Sealing test: Check for no leakage of harmonic core lubricating grease.
Sensor calibration: Verify all limit and origin signals.
Vibration analysis: Use an accelerometer to measure the vibration spectrum of each joint to ensure that there are no abnormal frequencies.
Only components that have passed all tests will be released for shipment.

Why choose to renovate instead of purchasing new parts?
Comparison item: Original factory new parts, SemiGroup refurbished parts
The high price (usually thousands to tens of thousands of dollars) is about 40% to 60% of the cost of new parts
Delivery time: The original factory may stop production or require 8-12 weeks for quick replacement, 2-3 days for repair, and 4-6 weeks for maintenance
Replace all worn parts with new quality, pass functional testing, equivalent to or better than new parts
Warranty for 1 year 1 year
Environmentally friendly waste of old parts leads to waste and recycling, reducing electronic waste
For fab factories whose equipment lifespan has passed the mid-term, refurbishment and maintenance are the most cost-effective choices.
Refurbishment services for other semiconductor equipment
In addition to Lam Research harmonic drive components, SemiGroup also offers a wide range of semiconductor equipment refurbishment services, including:
5.1 Electrical and Electronic Components
Printed Circuit Board (PCB)
Servo motor and servo driver/controller/servo package
DC power supply, high-voltage power supply, customized power supply
Temperature Controller
User Interface and HMI
5.2 Mechanical Components
Robot Assemblies
Gate assemblies/slit valves
Elevator Indexer Assemblies
Lead screws and ball screws
Lifter assemblies
Gap Drive Assemblies
Arm assemblies
5.3 Vacuum and Fluid Components
Vacuum pump, vortex pump, turbo molecular pump and controller
High vacuum valve, throttle valve, pressure controller
Mass Flow Controller (MFC)
Standard and customized corrugated pipe components
Rotary Unions
5.4 Process consumables and heat exchange
Temperature control unit, heat exchanger, chiller, solid-state chiller, thermoelectric circulating chiller
CMP components, Pad Conditioner Arms
Impeller, filter
5.5 RF and Power Supply
RF generator, RF matching device
High voltage power supply
SemiGroup's technical team can provide complete disassembly, cleaning, replacement of worn parts, and functional testing services to the same standards as harmonic drive components for the above-mentioned products.
How to order quick replacement or repair services
6.1 Required Information
Equipment models (such as Lam Rainbow 2300, 2300EX, etc.)
The part number of the harmonic drive component (usually printed on the component label, such as 853-012123-004)
Fault description (position deviation, abnormal noise, alarm codes, etc.)
Expected service type: Quick replacement (in stock) or repair (out of stock)
6.2 Precautions for returning old parts
Put the old parts into the accompanying anti-static bag and shockproof packaging.
Attach RMA label and brief fault description.
Clean visible external pollutants, but do not disassemble them by yourself.
Return within 30 days to avoid deposit deduction.
6.3 Contact Information
Official website: www.semigroup.com
You can submit service requests or obtain quotes through the website.
Spare parts management and preventive replacement recommendations
To avoid prolonged downtime caused by harmonic drive faults, it is recommended that fab factories adopt the following strategies:
Establish spare parts inventory: reserve at least one quick replacement part as a cold spare. After using spare parts, immediately send the faulty parts for repair and replenish inventory.
Preventive replacement cycle: Based on the operating intensity of the equipment, the harmonic core should be replaced preventively every 2-3 years or 20000 hours.
Status monitoring: Utilize the device's built-in vibration sensor or regularly manually measure the repeatability accuracy of the end effector. Once it exceeds the specification (such as ± 0.05 mm), arrange for immediate replacement.
Maintenance contract: Sign a long-term maintenance agreement with SemiGroup and enjoy priority processing and fixed discounts.