Custom Robot Servo RFQ Guide for Robotics OEM Buyers

Why the word servo needs scope control

In robotics sourcing, "servo" can mean a servo motor, a servo drive, a smart servo, or a complete integrated actuator. A useful RFQ should state which scope you need before asking for price.

If the project is still open, describe it as a full-stack custom robot servo program and list what you expect the supplier to own: motor, drive board, encoder, reducer, brake, housing, harness, firmware, calibration, and test.

Minimum RFQ data

Send these items in the first email:

• Robot application and axis role
• Servo scope: motor, drive, smart servo, integrated actuator, or full stack
• Voltage bus, continuous current, peak current, torque, speed, and duty cycle
• Mechanical envelope, shaft or hollow bore, mounting datum, connector exit, and cable route
• Encoder or feedback type
• Protocol requirement such as EtherCAT, CANopen, CAN FD, UART, PWM, or custom firmware
• Drawings, STEP files, reference models, or target BOM
• Prototype quantity, pilot quantity, annual forecast, and expected schedule

Common failure points

The most common failure is quoting a component when the buyer needs a system. A motor can meet peak torque and still fail because the drive current is wrong, the encoder signal is noisy, the housing cannot remove heat, or the gearbox backlash breaks the control loop.

The second failure is missing test ownership. For custom robot servos, define acceptance checks before sample production: torque, speed, current, temperature rise, encoder zero, backlash, noise, communication stability, and burn-in.

Faster quote path

For a fast and useful response, send your drawings and write one clear sentence:

That sentence prevents ambiguity and helps the supplier route the inquiry to the right motor, electronics, machining, and assembly teams.