Views: 0 Author: Site Editor Publish Time: 2024-03-27 Origin: Site
The glass tempering furnace encoder is an information conversion device that compiles and converts the specific position of tempered glass or the motor signals and data of the glass tempering furnace, facilitating communication, transmission, and storage in the form of signals. So how to connect the encoder of the glass tempering furnace? Below, I will introduce to you the installation, wiring, debugging, and common troubleshooting methods of the encoder for the glass tempering furnace.
1. How to connect the encoder of the glass tempering furnace
1.1. Installation method
A rotary encoder is an optoelectronic rotary measurement device that can be installed in various forms, including high-speed end installation, low-speed end installation, and auxiliary mechanical device installation.
(1) High speed end installation: Installed at the power motor shaft end (or gear connection), this method has the advantage of high resolution. Due to the multi turn encoder having 4096 revolutions, the number of motor rotations within this mileage range can be fully utilized to improve resolution. The disadvantage is that there is gear clearance error in the back and forth travel of moving objects through the deceleration gear. It is generally used for unidirectional high-precision control positioning, such as roll gap control in steel rolling. In addition, the encoder is directly installed at the high-speed end, and the motor vibration must be small, otherwise it is easy to damage the encoder.
(2) Low speed end installation: Installed after the reduction gear, such as the shaft end of the winding steel wire rope drum or the end of the last section of the reduction gear shaft. This method has no gear to return the clearance, and the measurement is more direct and accurate. This method generally measures long-distance positioning, such as various lifting equipment, feeding cart positioning, etc.
1.2. Wiring method
We usually use an incremental encoder, which can directly input the output pulse signal of the rotary encoder to the PLC, and use the PLC's high-speed counter to count its pulse signal to obtain the measurement result. Different models of rotary encoders have different phases of output pulses. Some rotary encoders output three-phase pulses of A, B, and Z, some only have two-phase pulses of A and B, and simple ones only have phase A.
The encoder has 5 leads, of which 3 are pulse output lines, 1 is COM terminal line, and 1 is power line (OC gate output type). The power supply of the encoder can be an external power supply or directly use the DC24V power supply of the PLC. The "-" end of the power supply should be connected to the COM end of the encoder, and the "+" end should be connected to the power supply end of the encoder. The COM end of the encoder is connected to the input COM end of the PLC. The A, B, and Z two-phase pulse output lines are directly connected to the input end of the PLC. A and B are pulses with a 90 degree difference. The Z-phase signal only has one pulse when the encoder rotates, which is usually used as the basis for zero point. When connecting, attention should be paid to the response time of the PLC input. The rotary encoder also has a shielding wire, which should be grounded to improve anti-interference performance when used.
1.3. Precautions
(1) Adjust the concentricity between the encoder shaft and the motion shaft of the glass tempering furnace to avoid encoder vibration.
(2) The flexible shaft connecting the encoder shaft and the motion shaft of the glass tempering furnace must be securely fixed.
2. Common faults and solutions of encoder in glass tempering furnace
2.1. Encoder malfunction: refers to the malfunction of the encoder's components, which prevents it from generating and outputting the correct waveform. In this case, it is necessary to replace the encoder or repair its internal components.
2.2. Encoder connection cable failure: This type of failure has a high probability of occurrence and is often encountered during maintenance, making it a priority factor to consider. Usually, it is due to an open circuit, short circuit, or poor contact of the encoder cable, in which case the cable or connector needs to be replaced. Special attention should also be paid to whether it is due to loose cable fixation that causes welding or circuit breaking. In this case, the cable needs to be tightened.
2.3. Encoder+5V power supply drop: refers to a low+5V power supply, usually not lower than 4.75V. The reason for the low voltage is due to a power supply failure or excessive resistance of the power transmission cable, causing loss. At this time, it is necessary to repair the power supply or replace the cable.
2.4. Encoder battery voltage drop: This type of fault usually has a clear alarm, and the battery needs to be replaced. If the reference point position memory is lost, the operation of returning to the reference point must also be performed.
2.5. Encoder cable shield wire not connected or detached: This can introduce interference signals, make the waveform unstable, and affect the accuracy of communication. It is necessary to ensure reliable welding and grounding of the shield wire.
2.6. Loose encoder installation: This type of fault can affect the accuracy of position control, causing excessive position deviation during stopping and moving, and even generating servo system overload alarm upon startup. Please pay special attention.
2.7. Grating contamination: This will cause a decrease in signal output amplitude, and oil stains must be gently wiped off with a degreased cotton dipped in anhydrous alcohol.
Encoders play an important role in the normal operation of the glass tempering furnace. Once problems are found with the encoder of the glass tempering furnace, they should be resolved in a timely manner to ensure the normal operation of the glass tempering furnace production. The above is our question about how to connect the encoder of the glass tempering furnace? The specific installation and wiring methods of the encoder, as well as the introduction of common faults, are hoped to help everyone better grasp the method of adjusting the encoder. Of course, these are generally installed and debugged by the glass tempering furnace manufacturer. If you encounter other equipment related problems during use, please feel free to call us for consultation, and we will provide you with corresponding technical support and guidance.
