diff --git a/script/optics/FrontEndBladeScan.py b/script/optics/FrontEndBladeScan.py
index 917ae7ee..933bcb04 100644
--- a/script/optics/FrontEndBladeScan.py
+++ b/script/optics/FrontEndBladeScan.py
@@ -43,13 +43,13 @@ POSITIONERS = (FrontendBladeUp)
 FrontendBladeUp.write(STARTPOS)
 FrontendBladeDown.write(-2.0)
 time.sleep(5.0)
-lscan(POSITIONERS, SENSORS, STARTPOS, ENDPOS, STEPS, LATENCY, before_read=before_readout, after_read=after_readout)
+lscan(POSITIONERS, SENSORS, STARTPOS, ENDPOS, STEPS, LATENCY, before_read=trig, after_read=after_readout)
 
 POSITIONERS = (FrontendBladeDown)
 FrontendBladeDown.write(STARTPOS)
 FrontendBladeUp.write(+2.0)
 time.sleep(5.0)
-lscan(POSITIONERS, SENSORS, STARTPOS, ENDPOS, STEPS, LATENCY, before_read=before_readout, after_read=after_readout)
+lscan(POSITIONERS, SENSORS, STARTPOS, ENDPOS, STEPS, LATENCY, before_read=trig, after_read=after_readout)
 
 FrontendHSize.write(2.0)
 FrontendVSize.write(2.0)
@@ -63,13 +63,13 @@ POSITIONERS = (FrontendBladeRing)
 FrontendBladeRing.write(STARTPOS)
 FrontendBladeWall.write(-4.0)
 time.sleep(5.0)
-lscan(POSITIONERS, SENSORS, STARTPOS, ENDPOS, STEPS, LATENCY, before_read=before_readout, after_read=after_readout)
+lscan(POSITIONERS, SENSORS, STARTPOS, ENDPOS, STEPS, LATENCY, before_read=trig, after_read=after_readout)
 
 POSITIONERS = (FrontendBladeWall)
 FrontendBladeWall.write(STARTPOS)
 FrontendBladeRing.write(+4.0)
 time.sleep(5.0)
-lscan(POSITIONERS, SENSORS, STARTPOS, ENDPOS, STEPS, LATENCY, before_read=before_readout, after_read=after_readout)
+lscan(POSITIONERS, SENSORS, STARTPOS, ENDPOS, STEPS, LATENCY, before_read=trig, after_read=after_readout)
 
 FrontendHSize.write(0.0)
 FrontendVSize.write(0.0)