diff --git a/script/XAS.py b/script/XAS.py
index 5f76900e..f51468c1 100644
--- a/script/XAS.py
+++ b/script/XAS.py
@@ -5,12 +5,12 @@ XAS scan
 POSITIONERS = (Eph)
 SENSORS = (SampleCurrent, RefCurrent, AuxCurrent, AuxVoltage, MachineCurrent)
 #SENSORS = (SampleCurrent, RefCurrent, AuxCurrent, MachineCurrent, OpticsCameraCentroidX, OpticsCameraSigmaX)
-STARTPOS = (540.0)
-ENDPOS = (550.0)
+STARTPOS = (537.0)
+ENDPOS = (547.0)
 #NUMPOINTS = 76
-STEPSIZE = 0.1
-LATENCY = 1.0
-DWELL = 1.0
+STEPSIZE = 0.05
+LATENCY = 0.5
+DWELL = 2.0
 ENDSCAN = False # close shutter at end
 
 value = DWELL * 10.0