We recommend changing the engine by purchasing a suitable one from the market. If there are no options to buy additional equipment, try to remove the burnt out rotor winding and install a new one. In this case, it will be difficult to fix the grinder yourself.

Wrap the stator coil on a special device. Two pairs of racks are located opposite each other on a long board. The tandem contains a horizontal axis that rotates freely. Coils are put on it: one with a supply of wire, the other for winding. First, they find the place of damage to the old choke. If located at the beginning or at the end, you can wind the new spool with the same wire. A dozen or two turns of the weather will not do. Otherwise, the length of the wire is measured, a similar one with varnish insulation is bought, after which the coil is wound neatly, turn to turn, in the image and likeness of the old one. It is allowed to do the operation manually or use a drive from a screwdriver or drill.Create gearboxes or belt drives if necessary, this is important. The main thing is to hold the wire with your finger, creating the minimum necessary interference.

Determine the thickness of the wire with a caliper, the market will tell you what type of wire to take. After winding the coil, measure the resistance, ideally it should be equivalent. Recognizing the old value, measure the resistance of the removed piece, add it up. An inductance meter does not hurt, henries determine the efficiency of the magnetic field transmission.

We have listed the main types of malfunctions, the contacts are periodically cleaned, but the frequency of use is not so high, therefore, there are quite few problems in this segment. Capacitors are damaged. If the collector motor is running, the contacts are working, the problem is in the capacitors. You can replace the motor with an asynchronous one, in this case, connect it to the phase correctly. If there are no impellers on the motor shaft to cool the windings, install it yourself.

Coffee grinders are functional devices that require regular maintenance and care for long-term operation. With the help of tools, the grinder can be repaired by yourself. It is necessary to take into account the specifics of the device of mechanical and electrical devices. Coffee grinders can be damaged from moisture, broken power contacts, cable deformation, etc.

A coffee grinder is a device for grinding beans. The system can be manual (mechanical) or electrical. The principle of operation of the device is based on the rotation of the millstones; the distance between the elements is adjusted with a screw.

The cylindrical shape of the structure was formed at the beginning of the 16th century. and has survived to our time almost unchanged. Electric coffee grinders are also produced, combined with other household appliances.

Repair of simple devices can be done independently.

Classic Turkish coffee grinders were created in the 2nd half of the 17th century. The devices are cylindrical; foldable handle fits in the case. In addition to the main function (rotation of the device), the handle is a wrench, with which the size of the grinding of the grains is adjusted and the mechanism is disassembled.

European hand-held devices are designed in the shape of a cube and are complemented by a pull-out container for coffee powder. The coffee grinder option is more cumbersome due to the presence of a wooden box.

To adjust the fine grinding, the devices are attached to walls, pedestals, or equipped with a clamp for installation on a table.

The standard design includes 2 conical burrs. The distance between the elements is changed with a screw. The size of the grind can be adjusted by the twist density of the element. When turning the handle, the grains fall into the funnel between the knives (screwed and rotating).

Electric coffee grinders are suitable for home conditions, but are most common in the professional field (coffee shops, restaurants). Millstones can be flat or conical.

In some machines, millstones replace knives. The devices operate on the principle of a blender. The coffee beans in the appliance are cut with a rapidly rotating blade.

The electric coffee grinder is divided into 2 compartments. One block houses the engine, the other compartment is reserved for a bowl for grains with a knife-attachment at the bottom. The basis of the mechanism is a shredder. The device includes a container for grains, a hopper for ground raw materials, a portion counter, dispenser levers, mechanisms for setting the grinding mode, a press and a switch.

Electric coffee grinder device

Most coffee grinders have a simple disassembly algorithm. Knife and millstone mills are disassembled according to the general scheme. Work begins with the body. Self-tapping screws are unscrewed in the lower plane of the device. Access to the elements - open or hidden by the legs of the coffee grinder.

Then the conical mill knives are unscrewed, which are attached to the drive shaft by 3-4 screws or bolts.When reassembling, it is necessary to monitor the accuracy of the connection of the surfaces of the elements.

Certain types of devices are fastened with latches. During the disassembly of the Soviet ZMM coffee grinder, the lower block of the case is removed using probes.

Before pulling out the motor, it is necessary to dismantle the blades in accordance with the model of the device.

The threaded method of connecting knives, which functions on the principle of self-tightening, is popular in household coffee grinders. To dismantle the knives, it is required to place the slot of the screwdriver in the shaft opening. Then the knife block turns counterclockwise or clockwise (according to the type of thread). Work must be carried out carefully.

