What is dynamic balancing?

Dynamic balancing involves bringing the center of gravity of the rotating mass in line with the axis of rotation in order to reduce the centrifugal force and the resulting pair of forces, which are the main causes of vibrations.

What information do I need to get a balancing machine?

Basically, you need 5 pieces of information before you buy a balancing machine

1. rotor type (type of part you want to balance).

2. part weight (minimum and maximum weight if you are balancing more than one type of part)

3. correction method (drilling, grinding, milling, mass centering, welding or punching or weight addition).

4. number of parts to be balanced per hour

5. balance tolerance (single plane or two planes)

If you do not have this information or are not sure how to obtain this information, please call us. The experts at METAS MBS BALANS SANAYI will be happy to help you.

How do I know which MBS balancing machine model (vertical, horizontal, cradle, drive shaft, static, dynamic) is best for my application?

The best machine is determined by the available budget, the type of part, the correction method, the balancing tolerance (one plane or two planes) and the number of parts that need to be balanced per hour. The experts at MBS METAS BALANS use 20 years of experience to determine the best machine for your application.

How do we determine the size of the machine?

The size of the machine should be optimal for the range of work you need to do. For mass-produced parts, it is advisable to opt for highly equipped machines with a built-in correction device. If you want to machine a range of components, choose the machine for the maximum range of components you want to machine. A machine in the 1-50 range is the best solution. This means that a machine can handle 1 kg to 50 kg or 100 kg to 5000 kg or a similar range. Such a machine will do work in the medium range in grade G 2.5 and in the 50 range in grade G1 and in the 1 range in grade G 6.3 or G 10. A machine cannot balance the whole weight range in the whole speed range to the best balancing quality level.

Any other larger range, say 1-100, is a compromise and may not be worth the time of man and machine. Likewise, the performance of the machine is determined by the inertia of the rotors (as with motor rotors), by the energy used in balancing (as with fans), or by the speed at which you want to stop and start the components. Remember, if you want to double the balancing speed of a fan, you need three times more power. You also need to check the physical size that needs to fit on the machine to allow for safe travel and balancing.

What are the criteria for selecting end-driven, belt-driven, self-driven vertical balancing machines?

With a dynamic balancing requirement, the accuracy of the component and the simplicity of balancing determine the most technically economical solution when selecting the balancing machine and drives. Mass-produced components with a disk shape and small size are always balanced on a vertical machine with built-in correction equipment. High-precision work requiring a high degree of balancing, such as turbines and turbochargers, are balanced on belt-driven machines. Components such as fans and heavy rotors, which require a lot of power to accelerate and decelerate, are driven via cardan shafts on a balancing machine. High-speed components such as automotive turbochargers, where the error caused by drive elements is unacceptable, are balanced by using their own real simulated energy sources such as compressed air. The advantage of the belt drive arrangement over a universal shaft drive machine is that time is saved in attaching the drivers to the component and errors due to the drivers on the residual unbalance are avoided.

How do I know which MBS balancing machine model (vertical, horizontal, cradle, drive shaft, static, dynamic) is best for my application?

The best machine is determined by the available budget, the type of part, the correction method, the balancing tolerance (one plane or two planes) and the number of parts that need to be balanced per hour. The experts at MBS METAS BALANS use 20 years of experience to determine the best machine for your application.

How do we determine the size of the machine?

The size of the machine should be optimal for the range of work you need to do. For mass-produced parts, it is advisable to opt for highly equipped machines with a built-in correction device. If you want to machine a range of components, choose the machine for the maximum range of components you want to machine. A machine in the 1-50 range is the best solution. This means that a machine can handle 1 kg to 50 kg or 100 kg to 5000 kg or a similar range. Such a machine will do work in the medium range in grade G 2.5 and in the 50 range in grade G1 and in the 1 range in grade G 6.3 or G 10. A machine cannot balance the whole weight range in the whole speed range to the best balancing quality level.

Any other larger range, say 1-100, is a compromise and may not be worth the time of man and machine. Likewise, the performance of the machine is determined by the inertia of the rotors (as with motor rotors), by the energy used in balancing (as with fans), or by the speed at which you want to stop and start the components. Remember, if you want to double the balancing speed of a fan, you need three times more power. You also need to check the physical size that needs to fit on the machine to allow for safe travel and balancing.

What are the criteria for selecting end-driven, belt-driven, self-driven vertical balancing machines?

