From a1f5a1d4677558499d77b353882ea05feb03cab8 Mon Sep 17 00:00:00 2001
From: gac-x03da <gac-x03da@x03da-cons-1.psi.ch>
Date: Tue, 13 Aug 2019 15:17:39 +0200
Subject: [PATCH] Closedown

---
 script/test/FindCenter.py | 30 ++++++++++++++++++++++--------
 1 file changed, 22 insertions(+), 8 deletions(-)

diff --git a/script/test/FindCenter.py b/script/test/FindCenter.py
index 2c2ea5b6..7744f217 100644
--- a/script/test/FindCenter.py
+++ b/script/test/FindCenter.py
@@ -1,26 +1,38 @@
 """
-automated sample finder (EXPERIMENTAL)
+automated sample finder for the Y axis (TESTING)
+
+the script first runs a coarse scan to find the lower and upper edges of the sample.
+after that it runs a fine scan on either edge.
+
+set the scienta to a clear peak in fixed mode.
 """
 
 import math
 
+# estimated center of the sample
+START_POS = 0.0
+# coarse scan range = estimated size of the sample + margins
+COARSE_RANGE = 10.0
+# scienta dwell time (fixed mode)
+DWELL_TIME = 0.5
+
+
 # --- do not edit below ---
 
 RELATIVE = False
 LATENCY = 0.0
 ZIGZAG = False
 ENDSCAN = False
-START_POS = 0.0
 
 SENSORS = (Counts, SampleCurrent, RefCurrent, MachineCurrent)
 MOTORS = ManipulatorY
-RANGE = (START_POS + 5., START_POS - 5.)
+RANGE = (START_POS + COARSE_RANGE / 2., START_POS - COARSE_RANGE / 2.)
 
-Scienta.setExposure(0.5)
-scienta_time = 3.75
+Scienta.setExposure(DWELL_TIME)
+scienta_time = 3.25 + DWELL_TIME
 print "scienta time: ", scienta_time
 
-STEP = 0.2
+STEP = 0.25
 SPEED = STEP / scienta_time
 fly_time = abs(RANGE[1] - RANGE[0]) / SPEED
 STEPS = int(fly_time / scienta_time) + 1
@@ -49,7 +61,7 @@ print "lower edge, upper edge: ", lo_edge, ", ", hi_edge
 
 
 RANGE = (lo_edge - 0.4, lo_edge + 0.4)
-STEP = 0.01
+STEP = 0.025
 SPEED = STEP / scienta_time
 fly_time = abs(RANGE[1] - RANGE[0]) / SPEED
 STEPS = int(fly_time / scienta_time) + 1
@@ -62,7 +74,7 @@ cscan(MOTORS, SENSORS, RANGE[0], RANGE[1], STEPS, time=fly_time, before_read=bef
 
 
 RANGE = (hi_edge - 0.4, hi_edge + 0.4)
-STEP = 0.01
+STEP = 0.025
 SPEED = STEP / scienta_time
 fly_time = abs(RANGE[1] - RANGE[0]) / SPEED
 STEPS = int(fly_time / scienta_time) + 1
@@ -72,3 +84,5 @@ print "speed: ", SPEED
 print "scan time: ", fly_time
 
 cscan(MOTORS, SENSORS, RANGE[0], RANGE[1], STEPS, time=fly_time, before_read=before_readout, after_read = after_readout, check_positions = False)
+
+MOTORS.move((lo_edge + hi_edge) / 2)