diff --git a/script/test/FindCenter.py b/script/test/FindCenter.py
index 9369c240..29743f91 100644
--- a/script/test/FindCenter.py
+++ b/script/test/FindCenter.py
@@ -6,10 +6,11 @@ import math
 
 # --- do not edit below ---
 
-RELATIVE = True
+RELATIVE = False
 LATENCY = 0.0
 ZIGZAG = False
 ENDSCAN = False
+START_POS = 0.0
 
 adjust_sensors()
 set_adc_averaging()
@@ -23,9 +24,8 @@ print "scienta time: ", scienta_time
 
 SENSORS = (Counts, SampleCurrent, RefCurrent, MachineCurrent)
 MOTORS = ManipulatorY
-RANGE = (-5., +5.)
+RANGE = (START_POS - 5., START_POS + 5.)
 STEP = 0.2
-MOTORS.move(0.)
 
 # time for one scan in seconds
 SPEED = STEP / scienta_time
@@ -42,18 +42,15 @@ min_counts = min(readable)
 max_counts = max(readable)
 thresh = (max_counts - min_counts) / 2. + min_counts
 print "threshhold: ", thresh
-sample_positions = [pos for idx, pos in enumerate(positions) if counts[idx] >= thresh]
+sample_positions = [pos for idx, pos in enumerate(positions) if readable[idx] >= thresh]
 lo_edge = min(sample_positions)
 hi_edge = max(sample_positions)
 print "low and high edge: ", lo_edge, ", ", hi_edge
 
-MOTORS.move(lo_edge)
-RANGE = (-0.4, +0.4)
+RANGE = (hi_edge - 0.4, hi_edge + 0.4)
 STEP = 0.01
 result = cscan(MOTORS, SENSORS, RANGE[0], RANGE[1], STEPS, time=fly_time, before_read=before_readout, after_read = after_readout, check_positions = False)
 
-
-MOTORS.move(hi_edge)
-RANGE = (-0.4, +0.4)
+RANGE = (lo_edge - 0.4, lo_edge + 0.4)
 STEP = 0.01
 result = cscan(MOTORS, SENSORS, RANGE[0], RANGE[1], STEPS, time=fly_time, before_read=before_readout, after_read = after_readout, check_positions = False)