docs: scaffold polisher-control foundation

docs/10-open-questions-for-cedric.md

@@ -0,0 +1,28 @@
+# Open Questions for Cédric
+
+## Table interface
+
+- Confirm KBSI-240D opto-isolated interface or replacement.
+- Confirm table encoder transport and transceiver.
+- Confirm whether the table drive or command path changes electrically.
+
+## Spindle / ODrive
+
+- Define ODrive runtime command and telemetry path; CAN 2.0B at 1 Mbps is preferred unless replaced.
+- Define command scaling for velocity, enable/disable, fault reset, and safe stop.
+- Define telemetry subset: actual RPM, drive state/error, DC bus voltage, q-axis current, motor temperature if available.
+- Export final ODrive config with release.
+- Define spindle enable/fault I/O into HOA + safety chain.
+
+## Z-axis / force actuator
+
+- Confirm SV2A-2150 torque/current command mode and scaling.
+- Confirm enable/fault wiring and Iq/current monitor path.
+- Define Z limit-switch / hard-stop wiring into safety chain.
+- Define NC 24 VDC brake coil driver and brake-engaged diagnostic feedback.
+
+## Cross-cutting
+
+- Select safety relay model.
+- Confirm KWR75B-CAN frame map, byte order, scaling, status bits, and update rate.
+- Confirm final serial/protocol wire format.