OKmarts Industrial Parts Mall
OKmarts is an authorized and one-stop online mall for industrial parts covering refrigeration compressors, servo drives, servo motors, amplifiers, VFDs, HMIs, PLCs, encoders, sensors and more!
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52 products »
Emerson Alco Expansion Valve TRAE30HW90
Refrigerants: R22 Packing and shipping Packaging Regulation : Wooden box Delivery time :...
HITACHI VFD Frequency Converter J100-A-002LF2
HITACHI J100-A Series IGBT Inverter INPUT:3PH 200-220V 50Hz 3PH 200-230V 60Hz OUTPUT:200-230V 0.2kW Packing and shipping Packaging Regulation : Wooden box...
HITACHI VFD Frequency Converter J100-002LF2
HITACHI J100 Series IGBT Inverter INPUT:3PH 200-220V 50Hz 3PH 200-230V 60Hz OUTPUT:200-230V 0.2kW Packing and shipping Packaging Regulation : Wooden box...
Siemens Soft Starter 3RW3014-1BB14
Sirius 3kW 3HP Packing and shipping Packaging Regulation : Wooden box Delivery time :...
Siemens Soft Starter 3RW3013-1BB14
Sirius Siemens Sirius Soft Starter 3RW3013-1BB14 Packing and shipping Packaging Regulation : Wooden box Delive...
Inovance Touch Screen IT6000 Series 7-INCH INPUT:24VDC Packing and shipping Packaging Regulation : Wooden box...
13 technical articles »
How to Control Speed of Servo Motor & Anti-Interference Measures
Dec 31, 2021 | markee
A servomotor refers to the actuator to control the operation of mechanical components in the servo system and is a subsidy motor indirect transmission device. The servo motor can control speed, whose position accuracy is high, and convert voltage signal into torque and speed to drive the controlled object. A servomotor speed is controlled by the input signal, responding quickly....
Dec 28, 2021 | markee
PLC (Programmable Logic Controller) and VFD (Variable Frequency Drive) play an important role in industrial production and technological development. They have been widely used in the field of industrial automation and mechanical automation. The control of the PLC and VFD is quite intelligent and automated, which brings great convenience to industrial production and life. The PLC and VFD will perform intelligent calculation, control and output according to the predetermined program. Today we will focus on how the PLC and the VFD communicate, and in what ways? First, let's take a look at their respective basic structures....
List of Problems and Solutions for Centrifugal Air Compressor
Dec 22, 2021 | markee
As a speed type air compressor, centrifugal compressor can generate air flow moving in radial direction. Centrifugal air compressors are used by a large number of companies today because of their high-pressure tightness. Therefore, common faults in the operation have become one of the most concerned issues for users. This article will discuss causes of centrifugal compressor failures and give corresponding maintenance measures. At the end, OKmarts has listed the problems and solutions in detail for your quick reference....
Troubleshooting of Diffusion Silicon Pressure Transmitter
Dec 17, 2021 | markee
Diffusion silicon pressure transmitter is applied in a wide variety of industries, such as petroleum, chemical industry, steel, power, light industry and environmental protection industry. It can complete the work of measurement and control of the gauge pressure, negative pressure or absolute pressure of various fluid pressure. Most importantly, this type of transmitter can be used in corrosive medium and harsh or dangerous environment. In the process of using the transmitter, there may be some faults or problems....
A Quick Look at HMI Touch Screen in Industrial Scenes
Dec 08, 2021 | markee
In modern society, mobile phone is almost a necessity for everyone. When your mobile phone is not around, you may easily feel anxious as if something is missing, which is called nomophobia. In the past, people used to check if they had taken money when they went out. But now, mobile phone is the thing people must take. As is known to us, as long as you take a mobile phone, it's easy to get food, clothes, and to take transport. Look at our mobile phones, you will find almost all of them are equipped with touch screens now, which are much better than the early keyboard for using. So, how much do you know about HMI touch screens in industrial scenes?...
Basics of Encoder and Orthogonal Coding
Dec 07, 2021 | markee
Encoder is a kind of electromechanical equipment, which can be used to measure the movement of machinery or the target position of machinery. Most encoders use optical sensors to provide electrical signals in the form of pulse sequences, which can be converted into motion, direction or position information in turn....
Photoelectric Encoder on CNC Machines Troubleshooting and Solutions
Dec 03, 2021 | markee
CNC machines is the abbreviation of "Computer Numerical Control" machines. It is an automatic machine tool with program control system. The control system can logically process the programs with control codes or other symbolic instructions, decode them and express them with coded numbers. Next, the coded numbers will be input into the numerical control device through the information carrier. After calculation and processing, the numerical control device sends out various control signals to control the action of the machine tool. CNC machine can automatically produce parts or other products according to the shape and size specified by the drawings....
Calibration of Rosemount Transmitter
Dec 03, 2021 | markee
When adjusting the transmitter, please turn off the protection setting, which is usually the red switch in front of the meter and its status may be ON or OFF. If it is ON, you will not be able to make the calibration adjustment....
