diff --git a/script/ManipulatorFlyScan.py b/script/ManipulatorFlyScan.py
index 250859c6..c9a866fe 100644
--- a/script/ManipulatorFlyScan.py
+++ b/script/ManipulatorFlyScan.py
@@ -13,7 +13,8 @@ import math
 MOTORS = (ManipulatorX)
 RANGE = (-3.3-0.5, -3.3+0.5)
 ## minimum speed 0.02, maximum speed 0.125 mm/s
-SPEED = 0.05
+STEP = 0.05
+#SPEED = 0.05
 
 #MOTORS = (ManipulatorY)
 #RANGE = (-5., +5.)
@@ -62,6 +63,8 @@ scienta_time = (time2 - time1)
 print "scienta time: ", scienta_time
 
 # time for one scan in seconds
+SPEED = STEP / scienta_time
+print "speed: ", SPEED
 fly_time = (RANGE[1] - RANGE[0]) / SPEED
 STEPS = int(fly_time / scienta_time) + 1
 print "scan time: ", fly_time