bdwidth: width only in PRINT_START

The CCD motion reading stays at 0 (actual_total_move:0), so motion mode
only produced false "Rounout" messages. ENABLE_WIDTH keeps the flow
compensation and the runout on a missing width; clogs and breaks are
left to AFC's buffer fault detection (filament_error_sensitivity).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

CLAUDE.md

@@ -12,8 +12,10 @@ Voron 2.4 350, Klipper + Moonraker + Mainsail on a Raspberry Pi 4
 toolboard (USB), Leviathan mainboard as USB-CAN bridge, bd_pressure
 (load-check firmware, branch `load-check-extension` in
 `D:\Claude\bd_pressure-load-check\bd_pressure`), bdwidth (measures width and
-motion optically with a CCD; its motion reading is unreliable, so the purge
-check runs with `motion_check: False`), iHeater chamber heater.
+motion optically with a CCD; its motion reading stays at 0, so it runs width
+only (`ENABLE_WIDTH` in PRINT_START) and the purge check runs with
+`motion_check: False`; clogs and breaks are caught by AFC's buffer fault
+detection, `filament_error_sensitivity`), iHeater chamber heater.
 
 ## Working with the printer
 

macros/print/print_start_end.cfg

@@ -203,8 +203,10 @@ gcode:
 
     _AFC_STORE_HOME_REFERENCE
 
-    SET_BDWIDTH NAME=fila_width_0 COMMAND=ENABLE_ALL
-    # SET_BDWIDTH NAME=fila_width_0 COMMAND=ENABLE_MOTION
+    # Width only (flow compensation and runout when no filament is measured).
+    # The CCD motion reading stays at 0 (actual_total_move:0), so motion mode
+    # (ENABLE_MOTION / ENABLE_ALL) only gives false "Rounout" messages.
+    SET_BDWIDTH NAME=fila_width_0 COMMAND=ENABLE_WIDTH
     
     _status_printing