Q&A  Reducers

The following is a list of answers for frequently asked questions from our customers. Select questions to view the answers.

DCBL Hypoid Motor ・DCBL Driver

Words 

●Technical

Q1 When communicating with the driver, can the LAN cable used to connect the PC to the internet be used without modification?
Q2 How to set parameters?
Q3 How long is the product lifetime?
Q4 Can it be used with a single-phase AC100V power supply?
Q5 When can I use the simple hold function?
Q6 How much is the maximum temperature during normal use?
Q7 Can drivers from other manufacturers be used?
Q8 How much is the backlash?
Q9 If the power supply to the driver is switched off, is the stop position of the motor hold?
Q10 If equipped with a brake, can the brake be released without the intervention of the driver? Also, if the driver fails, can it be excited and released directly to the brake?
Q11 Simple holding and short brake settings are possible as stopping methods, but how are they used?
Q12 Is the control between the PLC and the driver IO or serial communication (RS-485)?
Q13 How much is the holding torque of the simple hold function compared to the rated torque?
Q14 The connection between the PC and the driver fails. Where should I check?
Q15 How much is the rate of speed fluctuation?

●Option

Q16 How much is the maximum length of the extension cable connecting the motor and the driver?
Q17 What kind of problems can be considered with longer cable?
Q18 What faults can be expected if noise occurs in the communication between motor and driver?
Q19 What problems can be expected if noise occurs in the input/output signal cable between the driver and control unit?
Q20 Which connector should I use for communication?
Q21 When is a regenerative resistor required?
Q22 How can motor extension cables be connected together?
Q23 Can the communication cable CN3 beyond the 50 mm at the end of the cable be disconnected/connected?
Q24 Is the motor extension cable a flexible cable?

●Selection

Q25 Is it possible to connect with a microUSB connector and operate while communicating?
Q26 Is the motor driven by a DC power supply?
Q27 What is the difference from induction motors?
Q28 What is the difference from servo motors?
Q29 What conditions are necessary when selecting a DCBL Hypoid Motor?
Q30 How long exactly does the short time mentioned in the motor characteristics diagram in the catalogue, etc. refer to?
Q31 Is it possible to change the cable position?
Q32 Can a reduction ratio of 1/80 or more be supported?
Q33 Can parallel shaft type be manufactured?
Q34 How often can the brakes be on/off?
Q35 Can the simple hold function be used in the same way as a servo lock?
Q36 Is stopping accuracy improved compared to induction motor + inverter configurations?
Q37 What voltage outputs does the driver support?

●Ambient environments

Q38 If no brake is used, is the misalignment due to its own weight when stopped?
Q39 What is the operating temperature for the Linipower Jack?
Q40 Can it be used outdoors?
Q41 Is it possible to change to a shaft made of a different material (e.g. stainless steel)?
Q42 What problems can be expected when used in high temperature atmospheres?
Answers
Q1 When communicating with the driver, can the LAN cable used to connect the PC to the internet be used without modification?
A1

It cannot be used as it is. Due to the different communication standards, the cable must be modified for RS-485.
For pin arrangements, refer to the instruction manual [3-2. Terminal table ●Communication connector (RS485)].

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Q2 How to set parameters?
A2

It can be set up by connecting the driver to a PC or PLC. Dedicated software is also available for PC.
For the data addresses of parameters, refer to the list of catalogs and instruction manuals.

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Q3 How long is the product lifetime?
A3

The product lifetime varies depending on the usage environment and conditions. The guideline when used in the recommended atmosphere is 20,000 hours.

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Q4 Can it be used with a single-phase AC100V power supply?
A4

Cannot be used. However, if only parameter setting changes are required, a single-phase 100 V power supply can be used.

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Q5 When can I use the simple hold function?
A5

As it is an electric holding brake, it is suitable for temporary stopping applications during flow operations, e.g. on transfer conveyors.
If a continuous hold function is required, use products with brakes.

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Q6 How much is the maximum temperature during normal use?
A6

Although it depends on the conditions of use, the upper limit of the internal temperature for both the motor and driver is 100°C.
The internal temperature of the motor/driver can be monitored by using the communication function.