With a dynamic balancing requirement, the accuracy of the component and the simplicity of balancing determine the most technically economical solution when selecting the balancing machine and drives. Mass-produced components with a disk shape and small size are always balanced on a vertical machine with built-in correction equipment. High-precision work requiring a high degree of balancing, such as turbines and turbochargers, are balanced on belt-driven machines. Components such as fans and heavy rotors, which require a lot of power to accelerate and decelerate, are driven via cardan shafts on a balancing machine. High-speed components such as automotive turbochargers, where the error caused by drive elements is unacceptable, are balanced by using their own real simulated energy sources such as compressed air. The advantage of the belt drive arrangement over a universal shaft drive machine is that time is saved in attaching the drivers to the component and errors due to the drivers on the residual unbalance are avoided.

With dynamic balancing machines, do we need to run the component being balanced at operating speed/operating speed?

We use a dynamic balancing machine to measure the unbalance in the unit gram-millimeter. The quality and sensitivity of the balancing machine determines the speed at which you can balance a component. With modern dynamic hard bearing balancing machines, engineers are able to measure imbalance at relatively low speeds. The imbalance corrections performed apply to most rigid rotor operating speed requirements. For information on determining allowable residual unbalance for rigid rotors, see ISO 1940 standards.

What are rigid rotors?

The rotors that do not change shape as the speed increases or do not operate at the resonant frequency are classified as rigid rotors.

What are flexible rotors?

Flexible rotors are rotors that operate close to their resonance frequency. This engine running results in very little deformation of the rotor. Flexible rotors need to be balanced at higher speeds and also near their operating speed. In order to achieve the desired results, on-site balancing is often required.

What are soft bearing dynamic balancing machines and hard bearing dynamic balancing machines?

When balancing machines were introduced a few decades ago, the cradle on which the rollers were supported had to be moved to measure the vibrations caused by imbalance. With the advent of technology and the introduction of quartz transducers to measure force, it is no longer necessary for the cradles to swing to measure vibration. The machines that still had oscillating cradles and electrodynamic sensors for measuring vibrations were classified as soft-bearing machines.

The machines that have rigid cradles without any movement and measure the force using piezo or other sensors are classified as hard bearing dynamic balancing machines. The basic design philosophy of hard bearing dynamic balancers is force measurement, and the advancement of computational mathematics using microprocessors has enabled the introduction of balancers whose calibrations apply to the full range of speeds, weights and quality requirements.

The algorithm used enables permanent calibration and numerous other functions for everyday use and maximum reliability.

Why is measuring the balancing speed of the component in a balancing machine so important?

The balancing machine is an industrial machine. The machine is in a factory environment along the process line. In an industrial environment, there are many types of industrial noise: electrical, mechanical and magnetic. In addition, this balancing machine has drive elements such as motors, pulleys and belts that also rotate with the component. The component is mounted on rollers, whereby the rollers rotate with the component. The transducers capture signals from all rotating elements. The electronics of the balancing machine need a reference signal to extract the unbalance signal of the component to be balanced. The velocity signal of the component to be balanced serves as a reference for signal extraction. In older stroboscope machines it can be observed that the unbalance point shifts/oscillates over a wide angle during balancing. In modern machines with a phase-locked loop, the angular displacement is reduced to an insignificant level.

Why do we need multi-speed balancing machines?

Multi-speed balancing machines are typically large machines and machines that handle a variety of tasks. If the component is a mass-produced component with predictable imbalance values, machines can be set at a speed to balance the components faster and within tolerance. However, for heavy components, the degree of unbalance may not be known initially. For safety reasons, it can be dangerous to run the component directly at the required balancing speed. Therefore, heavy components are driven at lower speeds and initial balancing is performed. Further balancing is carried out at higher speeds until the desired accuracy is achieved.

Do we have to put dynamic balancing machines on a foundation?

A balancing machine is an industrial machine used to measure vibrations and calculate residual unbalance. Modern hard bearing balancing machines measure force. For correct measurement of the unbalance amount and phase angle, it is important that the machine does not vibrate or wobble. For more accurate results, it is necessary to mount the machines firmly on an industrial floor.

What is the unbalance reduction ratio?

The instrumentation of the balancing machine indicates the degree of imbalance in the component being balanced. A good machine can display a value and if a correction is made that corresponds to the displayed value, the next resulting residual unbalance should be less than 90-95% of the first displayed value. For example, if the machine displayed 50 grams at a certain point on the first run. If a 50 gram weight is attached at this point and a residual unbalance value is measured and the machine shows a value of 5 grams and less, the machine is said to have an unbalance reduction rate of approximately 90%. For more details, see ISO standards 1940, 2953, etc.

What are the units of unbalance?

