Puratech linear encoders are precision position‑sensing devices commonly mounted on CNC tables, pick‑and‑place machines, or industrial conveyors to provide real‑time displacement data. Common failure modes in this class include loss of signal due to cable wear, corrosion of contact pads, misalignment of the scale tape, and power supply ripple affecting the encoder driver. First‑check diagnostics: verify 24 V DC input voltage at the encoder module; inspect all wiring harnesses for frayed or broken conductors; confirm that the optical head is clean and properly aligned with the scale tape; and review any error codes from the host controller for communication or resolution issues.[oss-gpt-20b]