diff --git a/pom.xml b/pom.xml
index ee4bf5d..cbf33b4 100644
--- a/pom.xml
+++ b/pom.xml
@@ -27,6 +27,12 @@
             <artifactId>jfreechart</artifactId>
             <version>1.5.3</version>
         </dependency>
+        <!-- iText for PDF generation -->
+        <dependency>
+            <groupId>com.itextpdf</groupId>
+            <artifactId>itextpdf</artifactId>
+            <version>5.5.13.3</version>
+        </dependency>
     </dependencies>
 
     <build>
diff --git a/src/main/java/com/puchdyno/DynoGUI.java b/src/main/java/com/puchdyno/DynoGUI.java
index 999f791..d3c5c0e 100644
--- a/src/main/java/com/puchdyno/DynoGUI.java
+++ b/src/main/java/com/puchdyno/DynoGUI.java
@@ -77,7 +77,7 @@ public class DynoGUI extends JFrame {
         plot.mapDatasetToRangeAxis(1, 1);
 
         NumberAxis xAxis = (NumberAxis) plot.getDomainAxis();
-        xAxis.setRange(4000.0, 12000.0);
+        xAxis.setRange(0.0, 12000.0);
         xAxis.setLabel("U/min");
 
         XYLineAndShapeRenderer renderer1 = new XYLineAndShapeRenderer();
diff --git a/src/main/java/com/puchdyno/Main.java b/src/main/java/com/puchdyno/Main.java
index 6548988..eb43705 100644
--- a/src/main/java/com/puchdyno/Main.java
+++ b/src/main/java/com/puchdyno/Main.java
@@ -15,6 +15,13 @@ import org.jfree.chart.JFreeChart;
 import java.util.ArrayList;
 import java.util.TreeMap;
 import java.util.Map;
+import com.itextpdf.text.Document;
+import com.itextpdf.text.pdf.PdfWriter;
+import com.itextpdf.text.Image;
+import com.itextpdf.text.Rectangle;
+import java.io.FileOutputStream;
+import javax.swing.filechooser.FileNameExtensionFilter;
+import java.io.File;
 
 public class Main {
 
@@ -37,7 +44,7 @@ public class Main {
 
     private static int testRpmCurrentIndex = 0;
     private static double testRpmCurrentValue = 0.0;
-    private static final double TEST_RPM_INCREMENT_STEP = 1.0; // Very small steps for extremely smooth simulation
+    private static final double TEST_RPM_INCREMENT_STEP = 100.0; // Increased for faster simulation
 
     private static java.util.List<Double> smoothRpmData;
     private static int smoothRpmDataIndex = 0;
@@ -175,7 +182,7 @@ public class Main {
         testDataExecutor = Executors.newSingleThreadScheduledExecutor();
         testDataExecutor.scheduleAtFixedRate(() -> {
             simulateSmoothRpmRun();
-        }, 0, 50, TimeUnit.MILLISECONDS); // Update RPM every 50ms
+        }, 0, 1, TimeUnit.MILLISECONDS); // Update RPM every 10ms for faster animation
     }
 
     private static void simulateSmoothRpmRun() {
@@ -197,7 +204,6 @@ public class Main {
             testDataExecutor = null;
             SwingUtilities.invokeLater(() -> {
                 dynoGUI.updateWerte(0, 0, 0); // Reset gauges
-                dynoGUI.resetChart(); // Clear chart on stop
             });
         }
     }
@@ -290,7 +296,6 @@ public class Main {
         }
         SwingUtilities.invokeLater(() -> {
             dynoGUI.updateWerte(0, 0, 0); // Reset gauges
-            dynoGUI.resetChart(); // Clear chart on stop
         });
     }
 
@@ -418,11 +423,55 @@ public class Main {
             }
         });
 
+        JButton savePdfButton = new JButton("Save as PDF");
+        savePdfButton.addActionListener(e -> saveChartAsPdf(printChartPanel));
+
         JPanel controlPanel = new JPanel();
         controlPanel.add(printButton);
+        controlPanel.add(savePdfButton);
         chartFrame.add(controlPanel, BorderLayout.SOUTH);
 
         chartFrame.setLocationRelativeTo(dynoGUI);
         chartFrame.setVisible(true);
     }
+
+    private static void saveChartAsPdf(ChartPanel chartPanel) {
+        JFileChooser fileChooser = new JFileChooser();
+        fileChooser.setDialogTitle("Save Chart as PDF");
+        fileChooser.setFileFilter(new FileNameExtensionFilter("PDF Documents (*.pdf)", "pdf"));
+
+        int userSelection = fileChooser.showSaveDialog(null);
+
+        if (userSelection == JFileChooser.APPROVE_OPTION) {
+            File fileToSave = fileChooser.getSelectedFile();
+            String filePath = fileToSave.getAbsolutePath();
+            if (!filePath.toLowerCase().endsWith(".pdf")) {
+                filePath += ".pdf";
+            }
+            File finalFile = new File(filePath);
+
+            try {
+                // Use the dimensions of the ChartPanel to create the PDF document
+                Document document = new Document(new Rectangle(chartPanel.getWidth(), chartPanel.getHeight()));
+                PdfWriter.getInstance(document, new FileOutputStream(finalFile));
+                document.open();
+
+                // Create BufferedImage from the ChartPanel's chart
+                java.awt.Image awtImage = chartPanel.getChart().createBufferedImage(chartPanel.getWidth(), chartPanel.getHeight());
+                Image pdfImage = Image.getInstance(awtImage, null);
+
+                // Scale image to fit document
+                pdfImage.scaleToFit(document.getPageSize().getWidth() - 20, document.getPageSize().getHeight() - 20); // Add some padding
+                pdfImage.setAlignment(Image.ALIGN_CENTER);
+
+                document.add(pdfImage);
+                document.close();
+
+                JOptionPane.showMessageDialog(null, "Chart saved as PDF successfully!\n" + finalFile.getAbsolutePath(), "Save Successful", JOptionPane.INFORMATION_MESSAGE);
+            } catch (Exception ex) {
+                JOptionPane.showMessageDialog(null, "Error saving chart as PDF: " + ex.getMessage(), "Save Error", JOptionPane.ERROR_MESSAGE);
+                ex.printStackTrace();
+            }
+        }
+    }
 } 
\ No newline at end of file