The unbalance units are the product (multiplication) of the permissible unbalance weight at the correction radius. For example :

X grams of unbalance at Y millimeter radius is defined as XY mmg of unbalance. Based on practice the units can be in:

meters grams

ounces inches

Gram inches

millimeter-gram

millimeter milligram

Or the product of a linear distance unit and a weight unit. The relationship between all entities is straightforward and can be transferred to simplify operations.

What is Layer Separation, Cross Effect and Influence?

With dynamic two-level balancing machines, the results are displayed in two correction levels. When correction is made on one level, the effect of unbalance correction on the second level is defined as level separation or cross effect or influence.

Normally the level spacing is well below 3%. In computer-assisted dynamic balancing machines with hard bearings, plane separation is achieved mathematically. Therefore, users tend to achieve better plane separations on hard bearing computer controlled dynamic balancing machines. This is not the case with soft bearing machines, where unbalance signals are electronically mixed and modulated to display the results.

Do different balancing speeds mean different unbalance values?

Unbalance is a vector and a physical quantity that relates to the geometry of the component to be balanced. It remains the same at all speeds as long as the component does not deform and remains rigid. On good, hard-bearing dynamic balancing machines, the unbalance value and angle remain the same within allowable deviations when checked at different balancing speeds. Because electronics operate at low voltages (e.g. +/- 15V), older devices have switches and markers to compensate for fluctuations in results. A deviation of +/- 5% of the specified values in different speed ranges is acceptable and the machine can be classified as a very good machine.

We added the amount of unbalance specified by the machine. Nevertheless, the machine has considerable imbalance and the angle has also shifted. What is the problem?

Unbalance is a vector. To compensate for this, you have to make the compensation exactly at that point. If you have balanced the right amount, but at a different point (angle), you will get the resultant of the residual unbalance and its position.

The above three numbers indicate that the residual unbalance is given for the same unbalance value and the same compensation values. Essentially, both the extent of the unbalance and the location of the unbalance determine the effect of the balancing.

We have an important task and want to make sure the balance is right before we move forward. We don't know calibration or any complex theory. What do we do?

In this situation, the user should be aware that all digital electronics operate at +/- 5V. The interpretation of the results is crucial. A simple method is to match on half of the accepted values.

Assume that you balance the component with a tolerance of 50 mmg to a residual unbalance of 25 mmg indicated by the machine.

Now change the reference position without disturbing the assembly and the drive. This can be done by indexing the PTO shaft 180 degrees (any angle) on final drive machines or by moving the reference sticker 180 degrees (any angle) on belt drive machines. Now measure the residual unbalance amount of the component. If the displayed residual unbalance is within 10% of the first value, you can be sure that all errors such as drive errors, drift in the electronics, etc. have been taken into account and the component is well within the permitted residual unbalance.

We balanced the component well within tolerance. Our vibration levels are not satisfactory even during assembly. What is the reason?

Dynamic balancing involves bringing the center of gravity of the rotating mass in line with the axis of rotation to reduce centrifugal force and the resulting force couple, which are the main causes of vibration. If you used an adapter with a 20 micron bore clearance and balanced the assembly to G 6.3 grade, your assembly may actually have a G 15 or G 20 balance quality once assembled. So during assembly you will not achieve the quality of balancing that appears to have been achieved on the balancing machine. The quality of the bearings also plays a role. Both the balancing machine and the tools are important for good results.

Howcan the permissible residual unbalance or balancing tolerance be determined for a specific component?

The allowable residual unbalance is the requirement based on the design criteria and application of the specific component. The designer of the component or the end user of the component is the best judge. If such information is not available, the user can rely on ISO 2953. The user can also use the included software utility to calculate residual unbalance.

What is the best method for unbalance compensation?

The imbalance is initially corrected constructively and then either by adding or removing weight. The design requirements of the component are the best guide for performing compensation. The weight can be removed for balancing by drilling, milling, grinding, etc. if the amount of unbalance compensation is less and the design allows for it. If the imbalance is severe, the balancing weight is welded or screwed to the component, as eliminating severe imbalance can weaken the component and render it unusable. Also for safety reasons, it may not be advisable to remove too much material.

In how many places do we have to make compensation on our workpiece?

A dynamic balancing operation requires at least two planes and two locations for proper balancing. In many situations, compensation is not enough in two areas. The compensation weight is therefore distributed at several points along the same plane or at fixed points at several planes, as in crankshafts. Users are advised to consult the component drawing or contact the end user for further details. For components such as fans with segmented rotors, unbalance compensation is resolved into vectors in which metal/location is available to perform unbalance compensation. Therefore, the number of places where imbalance can be compensated is only component-specific.

Can we achieve a “zero gram, zero degree” balance?

