diff --git a/gui/labrobot.py b/gui/labrobot.py
index 11d0a61..5f68d56 100644
--- a/gui/labrobot.py
+++ b/gui/labrobot.py
@@ -40,7 +40,7 @@ class LabPip(LabPis):
         return f'<G1 P{self.e} F{self.fe}>\n'
     
     def sendXYZ(self):
-        return f'<G1 X{self.x} X{self.y} Z{self.z} F{self.fe}>\n'
+        return f'<G1 X{self.x} Y{self.y} Z{self.z} F{self.fe}>\n'
 
     def go_top(self):
         self.e=self.top
@@ -58,13 +58,19 @@ class LabPip(LabPis):
         
 
 class LabPipBlock():
-    """ Pipettenblock description"""
+    """ Pipettenblock description 
+            x_offset, y_offset of first tip,
+            z for take a tip,
+            number of rows and columns,
+            deltax,deltay space between first and last tips
+            """
 
     def __init__(self,xoffset,yoffset,z,anz,rows,deltax,deltay):
         self.xoffset = xoffset
         self.yoffset = yoffset
         self.anz = anz
         self.rows = rows
+        self.columns = anz / rows
         self.deltax = deltax
         self.deltay = deltay
         self.z = z
@@ -78,26 +84,19 @@ class LabPipBlock():
             m = self.akt % r    # column
             c = self.akt // r   # row
             self.akt += 1
-            x = self.xoffset - (m * self.deltax)
-            y = self.yoffset - (c * self.deltax)
+            x = self.xoffset + (m * self.deltax/self.columns)
+            y = self.yoffset + (c * self.deltay/self.rows)
             return x,y,self.z
 
     
 
 #Job 100myl of A in Vial 1
-v1 = LabPis(200,200,100,21)
-a1 = LabPis(100,100,100,1)
-p1 = LabPis()
-
-lpb = LabPipBlock(200,200,100,20,5,8,10)
-
-#for n in range(22):
-#   print (lpb.next())
-
-pip = LabPip(vol=500)
-pip.fe =5000
-#print(pip)
-
-print(pip.get_tip(lpb.next()))
-#print(pip.up())
-print(pip)
+#v1 = LabPis(200,200,100,21)
+#a1 = LabPis(100,100,100,1)
+#p1 = LabPis()
+if __name__ == '__main__':
+    lpb = LabPipBlock(16,1,78,20,5,116,86)
+    pip = LabPip(vol=500)
+    pip.fe =5000
+    for i in range(20):
+        print(pip.get_tip(lpb.next()))