From 1aee0cf5263328ba18ca07015cbeea92d1a7ff98 Mon Sep 17 00:00:00 2001
From: Argo <52103738+Argolein@users.noreply.github.com>
Date: Thu, 5 Feb 2026 11:18:59 +0100
Subject: [PATCH] AMS Filament sync fix for locked Tool 1 & 2 (#12180)

Toolchanger printers with 4 tools were incorrectly treated as dual-nozzle (IDEX-style) printers in AMS Sync. So I was locked to just tool 1/2.

Adjusted AMS Sync to use dual-nozzle logic only for true 2-nozzle setups (nozzle_nums == 2 and filament_map in {1,2}), and route 3+ tool toolchangers through the generic mapping flow so all tool IDs are handled correctly.

Before:
<img width="2276" height="1738" alt="image" src="https://github.com/user-attachments/assets/ccebc020-37cf-4af6-8568-a9f331f6c08c" />

After:
<img width="2236" height="1662" alt="image" src="https://github.com/user-attachments/assets/030f49c3-463d-4355-95ba-ba8f95a01ecd" />

Tested on / with:
- Snamaker U1
- ARM macOS
---
 src/slic3r/GUI/SyncAmsInfoDialog.cpp | 31 +++++++++++++++++++++-------
 1 file changed, 24 insertions(+), 7 deletions(-)

diff --git a/src/slic3r/GUI/SyncAmsInfoDialog.cpp b/src/slic3r/GUI/SyncAmsInfoDialog.cpp
index b9a9135502..49f75d23d1 100644
--- a/src/slic3r/GUI/SyncAmsInfoDialog.cpp
+++ b/src/slic3r/GUI/SyncAmsInfoDialog.cpp
@@ -222,8 +222,27 @@ bool SyncAmsInfoDialog::get_is_double_extruder()
 {
     const auto &full_config = wxGetApp().preset_bundle->full_config();
     size_t      nozzle_nums = full_config.option<ConfigOptionFloats>("nozzle_diameter")->values.size();
-    bool use_double_extruder = nozzle_nums > 1 ? true : false;
-    return use_double_extruder;
+    // This dialog has dedicated left/right layout logic only for true 2-nozzle printers.
+    // For toolchangers with 3+ tools (or any filament_map beyond {1,2}),
+    // fall back to the generic list flow so all tools are shown.
+    if (nozzle_nums != 2)
+        return false;
+
+    auto *plater = wxGetApp().plater();
+    if (!plater)
+        return true;
+    auto *plate = plater->get_partplate_list().get_curr_plate();
+    if (!plate)
+        return true;
+
+    const auto &project_config = wxGetApp().preset_bundle->project_config;
+    auto         filament_maps = plate->get_real_filament_maps(project_config);
+    for (int map_id : filament_maps) {
+        if (map_id != 1 && map_id != 2) {
+            return false;
+        }
+    }
+    return true;
 }
 
 bool SyncAmsInfoDialog::is_dirty_filament() {
@@ -2386,7 +2405,7 @@ void SyncAmsInfoDialog::update_show_status()
     size_t      nozzle_nums = full_config.option<ConfigOptionFloats>("nozzle_diameter")->values.size();
 
     // the nozzle type of preset and machine are different
-    if (nozzle_nums > 1) {
+    if (get_is_double_extruder()) {
          wxString error_message;
         if (!is_nozzle_type_match(*obj_->GetExtderSystem(), error_message)) {
             std::vector<wxString> params{error_message};
@@ -2721,9 +2740,7 @@ void SyncAmsInfoDialog::reset_and_sync_ams_list()
             DeviceManager *dev_manager = Slic3r::GUI::wxGetApp().getDeviceManager();
             if (!dev_manager) return;
             MachineObject *obj_        = dev_manager->get_selected_machine();
-            const auto &   full_config = wxGetApp().preset_bundle->full_config();
-            size_t         nozzle_nums = full_config.option<ConfigOptionFloats>("nozzle_diameter")->values.size();
-            if (nozzle_nums > 1) {
+            if (get_is_double_extruder()) {
                 m_mapping_popup.set_show_type(ShowType::LEFT_AND_RIGHT);//special
             }
             // m_mapping_popup.set_show_type(ShowType::RIGHT);
@@ -3350,4 +3367,4 @@ bool FinishSyncAmsDialog::Layout()
     return true;
 }
 
-}} // namespace Slic3r
\ No newline at end of file
+}} // namespace Slic3r