The concept of zero compensation is not applicable to compensation processes. They always balance below a certain tolerance, for example 20 millimeters grams. In short, the residual unbalance can be between 0 and 20 mmg. The component should be within tolerance. The angle of the balancing machine indicates the location of the final remaining unbalance. The residual unbalance remains everywhere in the circle without further compensation. An angle value of, for example, 5 degrees or 257 degrees has the same effect.

We get a small amount of unbalance but a large angle. Why?

The job is well balanced. Refer to the answer to the previous question about why you can't get a low degree value.

What is an ISO test rotor?

A dynamic balancing machine needs to be checked and calibrated regularly to determine the accuracy of the reading. The ISO rotor is a fully machined and ground rotor with the ability to add and remove known weights in known locations. The rotor is used as a component and the machine specifications are checked with known weights. For more information, contact the engineer or refer to ISO 2953 standards for testing procedures.

How do we choose to balance at one level, at two levels, and at multiple levels?

For dynamic balancing requirements, the component or end user decides the number of balancing planes. If such information is missing, we refer to the standards. When the length is greater than the diameter, two-plane balancing is usually done. For disc-shaped components such as small flywheels, pump rotors, and clutches, you can perform single plane balancing. Components such as multi-stage pumps, turbines and crankshafts will require multi-level balancing. The main reason for multi-level balancing is simply for ease of weight placement.

Does MBS balancing industry make rot balancing machines?

MBS Balans Sanayi has more than 25 years of experience in the industry and produces many ranges and personalized balancing machines. Balancing is produced for the automotive sector, such as: B. Safety, valance, brake disc and turbo balancing interventions as well as balancing machines. However, the production of the rot compensation machine is not yet completed

What are Onsite Balancing Services? How do you?

On-site balancing service for heavy industrial parts, difficult to transport, functional, recovered, unreturned, etc. It is a process that all rotor groups can and should undertake. Since the sensors are connected to the part's bearings during the balancing service, the vibrations generated by the machine are tracked and combated by MBS Balancing Industry's professional equipment and team of experts. This process adds the part to the balanced angle or removes the part. The duration of the process varies depending on the balance of the part, ease of engagement and type of rotor. The price for the balancing service instead of the part is known depending on the diameter, weight and labor required.

How does an industrial balancing machine work?

MBS Balans Sanayi, with his many years of experience, works continuously on research and development studies (research and development) and on new technologies. İBalancer, the last font created by combining these accumulations, offers great convenience to users. In this program, targeted, timely and financial gains are achieved. The visual simplicity of the İBalancer: “How does the balancing machine work?” It somehow often eliminates the question. If our customers want to use this program, they will receive the “balancing machine license” along with a 3-day training course. The aim of the training was to provide information about balancing and the parts of the balancing machine operator, safe handling and correct intervention.

What is the ISO 1940 standard?

ISO (International Standard Organization) is a worldwide association of national standards. The international standard is usually developed by the ISO technical committees. Every member of the organization concerned has the right to participate in the technical committee. International organizations within or outside government may participate in work related to ISO.

The draft is submitted to members for approval before being accepted as an international standard by the ISO Standards Council and prepared by the technical committee. According to standard ISO rules, at least 75% of members must be approved. International standard ISO 1940/1 for mechanical vibration and shock, prepared by Technical Committee ISO/TC 108.

This is the latest revised version of ISO 1940 – 1973. Users should keep in mind that all international standards change from time to time. Unless otherwise stated, the standards cited here are the most current regulations.

Do you produce fan balancing machines?

Please contact us to get information about fan balancing machine manufacturing.

What is a Pelton bike?

The Pelton turbine, also known as the Pelton wheel, was invented by L. Pelton in the 1870s. The basic working principle is shown in impulse type water turbines. These types of turbines use the energy provided by the moving water rather than the water's own weight. It is generally used in waters with high currents.

What is a vertical breakwater?

Vertical wave crushers, also called vertical wave impact crushers, are used in products and materials with high levels of abrasion and hardness. This type of crushers is mainly used in sand production for concrete plants, crushed stone and gravel production plants and various mines. Their biggest advantage is that they have lower operating costs compared to horizontal rotor crushers.

What is a Valeo brake disc?

Valeo brake discs are considered the most important safety element of braking systems. Considering that the quality of the friction material is very important for a system, it can be said that low friction quality can seriously endanger the braking system. For this reason, Valeo brake discs have passed various endurance tests and met the conditions required for safe driving.

What are the operating principles of balancing machines?

These balancing machines are generally used to correct imbalance and determine the position or amount of unbalanced masses or objects in a rotor. This kind of machines which reduce the unbalance situation, reduce the vibration level to the lowest level and increase the efficiency of rod bearings.