diff --git a/Code/Mantid/Framework/PythonInterface/plugins/algorithms/sfCalculator.py b/Code/Mantid/Framework/PythonInterface/plugins/algorithms/sfCalculator.py
index e36963c10314..9ec82873c649 100644
--- a/Code/Mantid/Framework/PythonInterface/plugins/algorithms/sfCalculator.py
+++ b/Code/Mantid/Framework/PythonInterface/plugins/algorithms/sfCalculator.py
@@ -5,6 +5,7 @@
 import os.path
 import sys
 import math
+from reduction.instruments.reflectometer import wks_utility
 
 PRECISION = 0.020
 
@@ -63,6 +64,8 @@ class sfCalculator():
     y_axis_error_ratio = None
     x_axis_ratio = None
 
+    is_nexus_detector_rotated_flag = True
+
     def __init__(self, numerator=None, denominator=None,
                  tof_range=None):
 
@@ -223,8 +226,8 @@ def _calculateFinalYAxis(self, bNumerator=True):
         nexus_file_numerator = file
         print '----> loading nexus file: ' + nexus_file_numerator
         EventDataWks = LoadEventNexus(Filename=nexus_file_numerator)
-#                       OutputWorkspace='EventDataWks')
-#        mt1 = mtd['EventDataWks']
+        
+        self.is_nexus_detector_rotated_flag = wks_utility.isNexusTakeAfterRefDate(EventDataWks.getRun().getProperty('run_start').value)
 
         proton_charge = self._getProtonCharge(EventDataWks)
         print '----> rebinning '
@@ -403,33 +406,23 @@ def _createIntegratedWorkspace(self,
 #                y_error_axis[y, :] += ((InputWorkspace.readE(index)[:]) *
 #                                        (InputWorkspace.readE(index)[:]))
 
-        #case 1
-        print 'using case 1'
-        for x in range(304):
-            for y in y_range:
-                index = int(y+x*256)
-#                y_axis[y, :] += InputWorkspace.readY(index)[:]
-                y_axis[y, :] += InputWorkspace.readY(index)[:]
-                y_error_axis[y, :] += ((InputWorkspace.readE(index)[:]) *
-                                        (InputWorkspace.readE(index)[:]))
-
-##        case 2
-#        for x in range(304):
-#            for y in range(256):
-#                index = int(x+y*304)
-##                y_axis[y, :] += InputWorkspace.readY(index)[:]
-#                y_axis[y, :] += InputWorkspace.readY(index)[:]
-#                y_error_axis[y, :] += ((InputWorkspace.readE(index)[:]) *
-#                                        (InputWorkspace.readE(index)[:]))
-
-
-#        for x in range(self.alpha_pixel_nbr):
-#            for y in range(256):
-#                index = int(self.beta_pixel_nbr * x + y)
-##                y_axis[y, :] += InputWorkspace.readY(index)[:]
-#                y_axis[y, :] += InputWorkspace.readY(index)[:]
-#                y_error_axis[y, :] += ((InputWorkspace.readE(index)[:]) *
-#                                        (InputWorkspace.readE(index)[:]))
+        if self.is_nexus_detector_rotated_flag:
+            for x in range(256):
+                for y in y_range:
+                    index = int(y+x*304)
+    #                y_axis[y, :] += InputWorkspace.readY(index)[:]
+                    y_axis[y, :] += InputWorkspace.readY(index)[:]
+                    y_error_axis[y, :] += ((InputWorkspace.readE(index)[:]) *
+                                            (InputWorkspace.readE(index)[:]))
+            
+        else:
+            for x in range(304):
+                for y in y_range:
+                    index = int(y+x*256)
+    #                y_axis[y, :] += InputWorkspace.readY(index)[:]
+                    y_axis[y, :] += InputWorkspace.readY(index)[:]
+                    y_error_axis[y, :] += ((InputWorkspace.readE(index)[:]) *
+                                            (InputWorkspace.readE(index)[:]))
 
 #        #DEBUG
 #        f=open('/home/j35/myASCIIfromCode.txt','w')
@@ -539,11 +532,19 @@ def  _removeBackground(self,
         nbr_tof = len(tof_axis)-1
 
         # make big array of data
-        data = zeros((256,nbr_tof))
-        error = zeros((256,nbr_tof))
-        for x in range(256):
-            data[x,:] = InputWorkspace.readY(x)[:]
-            error[x,:] = InputWorkspace.readE(x)[:]
+        if self.is_nexus_detector_rotated_flag:
+            data = zeros((304,nbr_tof))
+            error = zeros((304,nbr_tof))
+            for x in range(304):
+                data[x,:] = InputWorkspace.readY(x)[:]
+                error[x,:] = InputWorkspace.readE(x)[:]
+
+        else:
+            data = zeros((256,nbr_tof))
+            error = zeros((256,nbr_tof))
+            for x in range(256):
+                data[x,:] = InputWorkspace.readY(x)[:]
+                error[x,:] = InputWorkspace.readE(x)[:]
 
         peak_array = zeros(nbr_tof)
         peak_array_error = zeros(nbr_tof)