Functions / Technologies
We have compiled frequently asked questions from our customers and their answers.
Please use this if you cannot find the information you are looking for or need more detailed information.
Product Category
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＊Search example : Stator Ass'y, Rated Torque
Bearings
Miniature & small ball bearings
QHow can I find the grade of the ball bearing from P/N information?
AEngineering Information
QHow much is the rotation torque range?
AEngineering Information
QI would like to know maximum axial load of the ball bearing.
A
QI would like to know radial, axial and angle clearance of the ball bearings.
A
QI would like to know the tolerance of the shaft and housing in the case of tight fitting.
AEngineering Information
QI would like to know the difference of internal design "X2", "X3" etc…
A
QI would like to know the weight of ball bearing.
A
QI would like to know chemical, acid resistant ball bearings.
A
QI would like to know useful temperature range of ball bearings.
A
QI would like to know about low-outgas grease information.
A We have a various grease of your requesting cleanliness.
We can recommend the best low-outgas grease for your requesting cleanliness and applications.
QI would like to know the difference of the P/N "608ZZ" and "R-2280HH".
A
Precision Machined Components
Precision mechanical components
QWhat is PMC?
A
Fastener
QWhom should I ask about technical question?
A Please contact your sales representative or submit your query via our Contact form.
QPlease tell me size variation of fastener.
A We will consider the size of the production of customer requirements. Please contact us for details.
QWhat kind of raw material is used for your products?
A We manufacture parts for a variety of materials including aluminum alloys , titanium alloys , alloy steels, etc. I have experience in a wide variety of materials In addition to this, more details, please contact us.
QWhat kind of surface treatment can you process?
A Minebea can perform virtually all of the surface treatment required for fasteners and mechanical parts, such as cadmium plating, silver plating, hard chrome plating, zinc plating, and others. Please contact us for details.
QWhat kind of heat treatment can you process?
A In order to ensure the product characteristics required by consensus or customers' standards , Minebea has a full line-up of heat treatment equipment, including vacuum furnaces, continuous-type furnaces, and shaker hearth furnaces for titanium alloy fasteners . Please contact us for details.
Wavy Nozzle
QWhere are the control boards stored?
A The control board is stored inside the machine control panel box.
QIs it possible to set the operation mode without a controller?
A A controller is required to set the operation mode. It can be set with a wired controller or a wireless controller using an iOS device.
QIs it possible to set the operation mode from NC?
A No. A controller (wired or wireless connection) is required.
QCan a non-NC machine use Wavy Nozzle?
A Yes, it can also be controlled by a Sequencer.
QIs there any influence of noise caused by other devices in the factory when connected via Bluetooth?
A Normally, Bluetooth can communicate over a distance of 20 meters (65 ft), but the it has been verified to be able to communicate if it is 5 meters (16 ft) in a factory noise environment.
QIs there a standard lineup of attachments (mounting jigs)?
A A standard installation kit is currently available only for FANUC ROBODRILL. However, for other machines that have a track record of installation with MinebeaMitsumi, jigs have been made into drawings and it is possible to buy mounting jigs and obtain drawings.
We can sell mounting jigs and provide drawings.
QCan Wavy Nozzle use for Semi-dry cut using oil mist?
A Yes. It can be used.
QWhat is the maximum viscosity of the cutting-oil?
A We have experience of up to 40mm2/s viscosity.
QWhat kind of coolant can be used?
A Wavy Nozzle can be used by oil based coolant WITHOUT chlorine or active sulfer and water based coolant WITH mineral oil.
If you want to use other kind of oil, please inquire from the form.
QCan Wavy Nozzle eject air instead of coolant?
A Currently there are two types of nozzles with dia. 3mm and dia. 5mm holes. Since the nozzle is attached by a 1/4 tapered screw, it can be replaced with a commercial nozzle.
QCan Wavy Nozzle use any other liquids besides coolant oil? For example, cleaning solution.
A Use with liquids other than coolant is not covered by the warranty. However, since some liquids may be usable, please consult with the manufacturer and model number of the liquid.
QIs the M-code signal used to operate Wavy Nozzle a "shot signal" or "Latch Signal"?
A Latch signal is required.
