Servo motor as the core power components of industrial equipment, its life is directly related to production efficiency and cost control. However, in practice, many seemingly ordinary operations are unknowingly accelerated motor loss.
First, the life of the four "killers": what operations are shortening the life of the motor?
The durability of the servo motor is not inherently destined, but is "quietly eroded" by the details of daily use:
1. overload operation: let the motor "overdraft life"
Subjecting a motor to more than its rated load for a long period of time is equivalent to subjecting an athlete to daily extreme training. For example, if a motor with a rated torque of 5N・m is continuously used for a load of 6N・m, the insulation of the windings will deteriorate faster, and the original 10-year lifespan may be reduced to only 2-3 years. An automated production line ran its motors at full load to meet a deadline, and within a year, the motors were shut down due to burnt out windings, resulting in a repair cost of more than $30,000 yuan.
2. Environmental erosion: dust, high temperature and humidity of the "chronic poison"
High-temperature baking: motor operating temperature exceeds the rated value of 10 ℃, the insulation life in half. A drying equipment motor working in 85 ℃ environment for a long time (rated 70 ℃), 2 years after the insulation performance fell dramatically, had to be replaced early.
Dust intrusion: Cutting fluid mist or dust from the metal processing workshop enters the motor, which may block the heat dissipation holes or damage the encoder. A machine tool servo motor due to insufficient dust, encoder failure 3 times in 6 months, each time the loss of thousands of dollars downtime.
3. Improper control: the "invisible loss" of the wrong operation
Sharp acceleration / sharp braking: frequent violent start and stop will make the motor rotor shock load, a packaging machine so the rotor guide strip fracture, life shortened by half.
Positioning deviation: Insufficient control accuracy leads to repeated "correction" of the motor position, a semiconductor equipment motor running 200 hours per year more ineffective action, bearing wear increased by 40%. 4.
4. lack of maintenance: small problems dragged into a major failure
Bearing oil shortage: servo motor bearing grease needs to be replaced every 2 years, a textile factory forgot to maintain, 4 years after the bearing hold dead burned, and associated damage to the reducer, the total loss of more than 100,000 yuan.
Encoder dust: not regularly clean the encoder window, dust can lead to counting errors, a CNC machine tool processing accuracy fluctuations, scrap rate rose 5%.
Second, the selection of pit avoidance: how to choose the right motor "innate longevity"?
1. Load matching: leave enough safety margins
When choosing a motor, just like buying shoes to leave a little space:
Continuous load: daily working torque does not exceed 80% of the rated torque of the motor.
Matching inertia: It is best to keep the load inertia to no more than 3 times the motor's rated inertia, as this may result in sluggish response or overloaded bearings.
2. Environmental adaptation: put the right "protective clothing" on the motor.
Normal environment: choose IP54 protection (splash and dust proof) for office or clean workshop.
Harsh environment: IP65 fully enclosed motor for dusty scenes (e.g. cement factory), IP67 waterproof for humid environments (e.g. food processing factory), and high-temperature insulating material for high-temperature scenes (over 180℃).
3. Control performance: precision drive to reduce losses
Encoder precision: precision positioning scenarios (such as semiconductor equipment) choose high-resolution encoder (such as 23-bit absolute encoder), positioning error is smaller, reducing the wear and tear of ineffective movement.
Driving algorithm: high-quality driving algorithm (such as current feed-forward control) can reduce the motor heat, a lithium battery equipment adopted, the winding temperature decreased by 20%, life expectancy increased by 15%.
Third, the installation and commissioning: details determine the starting point of life
1. Mechanical installation: alignment and fixed "life and death"
Coaxiality is crucial: if the motor shaft and load shaft are not concentric (deviation > 0.05mm), the bearings will be subjected to additional radial forces, and a certain printing press will therefore need to replace the bearings every six months (normal life of 2 years). Always calibrate with a micrometer when mounting.
Screw torque specification: the screws for fixing the motor must be tightened according to the manufacturer's requirements (e.g., M4 screws need 2.5N・m torque), a production line due to loose screws leading to excessive motor vibration, encoder connection line breakage, downtime loss of 20,000 yuan. 2. electrical wiring: anti-interference, anti-disturbance, anti-gas, anti-dumping, etc.
2. Electrical wiring: anti-interference and grounding of the "law of life"
Independent grounding: the motor must be individually grounded, grounding resistance should be less than 1Ω, otherwise it may be due to electromagnetic interference resulting in abnormal overload. A device due to poor grounding, the motor winding temperature inexplicably rises 15 ℃.