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Q7 Can drivers from other manufacturers be used?
A7

Be sure to use the dedicated driver as it may cause trouble.

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Q8 How much is the backlash?
A8

The backlash of the output shaft is 60 arcmins at a reduction ratio of 1/10, and 30 arcmins for others.

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Q9 If the power supply to the driver is switched off, is the stop position of the motor hold?
A9

As this product does not use an absolute encoder for position recognition, if the power supply is cut off, the stop position when the power is restarted will be the origin.
The position information before the power was cut off is lost, so please re-set the origin position if necessary.

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Q10 If equipped with a brake, can the brake be released without the intervention of the driver? Also, if the driver fails, can it be excited and released directly to the brake?
A10

The brake can be released in direct connection with the 24 V power supply.
If you want to control brake with an external control device such as a PLC, you can replace the driver outputs in the recommended wiring with outputs from a PLC or similar device to control brake timing changes, etc.

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Q11 Simple holding and short brake settings are possible as stopping methods, but how are they used?
A11

Depending on the load, it can be used in different ways to prevent misalignment when stopped.
e.g.) If a short brake on a lifting equipment causes it to meander, it is better to use simple hold to stop it completely and then brake, so that the stop position is not misaligned.

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Q12 Is the control between the PLC and the driver IO or serial communication (RS-485)?
A12

Both communication methods are supported.

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Q13 How much is the holding torque of the simple hold function compared to the rated torque?
A13

It is approximately 67% of the rated torque. Also, as this is only a simple hold function, holding is only for a short time (a few seconds).
Not recommended for use as a substitute for mechanical brakes.

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Q14 The connection between the PC and the driver fails. Where should I check?
A14

Please check the following items.
1.Does the wiring conform to the descriptions in the instruction manual?
2.Is the USB driver installed
3.COM port settings
4.Setting the baud rate and slave address of DIP switch 1
※For details, refer to the instruction manual [3-2. ● Dip switch 1].

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Q15 How much is the rate of speed fluctuation?
A15

It will be approximately 0.5%. This represents the rate of change in the average speed of the motor when external conditions (e.g. load or temperature) change.
Similarly, there is a flutter characteristic, which describes the change in rotational speed, which represents the rotation variation of the motor's speed.
Flutter characteristics change depending on load conditions.

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Q16 How much is the maximum length of the extension cable connecting the motor and the driver?
A16

Up to 10m. If an extension is considered, use a DCBL Hypoid Motor extension cable (sold separately).

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Q17 What kind of problems can be considered with longer cable?
A17

If the length exceeds 10 m, it may be affected by noise and may not operate correctly.
※In significantly noisy environments, unstable operation may occur even at 10 m or less.
In this case, consider reducing noise by reviewing the wiring and earth/grounding, or using noise filters together.

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Q18 What faults can be expected if noise occurs in the communication between motor and driver?
A18

There is a possibility that the position detection signal of the motor is misrecognized and the operating position is wrong (e.g. passing the stop position, stopping before the stop position, etc.).
Also, the rotational state of the motor may be misrecognized, resulting in unstable rotation (e.g. backlashing of the rotation).

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Q19 What problems can be expected if noise occurs in the input/output signal cable between the driver and control unit?
A19

Signals may be misrecognized, resulting in unstable operation (e.g. motor starts/stops at unintended timing, output signal turns on/off at unintended timing).

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Q20 Which connector should I use for communication?
A20

If you want to communicate while the motor is running, use the connector for RS-485 communication.
Use the USB connector for communication when writing parameters while the motor is stopped or when checking the motor operating status.

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Q21 When is a regenerative resistor required?
A21

In lifting applications or when the inertia ratio is high, the motor may be turned from the load side to generate power and the overvoltage protection of the driver may be activated.
Regenerative resistors are used to prevent these problems.

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Q22 How can motor extension cables be connected together?
A22

The cable has male and female connectors on both ends, so it can be connected together using the cable connector.