QIs it possible to change the cable between the ejection unit and the control board to longer cable?
A No.Operation is guaranteed with the product cable length of 6 meters (20ft). If the cable is extended, it cannot be guaranteed. If the length is not enough, divide the control board and extend it with a cable.
QThere are 5 M-code inputs with the standard setting. How can it be expanded up to 31 settings?
A By changing M-Code process mode to "5-BIT", the 31 settings can be called up by combination of 5 codes on a single input line.
QKICK mode has a function of oil ejection of one-direction. Does Wavy Nozzle have a built-in valve?
A No, Wavy Nozzle does not have a valve itself, but it can control the ON/OFF valve signal in the machine.
QHow are air and oil connected?
A An existing nozzle(s) is typically removed and replaced with a Wavy Nozzle unit. An existing or new coolant line would need to attach to the Wavy Nozzle. An adapter may be necessary.
QHow to wire Nozzle cable?
A Nozzle cable is routed using existing holes inside machining area.
QWhat is the oil inlet of the ejection unit?
A Rc3/8 female (BSPT)
QCan discharge pressure be adjusted?
A No. There is no valve or pressure-increasing function inside the Wavy Nozzle, and the pressure of the pump dominates the discharge pressure because it is just a flow path.
QIs there any limitations regarding the mounting direction?
A There is no limit, as any position/orientation will not affect its ability to operate.
QCan we buy a mounting jig?
A Standard mounting jigs can be supplied as drawings. They can also be sold (extra cost).
QCan we obtain CAD files to consider installation?
A Yes, CAD files can be provided.
QIs it necessary to connect the controller even during operation?
A No. The controller is needed only for setting up the operation mode. Once the setting is complete, there is no problem in operation, even if the controller is removed.
QIs there an alarm signal output that informs the failure of Wavy Nozzle to the machine?
A Yes. An alarm output terminal is provided on the control board. You can respond by connecting the wiring from the control board to the machine and adding it as an alarm condition or a stop condition. Connection and NC setting is needed.
QIs there the function that notifies the Wavy Nozzle when the machine stops or has an alarm signal?
A Yes. There is an External alarm input terminal in the control board.
QIs there a case where all coolant is processed only with the Wavy Nozzle?
A Yes. But, depending on the situation not all processes can be covered with just a single Wavy Nozzle. In that case, please use a fixed nozzle together.
QAre there any variations of the nozzle available?
A Currently there are two types of nozzles with dia. 3mm and dia. 5mm holes. Since the nozzle is attached by a 1/4 tapered screw, it can be replaced with a commercial nozzle.
QDo chips clog inside Wavy Nozzle?
A If chips larger than the nozzle diameter enter, they will clog. If clogged, remove the nozzle and blow with air to remove chips.
QDoes vibration of the nozzle's movement affect accuracy?
A From our experience in precision machining at MinebeaMitsumi, it is not a problem as long as the Wavy Nozzle unit is mounted tightly.
QHow to troubleshoot error codes?
A Please check the diagnostic chart.
QWhat is the solution when coolant pressure drops?
A Please clean the filter and coolant tank.
QCoolant stream is scattered and diffused, and is difficult to spray at the desired cutting point.
A Attach a flow straightening adapter to the nozzle.
QWhat is the countermeasure for the limited installation space that prevents injection at the cutting point?
A Install a variable angle nozzle. It increases the range of injection positions.
QWhat is the difference from the high pressure coolant system?
A High-pressure coolant equipment forcibly breaks chips with high-pressure cutting oil injection of 10 to 20 MPa. The Wavy Nozzle allows the chips to extend and flow in one direction. The chips are not necessarily broken. In the following cases, try using a Wavy Nozzle:
Rotary Components
Stepping motors
QWhat are the advantages and disadvantages of stepping motors?
A
QWhat is a stall, and why does it occur?
A
QWhat is the difference between 2-phase and 5-phase stepping motors?
A
QWhat is needed to operate a stepping motor?
A
QWhat is the lifespan of a stepping motor?
A
Hybrid stepping motors
QWhat are the differences between Permanent Magnet (PM) stepping motors and hybrid types?
A Hybrid stepping motors feature finer step angles, providing higher resolution and greater torque output than PM types.