Nov 29, 2021 | markee
ASHCROFT pressure transmitter is one of the most commonly used transmitters in industrial applications. It is widely used in a variety of control environments, involving water conservancy and hydropower, railway transportation, intelligent building, production automation, aerospace, military, petrochemical, oil wells, electric power, ships, machine tools and pipelines. ASHCROFT pressure transmitter is an electronic device that senses the pressure signal and converts it into an available output electrical signal according to certain rules....
Basics of Industrial Control System and the Use of PLC
Nov 26, 2021 | markee
The components of industrial control system (ICS) can be roughly divided into two categories according to their location: control center equipment and remote site equipment....
3 more technical articles from OKmarts Industrial Parts Mall »
103 news releases »
What does the Tire Pressure Sensor Fault Mean?
Dec 30, 2021 | Automotive sensors are the fastest growing and most used type in recent years. The development of the automotive industry stimulates the improvement of automotive pressure sensors. Advanced manufacturing and process technology strengthen the performance of sensors, and tire pressure monitoring is increasingly accurate.
Car AC Compressor Troubleshooting-- Best Suggestions
Dec 30, 2021 | Using a straight edge and a feeler gauge to examine the flatness error between cylinder head, cylinder block, crankcase and bottom cover, which should not be more than 0.05mm, otherwise, you should grind it. If there are cracks in the cylinder block and cylinder head through observing or knocking, replace them with new ones.
Where is Servo Motor and Servo Drive Used?
Dec 29, 2021 | With the development of information, communication and automation technology, a wide variety of automatic control devices have been used in industry production and daily life of modern world. As one of the most common devices for automatic control, servo system, constituted by servo motor and servo drive has been widely used in our daily life.
With our article here, you can get a deeper understanding where exactly can servo motor and servo drive can be used.
Basics of Servo Motor You Should Know
Dec 29, 2021 | Servo control refers to the effective control of the position, speed and acceleration of certain object to meet a certain purpose. It is one of the most important control methods in modern industry.
Servo control system has been so widely used in industry, but do you know the basic knowledge about servo control? Check out this article to learn about how servo control system works and setting up tips.
How to Replace Refrigerator Compressor
Dec 28, 2021 | If the refrigerator compressor is broken and can no longer be repaired, you need to buy a new one to replace it. When replacing, you need to follow the correct steps. Then how to change the refrigerator compressor? The following are the detailed steps.
When You Should Use an Absolute Encoder - Pros and Cons of Different Absolute Encoders
Dec 28, 2021 | As is known to us, rotary encoders consist of incremental encoders and absolute encoders. And absolute encoders are much more expensive than incremental encoders. In fact, both two types of encoders are used for position measurement. So what's the point of using an absolute encoder?
For distance measurement applications, both incremental and absolute encoders can be chosen - from a technical point of view. The advantages of absolute encoders are reflected in accuracy and performance, while incremental encoders seem more economical and practical.
6 Reasons for Refrigeration Compressor Not to Start
Dec 27, 2021 | When speaking of air conditioners, everyone is familiar with them. Especially in the hot summer, we would not know how to live without it. But when it comes to refrigeration compressors, many consumers are not particularly clear. In fact, the refrigeration compressor is an important part of air conditioners and refrigerators, and its performance and quality directly determine the cooling effect of them. The following is an introduction to the types of refrigeration compressors.
Why Refrigeration Compressor Oil Deteriorates & How to Add Oil
Dec 27, 2021 | The lubricating oil used in a refrigeration compressors can lubricate the friction surface, reduce the friction work, friction heat and avoid wear of the compressor motor. Besides, filling the sealing part with oil can ensure its performance and prevent the leakage of refrigerant.
Here are four reasons why the oil of refrigeration compressor deteriorate.
Japanese Giant Mitsubishi Heavy Industries Goes Into Central Air Conditioners for Home Use
Dec 26, 2021 | In recent years, it's probably difficult for people to choose between central air conditioners and split air conditioners for home use. In fact the time that central air conditioners are used for home refurbishing is not long yet.
To many people, central air conditioner is an integrated indoor temperature control solution. Compared with the traditional split air conditioner, it has higher efficiency, lower energy consumption, and at the same time, it can save indoor space and maintain the integrity of the interior decoration.
Regarding its installation, central air conditioner is installed in hidden places in the room, mostly attached to the ceiling, which is much more beautiful than cabinet type or split hanging type air conditioner.
High Temperature Mulfunction of Screw Compressor and Solutions
Dec 26, 2021 | 1. Reasons of High Temperature Breakdown
1.1 Environmental Factors
Ambient temperature may not be the main cause of high temperature shutdown, but it is often the inducement of compressor high temperature shutdown.
Generally, technicians have a design operating environment temperature (30-40 ℃) when designing compressors. When the air compressor is operated under the designed operating environment temperature, its maximum temperature is close to the protection temperature of the air compressor.
