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timschneider
1ac3b466da
Print feedback on CHX 350 with a 0.8 nozzle at 0.44 mm layer height showed curling at the retraction points with the derived value of 25 s. There is no cooling headroom left to trade: fdm_filament_pla pins fan_min_speed = fan_max_speed = 100, and additional_cooling_fan_speed is inert because no Meltingplot machine enables auxiliary_fan. Minimum layer time is the only remaining lever; 35 s prints cleanly at that geometry. The cross-section rule only fixes the ratios between nozzle sizes, so this is a calibration of the PLA anchor itself: both PLA ladders are scaled by 1.5 (Extrudr 9/20/38/56/83 s, Meltingplot PLA 8/17/30/45/66 s for 0.4/0.6/0.8/1.0/1.2). The Extrudr base fan_cooling_layer_time goes 60 -> 100 so the 1.2-nozzle value stays below it. Other materials are left unchanged - only the PLA anchor has a real counter-example so far.