While PM types have a simple structure and are low-cost, hybrid models incorporate a gear-toothed magnetic core and a permanent magnet in the rotor. This design makes them highly suitable for industrial equipment requiring precise positioning and high power output.
QWhat is the lifespan of a hybrid stepping motor? Does it require regular maintenance?
A
The motor's lifespan is essentially determined by its internal bearings. Since there are no wearing parts like brushes, they are virtually maintenance-free over long periods.
Under normal conditions, they boast a lifespan of tens of thousands of hours. However, excessively high ambient temperatures or applying radial (lateral) or thrust (axial) loads exceeding specifications will accelerate bearing wear. Designing your system within the tolerances specified in the data sheet is crucial for maximizing service life.
QHow do they differ from servo motors, and which should I choose?
A
The primary advantages of stepping motors are the elimination of complex setups like gain tuning, combined with high low-speed torque and strong holding power at a standstill.
Servo motors are preferable when high-speed operation or rapid response to sudden load changes is critical. Conversely, hybrid stepping motors are recommended when exact positional holding is required or when implementing simple, cost-effective open-loop control.
PM stepping motors
QHow can I achieve higher torque with a PM stepping motor?
A
To achieve higher torque, consider models equipped with a gearbox, such as planetary gears, or types utilizing strong neodymium magnets.
Gearbox-equipped models can output significant torque depending on the reduction ratio. Additionally, high-speed types combining a bonded neodymium magnet and a silicon steel stator deliver high torque and responsiveness despite their compact size.
QWhy can PM stepping motors be designed so thin?
A
Their simple structure allows for a shorter axial length.
While hybrid stepping motors feature a complex three-dimensional structure sandwiching a magnet between two gear-shaped iron cores, PM types consist of a cylindrical magnet and a sheet metal frame. This facilitates a thinner profile, and we offer a lineup of thin models under 15 mm. For compact motors with an outer diameter of 10 mm or less, we also offer products under 5 mm in length.
QWhich is better for a PM stepping motor: unipolar or bipolar?
A
Bipolar drive is generally recommended because of its superior torque efficiency, delivering the required force in a smaller footprint.
While unipolar circuits are simpler to implement, they are less efficient as they only energize half of the coil at a time. In contrast, bipolar drives utilize the entire coil, generating substantial torque even with limited battery voltage or compact motor sizes.
Hybrid stepping motor drivers and driver-integrated motors
QWhat is the origin of the name "cX-stepper" ?
A
The name "cX-stepper" originates from the acronym of our proprietary control technology enabling diverse motion control.
Specifically, it stands for "Complete motion control with 'X-tec' stepper drive technology."
QAre there other motors compatible with the cX-stepper driver besides those with absolute encoders?
A
We plan to gradually expand compatibility to include motors with electromagnetic brakes and gearheads.
Please contact us for detailed schedules and specifications.
Brush motors
QWhere are brushed DC motors used in multi-function printers (MFPs)?
A They power paper feeds, move ink cartridges and scanner heads, and operate trays. They are ideal for applications requiring simple unidirectional or reciprocating motion.
QWhat are the advantages of choosing a brushed DC motor over a brushless one?
A The primary advantage is its simple configuration, which requires no motor driver. They operate simply by connecting them to a DC power supply, and speed is easily controlled by varying the voltage via PWM. This reduces costs and saves PCB space. As long as they meet your required lifespan, brushed DC motors are the more cost-effective choice.
QHow can the lifespan of a brushed DC motor be extended?
A Effective measures include operating within rated limits, providing rest periods, and adding capacitors. Fundamentally, you must adhere to specifications by avoiding excessive loads and overcurrent. Adequate rest periods prevent overheating, while adding capacitors absorbs sparks that degrade the contacts, ultimately extending the motor's life.
QHow can I reverse the rotation direction of a brushed DC motor?
A Simply swap the positive (+) and negative (-) terminals (polarity reversal). The ability to change direction without complex electronic circuits is a key advantage.
QCan a brushed DC motor be run directly from a household AC outlet?
A No. As the name implies, they operate on direct current (DC). You must convert alternating current (AC) to DC using an AC adapter or similar device before connection.
