Reasons against metal corrosion, appropriate measures can be taken to prevent metal corrosion, there are several common methods. 1) change the internal structure of the metal. For example, manufacturing various corrosion-resistant alloys, such as adding chromium and nickel to steel, made of stainless steel. 2) protective cover method. Protective cover on the metal surface, corrosion around metal … Continue reading Methods of protection and protection of metal materials

Metal surface will usually accompanied by dust, grease, oxidation, rust, pollutants, salinity or loosening of the old film, in which scale is relatively common, but most overlooked parts. Oxide in iron and steel produced by hot forging forming of a compacted oxide layer, usually attached to the comparison, but compared to the steel itself is … Continue reading Before anti-corrosion metal decoration material

Pigment of this preservative is usually at the same time, corrosion mechanisms includes physical, chemical and electrochemical aspects. (1) physical preservation. Appropriate accompanied by reacting with the oily film paints can be dense coating, antiseptic effect of physical strengthening. For example, lead-containing paint and oil to form lead soaps, anti-corrosion coating density, which reduces the penetration … Continue reading Metal decoration material corrosion theory

In General, the General method is as follows: (1) General purpose inverter (only v/f control mode of the inverter). Frequency operation can meet the requirements of the machine, in most cases, you can select a general-purpose inverter. For example, coal handling machines, dyeing machines, escalator, and so on. Running characteristics are: don't depend on mechanical properties … Continue reading Inverter model options

After meet the power criterion is not the same motor can it load. To make the motor with dynamic load, torque requirements must also be met. That is, the conversion of the rated torque of the motor must be greater than the load on the motor shaft torque, as shown in Figure II. TMN≥TL′ These conditions may … Continue reading Variable-frequency drive system torque conditions

OMRON Programmable terminals (PT) is a main auxiliary equipment for field monitoring. Programmable terminals, systems and production processes can achieve real-time control, parameter setting and modifying, real-time alerts and many other features, can replace a simple programmer programming online. Here is a brief introduction of medium-typical products of PT NT31/NT31C. (1) screen display PT can be generated … Continue reading OMRON-PLC programmable Terminal (PT) the basic function of

NT31/NT31C digital memory table stored value can be displayed (decimal or hexadecimal). By changing the digital data can be stored in the memory table to change the displayed number. Displays the decimal number, displayed value the integer part and the fractional part of the number should be set in advance. (1) display The string is stored in … Continue reading OMRON-PLC programmable Terminal (PT) data

NT31/NT31C in one of the following three ways to connect to the PC. (1) PC link PC 1:1 link connected to the PT, PC and read out by top-link communication and display. This approach can be used to connect most types of PC. (2) NT link (1:1) PC connection 1:1 connection to the PT, by NT link (1:1) communication … Continue reading OMRON-PLC programmable Terminal (PT) communication with the PC