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Q23 Can the communication cable CN3 beyond the 50 mm at the end of the cable be disconnected/connected?
A23

The lead wires are loose wires, so they can be connected together by performing terminal processing, etc.

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Q24 Is the motor extension cable a flexible cable?
A24

It is not a flexible cable.

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Q25 Is it possible to connect with a microUSB connector and operate while communicating?
A25

The microUSB connector is mainly a port for writing parameters, etc.
As stated in Q18, it is not recommended because communication may be interrupted due to noise.
If you want to operate while communicating, please use the communication connector for RS-485.

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Q26 Is the motor driven by a DC power supply?
A26

Despite the name DC brushless motors, these motors are driven by AC power.
※Because of their operating principle, they are called DC brushless motors.

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Q27 What is the difference from induction motors?
A27

Generally, three-phase motors are controlled by open-loop control with an inverter.
The disadvantages in this case are that the actual speed cannot follow load fluctuations and the motor characteristics make it unsuitable for multi-step speed change operation.
The DC brushless motor uses a Hall IC to feed back the motor's rotation status to the driver for closed-loop control, enabling stable speed and positioning control.
The motors themselves are also highly efficient and energy-saving.

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Q28 What is the difference from servo motors?
A28

Servo motors are positioned as high-performance and multi-functional, but expensive.
The closed-loop control is similar, and the servo motor enables more accurate positioning, torque control, and high-speed control. However, it is expensive because it uses high-precision parts such as encoders to achieve them.

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Q29 What conditions are necessary when selecting a DCBL Hypoid Motor?
A29

Inquiry forms are posted at the end of the catalog and on our website, so please use them.

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Q30 How long exactly does the short time mentioned in the motor characteristics diagram in the catalogue, etc. refer to?
A30

This will be a few seconds during acceleration and deceleration. Do not operate for long periods exceeding the rated rotation speed as this may cause abnormal heat generation. Back to questions
Q31 Is it possible to change the cable position?
A31

It is possible in 90° pitch. See catalogue for more details.

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Q32 Can a reduction ratio of 1/80 or more be supported?
A32

Available as a made to order product.

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Q33 Can parallel shaft type be manufactured?
A33

Available as a made to order product.

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Q34 How often can the brakes be on/off?
A34

Mechanical brake up to 10 times/min.

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Q35 Can the simple hold function be used in the same way as a servo lock?
A35

Compared to servo motors, the pulse resolution is lower, so rapid start/deceleration performance is reduced.
This makes them less frequent than servo motors, however, they can still operate at 30 times/minute.

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Q36 Is stopping accuracy improved compared to induction motor + inverter configurations?
A36

The system is controlled using Hall sensor signals, so it can stop more accurately than an induction motor + inverter without feedback control.
This does not apply to configurations with external encoders or special motors.

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Q37 What voltage outputs does the driver support?
A37

The output signal can support up to DC30V.
For example, if 24 V is connected to the power supply for external signals, the output signal is 24 V DC.

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Q38 If no brake is used, is the misalignment due to its own weight when stopped?
A38

A simple hold function is available to prevent misalignment caused by its own weight for a short period of time (please refer to the parameter setting [Selection of stopping method] in the instruction manuals for setting instructions).
However, under heavy loads, misalignment may occur.
Also, the holding force is lower than that of a servo motor.
In the case of lifting equipment, etc., the use of products with brakes is strongly recommended due to the possibility of falling under its own weight.

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Q39 What is the operating temperature for the Linipower Jack?
A39

Motor and reducer parts are limited to 0 to 40°C and drivers to 0 to 50°C.

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Q40 Can it be used outdoors?
A40

Although the motor part is IP65, it is not recommended for outdoor use. Please provide a cover or take other measures separately.
Also, the driver is not waterproof or dustproof.

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Q41 Is it possible to change to a shaft made of a different material (e.g. stainless steel)?
A41

Please contact us to discuss this, including your intended use.

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Q42 What problems can be expected when used in high temperature atmospheres?
A42

The circuit board inside the motor may be damaged and the motor may stop running.

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