Brushless motors
QHow much longer is the lifespan of a brushless DC motor compared to a brushed DC motor?
A It is typically over 10 times longer, depending on operating conditions and brush materials. While a brushed motor's lifespan is limited by brush/commutator friction and electrical spark wear, a brushless motor's lifespan is determined by bearing grease degradation and electronic circuit longevity. Brushed motors average 200 to 1,000 hours, whereas brushless motors can last for several thousand hours or more.
QWhat are the disadvantages of brushless DC motors?
A The primary disadvantages are higher upfront costs compared to brushed DC motors, and the need for a dedicated driver (drive circuit). Brushless DC motors cannot operate simply by connecting a power supply directly to them. Because an IC and PCB are required to control current switching, the initial cost is higher than that of brushed DC motors.
QWhy do brushless DC motors require a driver circuit?
A To precisely switch the direction of the coil current in sync with the rotor's position. Unlike brushed DC motors, they lack mechanical contacts that automatically switch the current. An electronic circuit must perform this function to maintain motor rotation.
QHow is the rotation speed of a brushless DC motor controlled?
A The rotation speed is controlled by finely switching the timing of the electrical current. Specifically, increasing the voltage results in higher speeds, and decreasing it results in lower speeds. PWM and VSP control are the primary methods used for this speed adjustment.
QWhat are the specific applications for brushless DC motors?
A They are widely used in drones, air conditioners, refrigerator compressors, cordless vacuum cleaners, and electric vehicle (EV) drive units. Because they lack wearing parts (brushes), they feature long service life, quiet operation, and high efficiency. These characteristics make them an essential power source for products requiring these three features.
Vacuum Pump (under development)
QAre there any orientation restrictions for installing the pump (e.g., vertical or horizontal)?
A
There are no specific restrictions on the installation orientation. It can be mounted
vertically, horizontally, or upside down to fit the available integration area.
Note: Ensure that the tubing does not kink during routing and that the pump is properly
secured to prevent vibration from affecting other precision components.
QAre there performance impacts when using the pump at high altitudes?
A
Yes. Because atmospheric pressure decreases at higher altitudes, the achievable vacuum
pressure (absolute pressure) and effective flow rate will be lower than at sea level.
Since vacuum pump performance is relative to ambient atmospheric pressure, please account
for this performance reduction and set up higher safety standards if you plan to use the
pump at altitudes above 1,000m.
Fan Motors
AC fan motors
QAre there any restrictions for mounting method about fan motor?
A Since ball bearings are used for the bearings, the mounting can be selected horizontally, vertically, or tilted.
DC fan motors
QAre there any restrictions for mounting method about fan motor?
A For either the suction or the exhaust type, horizontal, vertical or inclined installation can be selected. However, some models have a limited mounting direction. In that case, please check the specifications as "mounting attitude".
QPlease tell me protection method when blade is locked.
A Motor burnout is prevented by the current cut-off automatic restoration function.
QPlease tell me connection method.
A We connect lead wires[red:+,black -] from fan motor body to DC power supply with specified voltage.
QPlease tell me how to choose "with ribs" or "without ribs".
A We select "with ribs" when fix frame through and "without ribs" when fix on one side of flange.
DC blower fan motors
QPlease tell me protection method when blade is locked.
A Motor burnout is prevented by the current cut-off automatic restoration function.
QPlease tell me connection method.
A We connect lead wires[red:+,black -] from fan motor body to DC power supply with specified voltage.
High-pressure blowers
QCan I ask technical questions here?
A Please use the Conract form and make sure to include the model number.Engineering Information
QWhat power supplies do we need?
A The drive circuits require an AC power supply: 200 V (-475, -477, -478 models) or 100 V (-478 model); the signal circuits, a DC power supply: 0-10 V.
QHow do we install and connect?
A Please refer to the Instruction Manual for instruction.
QCan you supply blowers alone?
A No, only as sets.
QWhat is the service life?
A The warranty is for one year or 5,000 hours.
A product's service life depends on the customer's usage conditions.
Sensing Devices
Load cell
QWhat is the accuracy of the load cells?
A
QDo you offer CE-compliant load cells?
A
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