The area of the mountings can become clogged, therefore the use of lubricants is recommended for easy dismantling.

The procedure for further work varies depending on the model of the device. Standard grinders require you to unscrew the plastic locking nut in the grinding bowl. The anti-dust felt gasket, which comes complete with the fixing nut, is left for assembling the device.
The steel washer is removed from the axle and the blocker plate is removed.

The following tools are useful for disassembling the device:

screwdrivers with different attachments;
pliers or pliers;
tweezers;
scissors;
multimeter;
soldering iron;
solder;
heat-shrink tubing.

For some models, hot melt glue, a drill, thin probes are required.

It is recommended to study the instructions for the product from the supplier and the fastening diagram of the device's elements.

To disassemble the Bosch mkm-6003 device, first remove the impeller; work is performed clockwise. Then the bonding wires are loosened, the motor is taken out and cleaned with a soft brush. It is not recommended to independently disassemble the engine of this brand of coffee grinder - you must contact the technical inspection service.

Soviet manufacturers have developed easy-to-use models of coffee grinders that can be easily disassembled if necessary. The knife is removed with a screwdriver. The screwdriver is inserted into the slot in the base of the device. Then the part is unscrewed in a smooth counterclockwise motion.

Using pliers, the plastic nut is unscrewed, the cup holder and the main container are removed. It is necessary to remove the power button from the axis. Then the fastening screws are unscrewed, the electrical wires are removed and the engine is removed.

Common breakdowns include damage to a circuit breaker, reduced operating speed, or stalling of the electric motor. The cable may be deformed during operation. The knives become dull, slow down the grinding speed and need to be replaced. Therefore, spare parts for coffee grinders are regularly updated.

In rotary devices, the crushing blade must be replaced. In devices with millstones, they regularly sharpen or put new millstones. Many devices can be repaired by hand.

Defective cable is visible during operation. If the wire is close to the body, you will need to unscrew the cover and check the health of the element. The broken cable is replaced.

The lock may not work in the grinder. Breakage occurs after clogging of the pressure device on the surface of the cover. If there is no pressure on the inner plate, check the lock using a thin screwdriver. If there is contact in the device, you need to disassemble the grinder, clean it from dirt and repair the wires leading to the blocker.

The unit may not start if the internal cable is cut. For repairs, you will need a soldering iron with which you can fix a loose contact. The design is disassembled beforehand.

The device does not start due to a breakdown of the electric motor. It is recommended to consult with specialists about the need for repair. In some cases, a complete replacement of the mechanism or purchase of another coffee grinder is suitable.

During long-term use, the knife rotates unevenly. It is necessary to diagnose the operation of the mechanism, because adjustment or repair will be needed.

With an increase in the volume of grains for grinding, the speed of rotation of the cutting elements may decrease. Dry lubrication of the bearings is a probable cause. The device must be disassembled and lubricated. The reasons for the breakdown are also the burnout of the winding or the failure of the electric motor.

Knives are among the main elements of the grinding apparatus, because affect the speed and quality of grinding grains. If the cutting surface of the mechanism is damaged, the processing of coffee beans will be of poor quality.

To determine the cause of the breakdown, it is recommended to diagnose it by the service center specialists. In the event of a factory defect, the cutting elements of the device can be changed. Knives that are dull during frequent use are sharpened or replaced with new ones.

A burning odor and the hammering sound of the grinder motor indicate oxidation and contamination of the slide bushings and bearings. Breakdowns are a common problem with electric coffee grinders. Disassembly of the system and diagnostics of the sliding course of elements will be required. If necessary, parts of the device are lubricated.

Rust can be cleaned with special anti-corrosion compounds. Preliminarily, metal elements are processed with sheets of fine-grain sandpaper. The sanding is done carefully because it is undesirable to change the clearance in the bushing, which will lead to malfunctions of the device.

If you smell burning, you should try to clean the bearings and sleeve bushings.

For long-term use, it is necessary to follow the rules of operation and maintenance of the device. After grinding the beans and before cleaning, the device must be disconnected from the power supply.

It is important to ensure that the engine does not overheat. Therefore, to prepare a large batch of powder from grains, it is necessary to regularly turn off the device for a short time. According to the requirements of operation, the device should not function for more than 1-2 minutes.

The machine is only used for grinding coffee beans. It is not recommended to process sugar, peppers, cereals in the device, because this will deform the knives. In addition, odors from products are difficult to eliminate later.

During operation, it is important to observe the volume of grains specified in the instructions. It is not recommended to pour a large amount of coffee into the container, because this will cause the engine to overheat and burn out. The electric coffee grinder must not be immersed in water.

