From b230a97a505f189e3505d8febc18eb5ceb9afef0 Mon Sep 17 00:00:00 2001
From: Kuzuri <39786901+KuzuriAo@users.noreply.github.com>
Date: Wed, 27 May 2026 10:29:40 -0400
Subject: [PATCH] Fix Snapmaker U1 "Print by Object" collisions (#13854)

Update Snapmaker U1 (0.4 nozzle).json

Updated Snapmaker U1 0.4 nozzle "change_filament_gcode" and "machine_end_gcode" to fix the issue of collisions when using "Print by Object"
---
 .../profiles/Snapmaker/machine/Snapmaker U1 (0.4 nozzle).json | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/resources/profiles/Snapmaker/machine/Snapmaker U1 (0.4 nozzle).json b/resources/profiles/Snapmaker/machine/Snapmaker U1 (0.4 nozzle).json
index 1ff01d474e..dce8a24be3 100644
--- a/resources/profiles/Snapmaker/machine/Snapmaker U1 (0.4 nozzle).json	
+++ b/resources/profiles/Snapmaker/machine/Snapmaker U1 (0.4 nozzle).json	
@@ -8,7 +8,7 @@
 	"printer_model": "Snapmaker U1",
 	"printer_variant": "0.4",
 	"auxiliary_fan": "1",
-	"change_filament_gcode": ";===== date: 20251213=====================\n; Change Tool[previous_extruder] -> Tool[next_extruder] (layer [layer_num])\n{\nlocal max_speed_toolchange = 350.0;\nlocal wait_for_extruder_temp = true;\nposition[2] = position[2] + 2.0;\nlocal speed_toolchange = max_speed_toolchange;\nif travel_speed < max_speed_toolchange then\n      speed_toolchange = travel_speed;\nendif\n\"G91\nG1 Z1.5 F1800\nG90\n\";\n\"G1 F\" + (speed_toolchange * 60) + \"\n\";\nif wait_for_extruder_temp and not((layer_num < 0) and (next_extruder == initial_tool)) then\n      \"\n\";\n      \"; \" + layer_num + \"\n\";\n      if layer_num == 0 then\n            \"M109 S\" + first_layer_temperature[next_extruder] + \" T\" + next_extruder + \"\n\";\n      else\n            \"M109 S\" + temperature[next_extruder] + \" T\" + next_extruder + \"\n\";\n      endif\nendif\n\"M400\" + \"\n\";\n\"T\" + next_extruder + \"\n\";\nif filament_type[next_extruder] == \"PVA\" then\n\"SET_VELOCITY_LIMIT ACCEL=3000\n\";\nelse\nendif\nif previous_extruder != next_extruder and initial_extruder != next_extruder then\n\"SM_PRINT_PREEXTRUDE_FILAMENT INDEX=\" + next_extruder + \"\n\";\nendif\n\"G90\n\";\n}\n",
+	"change_filament_gcode": ";===== date: 20260525 =====================\n; Change Tool[previous_extruder] -> Tool[next_extruder] (layer [layer_num] ; max_layer_z [max_layer_z] ; max_print_height [max_print_height])\n{\nlocal move_z = max_print_height;\nlocal max_speed_toolchange = 350.0;\nlocal wait_for_extruder_temp = true;\nposition[2] = position[2] + 2.0;\nlocal speed_toolchange = max_speed_toolchange;\nif travel_speed < max_speed_toolchange then\n      speed_toolchange = travel_speed;\nendif\n\nif max_layer_z < (max_print_height - 1) then\n    move_z = z_offset + min(max_layer_z + 2, max_print_height);\nendif\n\n\"G91\nG1 Z\" + move_z + \" F1800 ; Move nozzle just above tallest printed object\nG90\n\";\n\"G1 F\" + (speed_toolchange * 60) + \"\n\";\nif wait_for_extruder_temp and not((layer_num < 0) and (next_extruder == initial_tool)) then\n      \"\n\";\n      \"; \" + layer_num + \"\n\";\n      if layer_num == 0 then\n            \"M109 S\" + first_layer_temperature[next_extruder] + \" T\" + next_extruder + \"\n\";\n      else\n            \"M109 S\" + temperature[next_extruder] + \" T\" + next_extruder + \"\n\";\n      endif\nendif\n\"M400\" + \"\n\";\n\"T\" + next_extruder + \"\n\";\nif filament_type[next_extruder] == \"PVA\" then\n\"SET_VELOCITY_LIMIT ACCEL=3000\n\";\nelse\nendif\nif previous_extruder != next_extruder and initial_extruder != next_extruder then\n\"SM_PRINT_PREEXTRUDE_FILAMENT INDEX=\" + next_extruder + \"\n\";\nendif\n\"G90\n\";\n}\n",
 	"extruder_colour": [
 		"#FCE94F",
 		"#FCE94F",
@@ -28,7 +28,7 @@
 		"0",
 		"0"
 	],
-	"machine_end_gcode": " PRINT_END\nTIMELAPSE_STOP",
+	"machine_end_gcode": ";===== date: 20260525 =====================\n; (layer [layer_num] ; max_layer_z [max_layer_z])\n{\nlocal move_z = max_print_height;\n\nif max_layer_z < (max_print_height - 1) then\n    move_z = z_offset + min(max_layer_z + 2, max_print_height);\nendif\n\n\"G91\nG1 Z\" + move_z + \" F1800 ; Move nozzle just above tallest printed object\nG90\n; Triggering PBO Z Movement of: \" + move_z + \"\nPRINT_END\nTIMELAPSE_STOP\n\";\n}\n",
 	"machine_max_acceleration_extruding": [
 		"25000",
 		"25000"