Troubleshooting & FAQ

Troubleshooting & FAQ

Common problems and solutions for AdamPower stepper motors and drivers.

Motor Does Not Move / No Torque

Possible causes:

• Power supply not connected or incorrect voltage
• Motor wiring incorrect or loose connections
• Driver enable signal not active
• Current settings too low

Solutions:

• Verify power supply voltage at the driver terminals
• Check motor phase wiring: Phase A to A+/A-, Phase B to B+/B-
• Ensure enable signal is properly connected (active low on most drivers)
• Check and adjust current settings on the driver

Motor Vibrates or Makes Unusual Noise

Possible causes:

• Incorrect microstep setting
• Mid-range resonance
• Loose mechanical coupling
• Driver current too high

Solutions:

• Try different microstep settings (higher microstep = smoother)
• Reduce current to match motor specifications
• Check mechanical coupling for tightness
• Use anti-resonance driver if available (ADM42H, AP57, AP42)
• Try changing operating speed to avoid resonance zone

Motor Runs Hot (Excessive Temperature)

Possible causes:

• Current set too high for motor rating
• Continuous operation at high torque
• Insufficient cooling / ventilation
• High ambient temperature

Solutions:

• Verify current settings match motor specifications
• Enable automatic current reduction (idle current reduction)
• Ensure adequate airflow around the motor
• Reduce duty cycle if possible
• Consider closed-loop operation for reduced heating

Motor Loses Steps (Position Error)

Possible causes:

• Acceleration too high
• Load exceeds motor torque
• Supply voltage too low
• Operating speed too high for available torque

Solutions:

• Reduce acceleration settings
• Increase supply voltage for better high-speed torque
• Verify load torque is within motor's torque-speed curve
• Switch to closed-loop stepper motor with encoder feedback
• Consider a larger frame size motor

Closed-Loop Motor Position Error

Possible causes:

• Encoder wiring incorrect or loose
• Encoder power supply unstable
• Driver encoder input configuration wrong

Solutions:

• Verify encoder wiring per the wiring guide
• Check 5V encoder power supply
• Ensure correct encoder line count setting in the driver (1000 lines)
• Check for electrical noise on encoder cables

RS485 Communication Failure

Possible causes:

• Wrong baud rate setting
• Incorrect node address
• Termination resistors missing
• Wiring polarity reversed

Solutions:

• Verify all devices use same baud rate (default: 115200)
• Ensure each device has a unique node address
• Add 120Ω termination resistors at both ends of the bus
• Check A/B wire polarity
• Keep cable length under 1200m total

FAQ

Q: What is the difference between open-loop and closed-loop stepper motors?

A: Open-loop stepper motors operate without position feedback — the driver sends pulses and assumes the motor follows them. Closed-loop stepper motors have an encoder that provides real-time position feedback to the driver, which can detect and correct any missed steps, providing higher reliability and better high-speed performance.

Q: Can I use a closed-loop motor with a standard open-loop driver?

A: No. Closed-loop motors require a dedicated closed-loop driver that can read the encoder signals and adjust the motor current accordingly. The motors have different electrical characteristics optimized for closed-loop control.

Q: What voltage power supply should I use?

A: As a general rule, use a supply voltage that is 8-10 times the motor's rated voltage for optimal performance. For most NEMA17 motors, 24V DC is recommended. For NEMA23 motors, 36-48V DC. For NEMA34 motors, 48-70V DC. See the Wiring Guides for specific recommendations.

Q: How do I select the right stepper motor for my application?

A: Consider:

• Required holding torque (load torque × safety factor of 1.5-2)
• Operating speed range (check torque-speed curve)
• Available space (frame size)
• Required precision (microstepping and encoder requirements)
• Power supply availability
• Communication interface requirements

Q: What is microstepping and why is it important?

A: Microstepping divides each full step into smaller increments, allowing smoother motion, finer positioning resolution, and reduced vibration and noise at low speeds. Common microstep resolutions include 1/2, 1/4, 1/8, 1/16, 1/32, 1/64, 1/128, and 1/256.

Q: How do I calculate the positioning resolution of my system?

A: Resolution = (360° / Step Angle × Microstep Ratio × Mechanical Reduction). For example, with a 1.8° motor at 1/16 microstepping: Resolution = 360° / (200 × 16) = 0.1125° per step.

Q: Can I customize the shaft or lead wires?

A: Yes. AdamPower offers customization options including shaft length, shaft diameter, single/double shaft, lead wire length, and connector type. Contact our sales team with your requirements.

Q: How do I contact technical support?

A: You can reach our technical support team via:

• WhatsApp: +86 15656775078
• Email: simon@stepping-motor.cn

Related Documentation

• Wiring & Guides - Wiring diagrams & quick start guides
• HTML Manuals - Online product manuals

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