Start with a carriage and a destination
A PLC can turn on an output in one scan. Moving a carriage to a fixture takes many scans, a defined coordinate and a drive that can follow the requested dynamics. PLCopen motion blocks give that operation a lifecycle: the request is accepted, runs, finishes or reports why it did not finish.
The chapters begin with the command path and the evidence supplied by an encoder. From there, work through scaling, axis states and the difference between asking for motion and owning a motion command. Those basics explain a surprising number of commissioning problems: an axis that is stationary but locked, a target changed after acceptance, or a successful move that never transferred its product.
The machine examples use a horizontal screw-driven carriage, a strip feeder, a packaging jaw and an XY gantry. Their requirements differ. A fixture needs an absolute coordinate. A feeder may need an increment tied to a registration mark. A jaw follows a cam, and a dispenser needs a path rather than two unrelated axis endpoints. Choosing a block starts with that requirement.
From single-axis commands to a machine sequence
The middle chapters cover velocity, acceleration, braking, jerk, Halt, Stop and queued operations. Calculate the requested profile before expecting a short stroke to reach full speed. Follow command outcomes before allowing the machine to advance. Homing and registration then establish how a coordinate becomes connected to a physical datum or a product event.
Later chapters examine gearing, electronic cams and coordinated groups. A ratio or cam table produces a demand, but the motor still has torque, speed and thermal limits. The sizing and diagnostics chapters connect those demands to mechanics, following error and a recoverable machine sequence.
What each bench can establish
The single-axis bench uses TryPLC's existing motion runtime. Its commands are real runtime operations with target latching, axis ownership, Aborting behavior and a Stop lock. Step one scan to inspect an event or run scans to watch travel. Its model has no physical drive faults, end stops or sensor-based homing sequence, and its outputs do not reproduce every vendor timing detail.
The scaling, profile, gear/cam, path and sizing benches are analytic teaching models. They make calculations inspectable without claiming to execute unsupported PLCopen blocks. Buffering, gear engagement, cam selection, group ownership and hardware capture need lifecycle tests in the chosen vendor runtime.
Every chapter includes machine reasoning exercises and two checked questions. Local progress records reading and passed checks separately. Completing a quiz is evidence that you answered those questions; it is not a commissioning qualification.
Ordinary motion logic is not a safety function. Before working on physical equipment, use the machine's risk-assessed safety arrangement, current manufacturer documentation and approved validation procedures. The final chapter asks you to document those boundaries alongside the transfer-cell sequence.