diff --git a/script/optics/FrontEndBladeScanKei.py b/script/optics/FrontEndBladeScanKei.py
index b87ebf9d..6ff55a7c 100644
--- a/script/optics/FrontEndBladeScanKei.py
+++ b/script/optics/FrontEndBladeScanKei.py
@@ -37,12 +37,12 @@ def trig():
 
 FrontendHSize.write(2.0)
 FrontendVSize.write(2.0)
-ExitSlit.write(25.0)
-caput("X03DA-PGM:ronbeta.A", -87.0)
-caput("X03DA-PGM:rontheta.A", +87.0)
 
-MonoBeta.waitValueInRange(-87.1, -86.9, 100000)
-#MonoTheta.waitValueInRange(+86.99, +87.01, 100000)
+# disabled for monochromatic beam
+#ExitSlit.write(25.0)
+#caput("X03DA-PGM:ronbeta.A", -87.0)
+#caput("X03DA-PGM:rontheta.A", +87.0)
+#MonoBeta.waitValueInRange(-87.1, -86.9, 100000)
 
 POSITIONERS = (FrontendBladeUp)
 FrontendBladeUp.write(STARTPOS)