diff --git a/script/RefocusYRotScan.py b/script/RefocusYRotScan.py
index 077171f2..c759386e 100644
--- a/script/RefocusYRotScan.py
+++ b/script/RefocusYRotScan.py
@@ -8,8 +8,8 @@ set analyser parameters separately!
 import math
 
 # adjust the following parameters
-DISTANCE = 0.1
-STEPS = 20
+DISTANCE = 0.2
+STEPS = 0.005
 LATENCY = 0.5
 ENDSCAN = False
 
@@ -24,8 +24,8 @@ set_adc_averaging()
 
 def trig_sensors():
     wait_beam()
-    trig_scienta()
     caput("X03DA-OP-10ADC:TRG.PROC", 1)
+    trig_scienta()
     
 try:
     lscan(MOTORS, SENSORS, STARTPOS, ENDPOS, STEPS, LATENCY, RELATIVE, before_read=trig_sensors, after_read = after_readout)