It is required to clean the device after each grinding of beans. Contamination is removed with paper towels, cloth, thin brushes. Wet cleaning of the hoppers for coffee is also necessary.

The maintenance procedures include the lubrication of the iron parts of the device. It is recommended to observe the operating modes of the model and regularly adjust the mechanism.

It is not recommended to use synthetic detergents for cleaning internal surfaces, since their aroma will spoil the taste of the beans. For cleaning, do not use abrasive powders and hard brushes, because means will damage the device.

If you are not an expert, how to fix a coffee grinder? Instruction in pictures.

2. The grinder does not work at all.

It's cheaper to buy a new grinder.

3. The grinder turns slowly.
growls suspiciously suspiciously, a burning smell is felt from within.

Modern coffee grinders are without a doubt reliable and efficient, but they are designed for specific tasks. For example, the grinder may need repairs if sugar is ground in it instead of coffee beans. Other models, especially those made by Bork and Bosch, suffer from moisture penetration into the motor shaft area. But in any case, if the engine has not burned out, you can fix the device yourself.

Most coffee grinders have a fairly transparent disassembly algorithm. There are two types of devices:

knife coffee grinders;
millstone mills.

The latter have a separate algorithm for disassembling the grinding mechanism. The answer to the question of how to completely disassemble a burr-type coffee grinder depends on from a specific model devices. The general scheme is the same.The conical mill knives are attached to the drive shaft with three to four bolts. Unscrewing them is easy. However, when reassembling, care must be taken to ensure that the heads are fully seated in the seats. If you assemble the grinder without tightening the bolts, you can burn the grinder, or you can constantly find fine metal dust in the grind due to the protruding heads of the fasteners protruding into the zone of movement of the grinding mechanism.

Coffee grinder cases are easy to disassemble. It is required to unscrew a couple of self-tapping screws, which are often located on the lower plane, the bottom of the car. Access to them can be either open or protected by the device's legs.

A separate group of coffee grinders keeps on latches... For example, the Bosch MKM 6000 models, the Soviet ZMM apparatus, the EKMU 50 and EKMZ 125 millstones. Here, the lower part of the case is removed using thin probes or screwdrivers with which the latches are bent.

Pulling out the motor to inspect the condition of the bearings and shaft requires dismantle knives... They are filmed in different ways. The most common type of connection is threaded. In this case, the principle of self-tightening is used. If the knife moves clockwise, then a left-hand thread is cut at the connection. If counterclockwise - right. To dismantle the knife, you need to place the slot of the screwdriver in the corresponding slot in the shaft, and then turn the knife block clockwise or counterclockwise, depending on the thread.

Care must be taken when dismantling the knife. The indentation on the shaft is shallow, the metal is soft, so the screwdriver must be placed tightly, pressed down and when unscrewing the knife, apply force gradually.

Over time, the attachment area becomes clogged with the remnants of grindings, gets caught in oxides. Therefore, it is recommended to apply grease WD-40to remove dirt and easily unscrew the knife block. In the case when the clamping nut has a tapered thread and is made of bronze, you can slightly heat the connection area using a soldering iron.Further actions depend from the coffee grinder model... It is necessary to disassemble the device carefully, following the limiters, removing the structural elements from the grooves. More often than not, after removing the knife block, you need to do very little:

Unscrew the plastic fixing nut that secures the grinding bowl. The felt anti-dust pad attached to the fixing nut must not be lost.

Remove the steel axle washer.

Remove the bollard plate by gently pushing it down and out of the restrictive grooves in the body.

Saeco Grinder Detail Example

To repair the engine or determine its performance, you need a multimeter and knowledge of where to measure the resistance of the windings. Therefore, we will only touch on the relative minor problemsthat can be eliminated even with minimal tool handling skills.

A broken power cable is visible to the naked eye. But if the bend is close to the case, you can detect a breakdown simply by moving the wire. If the device begins to show signs of life, it means that you will have to change the cable.

Lock failure occurs due to clogged pressure mechanism (is in line with the cover groove) or the inner plate is not pressed.Checking the lock is simple - press on the protruding plastic element with a thin screwdriver. If, at a certain position, the coffee grinder comes to life, you need to disassemble it and remove the dirt.

There may be several reasons: from a cable break inside (to eliminate such a problem, you will need skills in working with a soldering iron) to engine failure. In this case, verification will require special knowledge. In this case, repairs are economically ineffective, rewinding or buying a new engine is required, it is often easier and cheaper to buy a new grinder.

