diff --git a/mods/bambu/bambu.js b/mods/bambu/bambu.js
index 5d182528..1e795f0e 100644
--- a/mods/bambu/bambu.js
+++ b/mods/bambu/bambu.js
@@ -34,6 +34,8 @@ self.kiri.load(api => {
         "White":         "#FFFFFF"
     }).map(v => `${v.substring(1)}FF`);
 
+    let local_port = 5309;
+    let local_url = `http://localhost:${local_port}`;
     let sequence_id = (Math.random() * 0xfff) | 0;
     let user_id = ((Math.random() * 0xfffffff) | 0).toString();
     let init = false;
@@ -52,7 +54,14 @@ self.kiri.load(api => {
             if (socket.ws) {
                 return;
             }
-            let ws = socket.ws = new WebSocket("/bambu");
+            let ws_url = api.onshape ? `${local_url}/bambu` : "/bambu";
+            let ws = socket.ws = new WebSocket(ws_url);
+            ws.onerror = (error) => {
+                socket.open = false;
+                socket.ws = undefined;
+                console.log({ bambu_ws_error: error });
+                ws_url = "/bambu";
+            };
             ws.onopen = () => {
                 socket.open = true;
                 socket.drain();
@@ -1279,7 +1288,7 @@ self.kiri.load(api => {
 
     function send(filename, gcode, start) {
         const spool = print_ams_select;
-        const baseUrl = '/api/bambu_send';
+        const baseUrl = api.onshape ? `${local_url}/api/bambu_send` : "/api/bambu_send";
         const url = new URL(baseUrl, window.location.origin);
         url.searchParams.append('host', host);
         url.searchParams.append('code', password);
@@ -1288,7 +1297,7 @@ self.kiri.load(api => {
         url.searchParams.append('start', start ?? false);
         url.searchParams.append('ams', spool === 'auto' && amsmap ? amsmap : spool);
 
-        const alert = api.alerts.show('Sending to Bambu Printer');
+        const alert = api.alerts.show('Sending to Bambu Printer', 120);
 
         fetch(url.toString(), {
             headers: { 'Content-Type': 'text/plain' },