diff --git a/BlockStackApp.py b/BlockStackApp.py
index ea24ee5..b03260a 100644
--- a/BlockStackApp.py
+++ b/BlockStackApp.py
@@ -217,7 +217,7 @@ class BlockStackApp(QWidget):
             worker.data_list.append((ts, dial_number, position_value, diameter_value))
 
             # push data to graph and update it
-            self.update_graph(worker, dial_number, diameter_value)
+            self.update_graph(worker, dial_number, diameter_value, position_value)
             
             # calculate and display average diameter
             if is_running:
@@ -230,7 +230,7 @@ class BlockStackApp(QWidget):
             worker.block.wht_label.setText(f"{est_wgh/1000:.3f} ")
 
 
-    def update_graph(self, worker, dial_number,diameter_value):
+    def update_graph(self, worker, dial_number,diameter_value,position_value):
     # def update_graph(self, worker, dial_number, diameter_value, diameter_value2, diameter_value3):
         
 
@@ -255,15 +255,15 @@ class BlockStackApp(QWidget):
         # Append new data points
         match dial_number:
             case 0:
-                x_data1.append(len(x_data1))
+                x_data1.append(position_value)
                 y_data1.append(diameter_value)
                 worker.diameter_value1 = diameter_value
             case 1:
-                x_data2.append(len(x_data2))
+                x_data2.append(position_value)
                 y_data2.append(diameter_value)
                 worker.diameter_value2 = diameter_value
             case 2:
-                x_data3.append(len(x_data3))
+                x_data3.append(position_value)
                 y_data3.append(diameter_value)
                 worker.diameter_value3 = diameter_value
 
@@ -292,19 +292,18 @@ class BlockStackApp(QWidget):
             diameter_avg = sum(all_y_data) / len(all_y_data) if all_y_data else 0
             worker.block.avg_label.setText(f"{diameter_avg:.4f}")
 
-        # worker running, trim number of values to keep graph aligned
-        else:
-            nvalues = min(len(y_data1), len(y_data2), len(y_data3)) + 1
+        # # worker running, trim number of values to keep graph aligned
+        # else:
+        #     nvalues = min(len(y_data1), len(y_data2), len(y_data3)) + 1
 
-            # if len(y_data1) > 200:
-            y_data1 = y_data1[-nvalues:]
-            y_data2 = y_data2[-nvalues:]
-            y_data3 = y_data3[-nvalues:]
+        #     y_data1 = y_data1[-nvalues:]
+        #     y_data2 = y_data2[-nvalues:]
+        #     y_data3 = y_data3[-nvalues:]
 
-            # Update x-axis values to reflect the rolling window
-            x_data1 = list(range(len(y_data1)))
-            x_data2 = list(range(len(y_data2)))
-            x_data3 = list(range(len(y_data3)))
+        #     # Update x-axis values to reflect the rolling window
+        #     x_data1 = list(range(len(y_data1)))
+        #     x_data2 = list(range(len(y_data2)))
+        #     x_data3 = list(range(len(y_data3)))
 
 
         diameter_calc = worker.diameter_value1
diff --git a/UpdateWorker.py b/UpdateWorker.py
index 9d465af..84f8cbd 100644
--- a/UpdateWorker.py
+++ b/UpdateWorker.py
@@ -102,7 +102,9 @@ class UpdateWorker(QThread):
 
                                     print(f"position: {self.position_value} diameter: {self.diameter_value}")
 
-                                    if (self.position_value > 200) and ((1.65 < self.diameter_value) and (self.diameter_value < 1.85)) or ((2.70 < self.diameter_value) and (self.diameter_value < 2.95)):
+                                    if (self.position_value > 200) and \
+                                        ((1.60 < self.diameter_min) and (self.diameter_max < 1.90)) or \
+                                            ((2.60 < self.diameter_min) and (self.diameter_max < 2.95)):
 
                                         self.prepare_ok = True
                                         print(f"preparation VALID")