Maintenance Guide for Surface Mount Technology (SMT) Machine Drive and Motor System

• Clean the motor heat dissipation fins with anhydrous ethanol (to prevent overheating and burning out);
• Clean the ventilation filter screen of the drive controller with a vacuum cleaner and an anti-static brush (dust accumulation causes overheating failure rate ↑30%).

Taboo: Do not directly blow compressed air onto the encoder (it may damage the optical grid).

• Apply lithium-based grease (such as Mobilith SHC 100) to the guide rails of linear motors and replenish it every 500 hours.
• The lead screw drive mechanism uses ISO VG32 grade lubricating oil (such as THK AFB-E).

Fastening: Check the torque of the motor installation bolts monthly (refer to the equipment manual, for example, YAMAHA requires 10±1N·m).

• Check whether the motor power cord/encoder cord is worn (broken skin may cause a short circuit);
• Shake the test connector (a loose connection will cause an alarm at the ERR-410 position).

Grounding resistance: Quarterly detection of the grounding resistance of the drive cabinet ≤4Ω (to prevent static interference).

• Run the mounting head without load and record the current value at the rated speed (15% higher than the initial value requires a warning).
• The vibration velocity of the motor was detected by a laser vibrometer (> 4.5mm/s indicates bearing wear).

Replacement threshold: Winding insulation resistance < 100MΩ (measured with a 500V megohmmeter).

• The oscilloscope measures the output current waveform (a distortion rate > 5% indicates the aging of the IGBT module);
• Clean the dust on the circuit board (brush + vacuum cleaner, do not use liquids).

• The thermal imager scans the temperature rise (the casing needs to be shut down for maintenance if it exceeds 65℃).
• High-temperature grease (such as SKF LGHP2) is injected into the bearings.

• Replace the bearings (NSK, SKF brands);
• Clean the stator windings (soaked in special volatile oil);

• Replace the cooling fan (with a lifespan of approximately 20,000 hours);
• Test the capacity of the electrolytic capacitor (replace it when it decays by 20%).

• Install servo dedicated reactors (to suppress high-frequency harmonics and reduce winding heating);
• The power supply configuration of the driver is a voltage-stabilizing UPS (voltage fluctuation ≤±10%).

• Adjust the acceleration and deceleration curves (such as S-shaped curves to reduce mechanical shock);
• Hard collisions beyond the range limit are prohibited (rubber buffers should be installed).

• Reserve key spare parts: encoder modules, driver board power ics (such as Mitsubishi J2 series IPM);
• Reuse of old parts: Disassemble scrapped motors to recycle magnets and coils.

Problem: The FUJI NXTⅢ surface mount technology (SMT) machine of a certain factory frequently reports "Z-axis overload" (ERR-720).

• Measure the motor current (no-load 3.2A > standard value 2.5A);
• Disassembly revealed that the lubricating grease on the guide rail had dried up, causing the resistance to double.

• Clean the guide rails and apply fully synthetic grease;
• Calibrate the pressure of the Z-axis balance cylinder.

Result: The failure interval was prolonged from 3 days to 11 months.

Ultimate suggestion: Establish a "Drive - Motor Health File" to record each maintenance data (current/vibration/temperature rise) and predict faults through trends!