diff --git a/gui/src/aaregui/panels/smart_rotation_panel.py b/gui/src/aaregui/panels/smart_rotation_panel.py
index 1963c37c..ef10b249 100644
--- a/gui/src/aaregui/panels/smart_rotation_panel.py
+++ b/gui/src/aaregui/panels/smart_rotation_panel.py
@@ -340,9 +340,7 @@ class SimpleRotationSettingsPanel(QWidget):
 
         #logger.debug("updated labels")
         self._prev_params = self.parameters
-        if self._prev_params != self.parameters:
-            self.parameters_changed.emit(self.parameters)
-            logger.debug("emitted parameters")
+        self.parameters_changed.emit(self.parameters)
 
     @Slot()
     def run_measurement(self):
diff --git a/gui/src/aaregui/threads/daq_worker.py b/gui/src/aaregui/threads/daq_worker.py
index 6d3ac630..16f4aeeb 100644
--- a/gui/src/aaregui/threads/daq_worker.py
+++ b/gui/src/aaregui/threads/daq_worker.py
@@ -54,6 +54,13 @@ class DAQWorker(QObject):
         self._status_request_min_interval = 10.0
         self._last_status_error = None
 
+        self._last_smart_params_json: str | None = None
+        self._smart_params_debounce = QTimer(self)
+        self._smart_params_debounce.setInterval(400)  # ms
+        self._smart_params_debounce.setSingleShot(True)
+        self._smart_params_pending: str | None = None
+        self._smart_params_debounce.timeout.connect(self._flush_smart_params)
+
     @Slot()
     def regular_update(self):
         if self.__counter % SPREADHSEET_FREQUENCY == 0:
@@ -412,12 +419,25 @@ class DAQWorker(QObject):
         reply = self.__net_manager.post(request, QByteArray(body.encode("utf-8")))
         reply.finished.connect(lambda: self.handle_auto_scan_response(reply, s.db_id))
 
+    def _flush_smart_params(self):
+        body = self._smart_params_pending
+        if body is None:
+            return
+        if body == self._last_smart_params_json:
+            return  # no-op
+        self._last_smart_params_json = body
+        self.generic_post("scan/smart_params", body)
+        self._smart_params_pending = None
+
     @Slot(SimpleScanParameters)
     def smart_params(self, p: SimpleScanParameters):
         if self.__base_url is None:
             logger.info(f"POST /scan/smart_params: {p.model_dump_json()}")
             return
-        self.generic_post("scan/smart_params", p.model_dump_json())
+        body = p.model_dump_json()
+        # dedupe and debounce
+        self._smart_params_pending = body
+        self._smart_params_debounce.start()
 
     @Slot(Coordinate)
     def abr_tweak(self, c: Coordinate):