Cable isolation: power lines and signal lines are laid separately to avoid interference. A servo motor has been due to cable mixing, frequent overload alarms, consuming more than 50 hours of maintenance time each year.
Fourth, the maintenance of the actual combat: three steps to make the motor "life extension"
1. regular "physical examination" list
Bearing lubrication: every year or after 2000 hours of operation, remove the old grease and inject new grease (the amount of about 1/3 of the bearing cavity), to avoid grease hardening failure.
Encoder cleaning: Wipe the encoder glass disk with anhydrous ethanol every quarter to prevent dust from blocking the optical path and causing counting errors.
Heat dissipation check: clean up the fan blade dust every month to ensure that the heat dissipation holes are smooth, touch the motor shell with your hand, the temperature should not exceed 70 ℃ (feel slightly hot but can be contacted for a long time).
2. state judgment: look and smell method
Listen to the sound: the normal operation of the sound of uniform "buzzing", if there is a "click" sound may be bearing wear, "hiss" sound may be poor heat dissipation or electromagnetic abnormalities.
Touch temperature: shell overheating (hot), immediately stop the machine to check the load or heat dissipation, to avoid accelerated aging of insulation materials.
Look at the appearance: observe the motor surface whether there is oil, dust accumulation, whether the terminal is loose, whether the encoder cable is broken. 3.
3. Fault early warning: discover potential crisis in advance
Vibration monitoring: Use hand-held vibration meter to detect, if the vibration amplitude suddenly increases (e.g. from 2mm/s to 5mm/s), it may be bearing wear or loose installation.
Temperature Trend: Establish a motor temperature profile. If the temperature in a certain area continues to rise (e.g., 5°C per month), it is necessary to investigate whether it is due to increased load or internal abnormality.
V. The "cost-effective philosophy" of life management
1. Initial investment vs. long-term cost
Choose a higher specification of the motor (such as rated torque from 5N・m to 7N・m), the initial cost increased by 20%, but the life of the motor may be extended by more than 3 times, the overall cost is lower. A company chooses high protection motors for precision equipment, although it costs 10,000 RMB more, it avoids 3 times a year downtime due to environmental problems, and saves more than 50,000 RMB annually.
2. Repair vs Replacement
Repairable scenario: If the motor is only bearing wear or encoder failure, the repair cost is about 30%-50% of the new product, and can retain the original parameters match.
Replacement scenario: when the winding is burnt, the rotor is seriously deformed or the insulation resistance is lower than the standard value, decisively replace the motor with a new one to avoid damaging other parts.
If your equipment has problems with servo motors that are not securely fastened, are not positioned correctly, or are not sufficiently resistant to the environment, Jetson Drive has a professional solution for you:
Applicable Scenarios
✅ Precision machining
Anti-vibration locking of CNC machine servo motors: Ensure no displacement during high-speed cutting (speed ≥15000rpm) and stable machining accuracy of ±0.003mm.
Grinding machine servo motor rigidity fixed: eliminate vibration deviation generated by high-speed rotation of the grinding wheel, surface roughness control within Ra0.2μm.
✅ Automated production line
High-speed transplanter servo motor fast locking: Repeat positioning accuracy ≤ ±0.01mm, to meet the needs of 3C product sorting in seconds.
Shock-resistant fixing of servo motors for assembly robots: adapting to high-intensity operation scenarios with frequent start/stop (cycle time ≤ 5 seconds).
✅ Extreme environment equipment
Aviation servo motor high and low temperature resistant locking: keep the locking force stable under the temperature difference of - 55℃~+125℃, through the GJB 150A environmental test.
Chemical equipment servo motor anti-corrosion fixed: stainless steel + Teflon coating, resistant to pH 1-14 strong corrosive environment
✅ Medical and Food Machinery
Clean locking of servo motors for medical imaging equipment: ISO 14644-1 Class 5 compliant, no risk of metal particles falling off.
Food packaging machine servo motor sanitary fixed: surface electrolytic polishing treatment (Ra ≤ 0.4μm), meet FDA food contact safety requirements
Contact us
📞 Tel: +86-8613116375959
📧 Email: 741097243@qq.com
🌐 Official website: Servo motor professional locking program
Program Advantages
High-precision locking: Adopting wedge-type patented structure, axial displacement ≤ 0.002mm after locking, 5 times better than the traditional flange program.
Fast installation: magnetic alignment design, single person can complete the installation in 5 minutes, 90% more efficient than welding.
Long-life design: key components are made of aircraft-grade aluminum alloy (strength ≥ 6061-T6), with a service life of more than 10 years.
Choose Jiesheng Drive to improve the reliability of servo motors from the details, so that equipment operation is more stable and maintenance is more worry-free!
