Harmonic Drive FHA-C series flat AC servo actuator, size 32, with a hollow shaft and an integrated 100:1 gear reduction.
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Scope of service activities — What activities are performed when servicing this type of device:
INITIAL INSPECTION
11 activities
Visual condition
- Device is complete? Check whether the device is complete as a functional unit and no part needed for operation is missing.
- Previous intervention? Assessment whether the device shows traces of previous service intervention or repair.
- Mechanical damage? Visual check for mechanical damage – cracks, deformation, broken parts, etc.
- Visible contamination? Assessment of visible contamination of the device – dust, grease, operational dirt.
- Tightness Visual leak check – traces of leaked oil, lubricant, or coolant.
Handling
- Disassembly required? Determining whether disassembly of the cover, frame, or other components is required to access internal parts.
- Demanding disassembly? Assessment of whether disassembly of the device requires special tools, fixtures, or increased labor.
- Special handling needed? Assessment of whether handling requires a special procedure due to weight, size, or fragility.
Cleaning
- Cleaning required? Assessment of whether device contamination requires cleaning before diagnostics and service.
- Air blow-out Blowing dust and dirt out of internal and external parts of the device with compressed air.
- Water cleaning Cleaning the device with water – gentle removal of deposited dirt from surfaces and components.
ELECTRICAL SERVICE
12 activities
Cooling
- Active cooling - fans Inspection of fan condition and operation for active cooling of electronic components.
- Passive cooling - heatsinks, paste Heatsink, thermal paste and other passive cooling element inspection.
Insulation
- Insulation state of wires and connectors Insulation state check of wires and connectors – insulation wear, oxidation, damage.
- Conductive paths Conductivity check of PCB traces – continuity and joint resistance measurement.
Fasteners
- Connectors Connector inspection – contact state, correct seating, mechanical damage, oxidation.
- Wires Wire inspection – insulation, mechanical damage, correct wiring, cross-section.
Protections
- Fuses, thermal protections Fuse and thermal protection inspection against overload and short circuit.
Software
- Parameters Check and backup of the device operating parameters stored in memory.
- User software User software check – version, operation, application program integrity.
- Firmware Firmware check – version, compatibility, possible need for an update.
Mechanics
- Structural components Structural component check – holders, frames, cooling fins, mounting parts.
- Fasteners Fastener inspection – screws, nuts, washers, rivets – tightening and state.
MOTOR SERVICE
31 activities
Connection
- Connectors Motor connector inspection – contact state, correct seating, thermal stress.
- Wires Motor supply wire inspection – insulation, mechanical damage, cross-section, wiring.
- Commutators, brushes Commutator and brush inspection – wear, surface condition, brush pressure.
Insulation
- Insulation state winding-frame Insulation resistance measurement between winding and motor frame.
- Insulation state winding-sensors Insulation resistance measurement between winding and sensors (encoder, temperature probes).
- Insulation state sensor-frame Insulation resistance measurement between sensors and motor frame.
Cooling, lubrication
- Water cooling Motor water cooling system inspection – tightness, flow, hose and seal condition.
- Fans Motor fan inspection – blade condition, mounting, smooth running, cooling efficiency.
Bearings and seals
- Bearings Bearing inspection – play, noise, smooth running, lubricant condition.
- Shaft seals Shaft seal inspection – tightness, elasticity, wear.
Shaft, rotor
- Rotor, armature winding Rotor or armature winding check – insulation state, turn-to-turn shorts, integrity.
- Balancing Rotor balancing check – vibration, dynamic and static imbalance.
- Mechanics, magnets Rotor mechanical inspection – shaft, magnets, slots, press fit.
Stator
- Winding state - surge wave Stator winding diagnostics with surge wave – detection of turn and phase short circuits.
Sensors
- Encoders, resolvers Encoder and resolver inspection – position sensing accuracy, signal quality.
- Temperature probes Motor temperature probe inspection – accuracy, response to temperature changes.
Gearboxes
- Bearings Gearbox bearing inspection – play, noise, smooth running, lubricant condition.
- Oil seals Gearbox shaft seal inspection – tightness, elasticity, wear.
- Oil Gearbox oil check – quantity, contamination, top-up or replacement if needed.
- Tightness Gearbox tightness check – oil leaks through seals, joints, and venting.
Other work
- Coating, bonding Coating, bonding and other surface treatments during motor repair.
- Lubrication path renewal Renewal and lubrication of lubrication paths – bearings, guides, gears.
- Surface treatment Motor component surface treatment – corrosion protection, painting, coating.
- Replacement of out-of-tolerance components Replacement of motor components out of tolerance – worn or damaged parts.
- Other mechanical work Other mechanical work on the motor – shaft adjustment, grinding, turning, etc.
- IPxx protection condition IPxx protection rating check – condition of seals, glands, and covers protecting against dust and water.
Brakes
- Lamella Brake friction disc inspection – thickness, wear, flatness of the friction surface.
- Winding Brake winding check – insulation state, coil resistance, electromagnet operation.
- Springs Brake spring inspection – contact pressure, material fatigue, corrosion.
- Friction plates Brake friction plate inspection – wear, flatness, surface condition.
- Other mechanical parts Inspection of other brake mechanical parts – hub, carrier, air gap, fasteners.
ADDITIONAL ACTIVITIES
13 activities
Cleaning
- Chemical cleaning Chemical cleaning as part of additional activities.
- Multi-stage cleaning Multi-stage cleaning as part of additional activities.
- Ultrasound Ultrasonic cleaning as part of additional activities.
- Drying Component drying as part of additional activities.
- Sandblasting Surface sandblasting as part of additional activities.
- Degreasing Surface degreasing as part of additional activities.
Replacement
- Replacement of out-of-tolerance parts Replacement of out-of-tolerance parts – worn or damaged components.
- Replacement of covers, mechanical parts Replacement of damaged covers, frames, and other mechanical parts.
Production
- Component production Custom manufacture of replacement components when not available as spare parts.
Other work
- Coating, bonding Coating, bonding and other surface treatments during repair.
- PCB repair PCB repair – soldering, component replacement, trace repair.
- Insulation and conductive path repair Insulation and conductive path repair – insulation restoration, reconnection of broken links.
- Surface treatment Surface treatment during additional activities – protection, conservation, final finish.
OUTPUT TESTS
7 activities
Functionality
- Basic functions Basic device function test – power-on, communication, input response.
- Full test Full functional test – verification of all available functions under operating conditions.
- Complete functions Complete test of all functions including edge cases and limit values.
Load testing
- No load No-load device test – verification of open-circuit voltage and basic function.
- Thermal stress Thermal stress test – verification of operation at elevated temperature.
- Under load Device test under load – verification of power parameters under load.
- Vibration test Vibration test – verification of device durability and operation under mechanical stress.