With the widespread adoption of automated equipment, encoders play a vital role in mechanical production, being widely used in electronic equipment, machinery, and other fields. These include tobacco machinery, printing machinery, packaging machinery, textile machinery, food machinery, automotive parts production lines, precision inkjet printing, welding, and precision position control. Encoder malfunctions are a very common problem, so let's learn how to handle them!
I. Seven Common Faults
1. Servo motor encoder malfunction
This indicates a component failure in the encoder itself, causing it to be unable to generate and output the correct waveform. In this case, the encoder needs to be replaced or its internal components repaired.
2. Encoder connection cable fault
If the encoder cable is open-circuited, short-circuited, or has poor contact, the cable or connector needs to be replaced. Special attention should also be paid to whether the cable has been loosely secured, leading to welding defects or a break in the circuit; in this case, the cable needs to be tightened.
3. Encoder +5V power supply drops
This indicates that the +5V power supply is too low, and it should not be lower than 4.75V. This is caused by a power supply failure or excessive resistance in the power transmission cable. In this case, the power supply needs to be repaired or the cable replaced.
4. Absolute encoder battery voltage drop
Faults usually have a clear alarm, in which case the battery needs to be replaced. If the reference point's position memory is lost, you must return to the reference point.
5. The encoder cable shield is not connected or has fallen off.
Interference signals will be introduced, making the waveform unstable and affecting the accuracy of communication. Therefore, it is necessary to ensure the reliable welding and grounding of the shielding wire.
6. The encoder is loosely installed.
It will affect the accuracy of position control, causing excessive deviation between the stop and move positions, and even causing the servo system to be overloaded as soon as it is turned on.
7. Raster contamination
This will reduce the signal output amplitude, so you must gently wipe away the oil stains with cotton soaked in anhydrous alcohol.
II. Solutions
1. Replace with a new encoder
2. Secure the terminal pins firmly in place.
3. Repair the power supply or replace internal components of the encoder; the voltage must not be lower than 4.75V.
4. Shielding component equipment
5. Ensure the encoder is firmly positioned to guarantee accurate measurements.
6. Wipe with a grease-free surface dampened with alcohol.
