Closed-Loop Steppers on a Raspberry Pi 5: CL57Y + NEMA 23 + Encoders.

Planned sections

• Why open-loop steppers fail at 1m+ travel with repeated positioning.
• Driver selection rationale (CL57Y vs cheaper alternatives).
• Encoder wiring and step-loss detection.
• The Pi 5 as motion controller — limits, real-time considerations.