diff --git a/jfs_main01.py b/jfs_main01.py
index 00a493a..4725da6 100644
--- a/jfs_main01.py
+++ b/jfs_main01.py
@@ -181,7 +181,7 @@ class MainWindow2( MainWindow):
                 self.ui.checkBox_3.setEnabled(True)
                 self.ui.checkBox_3.setCheckState(False)
                 self.ui.pushButton_3.setEnabled(True)
-                self.ui.pushButton_4.setEnabled(True)
+                self.ui.pushButton_4.setEnabled(False)
                 time.sleep(1)
                 self.statusBar().showMessage("Successfully connected to Rheo board.")
                 self.getFromRheo()
@@ -217,7 +217,6 @@ class MainWindow2( MainWindow):
         s = self.ui.label_26.text()[5:-2]
         x1 = int(s)
         left = x1 - xx
-
         if ( left < 10):
             self.statusBar().showMessage(f"Inject {xx} left {left} is to small !!")
             return
@@ -256,6 +255,7 @@ class MainWindow2( MainWindow):
         self.ui.pushButton_4.setEnabled(True)
 
     def sendRheo(self, sendStr):
+        #time.sleep(1)  ## functioniert leider nicht
         self.rheo_serial.flushInput()
         self.rheo_serial.write(sendStr.encode('utf-8'))
     
@@ -267,12 +267,12 @@ class MainWindow2( MainWindow):
         self.threadpool.start(thread)
 
     def getRheoVolume(self,cmd):
-        time.sleep(1)
+        time.sleep(0.1)
         self.rheo_serial.flushOutput()
         self.rheo_serial.flushInput()
         cmd = str(5)+'\r\n'
         self.rheo_serial.write(cmd.encode('utf-8'))
-        time.sleep(1)
+        time.sleep(0.1)
         cnt=0
         while True:
             cnt+=1
@@ -286,11 +286,7 @@ class MainWindow2( MainWindow):
                 pass
             if cnt > 100:       #warten bis der Motor steht und der Arduino antwortet
                 return 0
-        
-
-    
-
-    
+          
 
     def checkForStopFlow(self):
         if self.checkForStopFlow :