One of the reasons is partial failure of the motor, burnout of one of the windings. Repairs can be a problem. Diagnostics, rewinding or expensive replacement will be required.

The most common cause is contamination and oxidation of bearings or sleeve bushings. This problem is very often observed in Bosch 6000 series coffee grinders. To eliminate contamination, you need to carefully disassemble the device, check the ease of sliding of all blocks, lubricate the bearings. The Bosch 6000 models do the following:

the sliding sleeve is removed from the shaft (upper part);
the shaft is treated with alcohol;
if there are obvious signs of corrosion, it is removed using special tools or WD 40.

The shaft can be machined sandpaper-zero, you need to act carefully. The procedure shown in the following video is not a commonly used one. With diligence and constant repetition of this kind of maintenance, it is possible to change the gap in the sliding sleeve, which will lead to all kinds of problems.

The coffee grinder can be repaired periodically. Maintenance procedures include lubrication and decontamination. To avoid accidents, do not operate the grinder in modes not recommended by the manufacturer. For example, grind sugar into powder, grind herbal spices, process large masses of grinding. Each technique has its own operating rules and if you do not violate them, the device will work for a long time and trouble-free.Modern household appliances are not durable. And if you still use the device not for its intended purpose, then the rate of its failure increases significantly. This can happen with a coffee grinder if sugar and other harder foods are ground instead of coffee beans. But, regardless of whether the device broke down due to improper operation or for other objective reasons, you should not rush to contact the service center. Most likely, it is quite possible to repair the coffee grinder with your own hands.Today's electric coffee grinders are available in two types: millstones and percussion grinders. The lion's share space in the case the device is occupied by an electric motor - up to 80%. The rest of the area is dedicated to coffee beans. For instance, at millstones the grinder is divided into three sections. The first is filled with a portion of the raw material for processing. In the second, grinding takes place directly. And in the third, finished products are assembled. Image - Do-it-yourself coffee grinder repair Polaris

V impact type designs installed knives. It is they who grind the grains into powder at a high rotation speed. Sometimes this mechanism is called rotary. And it only has one hopper that holds roasted coffee beans. Processing takes place in it. And the ground raw materials are simply poured into another container. In terms of its structure, such a coffee grinder is very similar to a blender.

Important! All devices are equipped with a motor lock when the lid is open and overheating protection. In many models, an additional pulse mode has been added, which with short engine stops helps when crushing harder products. For example, when you need to make powder from sugar.

Rotary coffee grinders often set a timer... It is needed to regulate the degree of grinding. The longer the process, the smaller the product yield. In millstone structures, this role is played by grinding depth adjuster... To do this, increase or decrease the gap between the millstones. Unequal grinding fractions are needed to prepare a drink according to different recipes.

Advice! To brew coffee in cezve, you need to grind the beans into dust. And for brewing espresso, a coarser grind is needed.

It is not difficult to disassemble the device if you know the circuit diagram of the device. The design of all grinders is almost the same, but the assembly is different for different brands. And the famous Bosch company has two models with different disassembly methods.

It is easy to find people who still successfully use Soviet household appliances. Produced in a country that has not existed for a long time, coffee grinders are not inferior in productivity to their modern counterparts. They will open a list of instructions for the correct disassembly of such devices.

Made conscientiously back in Soviet times coffee grinder ZMM you have to disassemble, if not for repair, then at least for cleaning and maintenance work. The sequence of actions is as follows.

Free the knife. To do this, find a slot on the bottom of the case, insert a screwdriver into it and unscrew it counterclockwise.
Using a spanner wrench or pliers, unscrew the plastic nut by half a turn (left or right), which is located immediately under the knife.
Remove the plastic cup holder with the glass.
Remove the metal washer from the retaining axle.
To remove the plate, you must simultaneously press on it together with the blocker and turn it counterclockwise until it comes out of the grooves.
Bend back the retaining spring and release the switch.
Remove the dirt protection washer from the axle.
Move the ring at the bottom of the housing and unscrew the screws securing the electrical cable.
Take out the engine.

Important! When removing the knife, there is a risk of ripping off the slot. After this, further disassembly will be impossible. To prevent this from happening, you must first spray on it from a can of WD-40 and wait a few seconds. This will make it much easier to unscrew.

