diff --git a/script/optics/ExitSlitYScanKei.py b/script/optics/ExitSlitYScanKei.py
index 128bc3e6..8d5fd78b 100644
--- a/script/optics/ExitSlitYScanKei.py
+++ b/script/optics/ExitSlitYScanKei.py
@@ -37,9 +37,8 @@ def trig():
     time.sleep(0.1)
     caput(KEI_DIODE + "DOTRIGGER", 1)
     caput(KEI_RMU + "DOTRIGGER", 1)
-    time.sleep(DWELL)
+    time.sleep(DWELL * 1.5)
     caput(KEI_DIODE + "DOFETCH", 1)
     caput(KEI_RMU + "DOFETCH", 1)
 
 lscan(POSITIONERS, SENSORS, STARTPOS, ENDPOS, STEPS, LATENCY, before_read=trig, after_read=after_readout)
-