Completely similar sequence diagram when disassembling another Soviet model - ECMU 50. But modern electric coffee grinder "MIKMA»ECMU IP-30 from a Moscow manufacturer (a subsidiary version of the Soviet prototype), the algorithm is the same up to the fifth point inclusive. Then you need to do the following:

do not remove the bar, but carefully lift and move to the side;

before disconnecting the conductor, you need to push it out of the button body and remove it to the right;

take out the electric motor;

remove the oil seal from the engine shaft;

free the shields from rubber shock absorbers;

remove the spring from the groove inside the device to remove the button;

unscrew the two screws hidden under the rubber ring on the bottom to disconnect the power cord from the case.

Straume 3 is another coffee grinder made in Riga during Soviet times. And here's how she understands you can watch the video:

Basically, all coffee grinders are easy to disassemble.Usually it is enough to unscrew 2-3 screws from the bottom of the case. Sometimes you have to tinker with the latches. But there are also secrets, like a model Bork j700: to get to the printed circuit board, you need to remove the grind switch knob, which is attached instead of the nut with a washer (it is this that needs to be unscrewed). The original opening is also characteristic of the coffee grinder Elmaz... The nuance lies in the fact that you first need to turn the bottom with your palm, and then remove it from the hooks in the body.

Advice! Separately, we can say for the model Vitek 1540... It is not recommended to disassemble it at home. This can only be done by qualified service technicians.

The following will describe methods for repairing coffee grinders that do not require in-depth knowledge. Namely:

the device does not turn on;
knives spin unevenly;
malfunctions in the motor;
break in the power cord;
other typical simple breakdowns.

When the device shows no signs of life, then first of all you should look for a violation of contacts and wire breaks. If the inspection did not reveal a problem, then the reason lies in the electric motor, which can only be eliminated in the workshop, since special knowledge is needed.

Important! When the knives are spinning with sticking, then there is an obvious fault of the burned-out motor winding. At home, for a person ignorant of such matters, rewinding the winding is simply not realistic.

But if the motor works with effort and there is a burning smell, you can try to do without a specialist. Most likely this is due to contamination of bearings or sleeve bushings. To fix the problem, you need to free the shaft and wipe it with alcohol. In case of obvious corrosion, you can treat it with WD-40 or neatly with a sandpaper. For interruptions in engine operation, brushes may be responsible. In this case, cleaning or their complete replacement is required. You can wipe the entire manifold with alcohol if dirt has accumulated on it.

Break points and breaks at the power cord immediately catch the eye. If it is not possible to replace it with a new one, then the wires at the break point should be stripped, re-soldered and re-insulated. There are also cases when, due to contamination of the push mechanism, the blocking fails. This issue can be easily solved by disassembling and cleaning the non-working unit.

Advice! Some grinders (notably the Delonghi KG 79) have a weak link in the form of a capacitor on the electrical board. Over time, it swells and needs to be replaced with a new one.

In order for the coffee grinder to work as long as possible, you need to follow simple rules of operation and prevention..

Do not leave ground coffee in the device for a long time.
After every grinding need to wipe the inner bowl and knives with a damp cloth.
Do not immerse the device in water when washing, it is better to limit yourself to a wet rubdown.
Machines with plastic enclosures can overheat and fail after long continuous operation. Such failures are frequent with the brands Moulinex and Saturn. If take short breaks in grinding every 20 seconds, the service life of the grinder can be increased.
Need to try to avoid chopping other foods... There is a blender for this.
Should timely change dull knives and millstones... The latter must be replaced after grinding 300 kg of grains, and the former much more often.

Fulfilling simple rules for the care and operation of the device, regularly carrying out preventive work and timely performing minor repairs, you can extend the life of your favorite coffee grinder, which will delight you with many years of faithful service.

The first mentions of coffee in Russia are found in documents from the middle of the 17th century, during the reign of Tsar Alexei Mikhailovich. Emperors Peter I and Catherine the Great were coffee fans. The quality of an invigorating drink is very much dependent on the grinding: fine dust will increase the bitterness, large particles will make the coffee watery. What are the types of coffee grinders, how to grind beans correctly? What are the malfunctions of coffee grinders, how to carry out a simple repair of a coffee grinder with your own hands?The birth of the electric coffee grinder is marked in history on April 3, 1829. On this day, James Carrington received a patent for his electromechanical invention. Up to this point, coffee was ground manually, using a manual coffee grinder. Its device was a reduced copy of a mill, and coffee beans were ground by grinding them between two millstones.With the use of an electric motor, two designs of coffee grinders appeared. In one, all the same traditional millstones are used, and this type is called a millstone. In another, metal knives rotating at high speed took on the role of the grinder and therefore the coffee grinder is called rotary.The millstone type of a coffee grinder consists of three sections. Whole grains are poured into one. In the second, they are ground and poured into the third section on their own in the form of a ready-to-use powder.