added warings for using no_collision.py and scanning.py

docs/examples.rst

@@ -214,8 +214,9 @@ Moving standard servo
 
 The following code stears the standard servo stand_data_sheet_ . First 
 to the middle position, then to the max right, then to max left and finally 
-to 45 degree.  This example is included as ``move_stand_servo.py`` in the 
-root of the git repository.
+to 45 degree (regarding reached max left and max right). See 
+:class:`lib_scanner.para_standard_servo` how to use it. This example is 
+included as ``move_stand_servo.py`` in the root of the git repository.
 
 .. code-block:: python
 
@@ -227,8 +228,7 @@ root of the git repository.
 
     pi = pigpio.pi()
 
-    servo = lib_scanner.para_standard_servo(gpio = 22, pi = pi,
-        min_pw = 600, max_pw = 2350)
+    servo = lib_scanner.para_standard_servo(pi = pi, gpio = 22)
 
     servo.middle_position()
     time.sleep(2)
@@ -248,6 +248,13 @@ The following code scans the surrounding of the robot in all five default
 angles and prints out the result. This example is included as ``scanning.py`` 
 in the root of the git repository.
 
+.. warning::
+
+    Make sure that the ``min_pw`` and ``max_pw`` values are carefully tested
+    **before** using this example, see **warning** in 
+    :class:`lib_scanner.para_standard_servo`! The default values for the 
+    created ranger object are just valid for the demo implementation!
+
 .. code-block:: python
 
     import pigpio
@@ -277,6 +284,13 @@ than 40 cm at the five default measuring angles. If not, the robot will
 drive 20 cm forward. This loop continues until it is stopped. This example 
 is included as ``no_collision.py`` in the root of the git repository.
 
+.. warning::
+
+    Make sure that the ``min_pw`` and ``max_pw`` values are carefully tested
+    **before** using this example, see **warning** in 
+    :class:`lib_scanner.para_standard_servo`! The default values for the 
+    created ranger object are just valid for the demo implementation!
+
 .. code-block:: python
 
     import time

emergency_stop.py

@@ -10,11 +10,9 @@
 
 pi = pigpio.pi()
 
-servo_l = lib_para_360_servo.write_pwm(pi = pi, gpio = gpio_l, 
-    min_pw = 1280, max_pw = 1720)
+servo_l = lib_para_360_servo.write_pwm(pi = pi, gpio = gpio_l)
 
-servo_r = lib_para_360_servo.write_pwm(pi = pi, gpio = gpio_r, 
-    min_pw = 1280, max_pw = 1720)
+servo_r = lib_para_360_servo.write_pwm(pi = pi, gpio = gpio_r)
 
 #buffer time for initializing everything
 time.sleep(1)

lib_scanner.py

@@ -324,10 +324,12 @@ class scanner:
         To this GPIO the signal wire of the servo has to be connected.
     :param int min_pw:
         Min pulsewidth, see **Warning**, carefully test the value before!
-        **Default:** 1000, taken from set_servo_pulsewidth_ .
+        **Default:** 600, tested carefully, see warning, value just valid for the 
+        demo implementation!
     :param int max_pw:
         Max pulsewidth, see **Warning**, carefully test the value before!
-        **Default:** 2000, taken from set_servo_pulsewidth_ .
+        **Default:** 2350, tested carefully, see warning, value just valid for the 
+        demo implementation!
     :param int min_degree:
         Min degree which the servo is able to move.
         **Default:** -90, taken from stand_data_sheet_ .

move_stand_servo.py

@@ -6,8 +6,7 @@
 
 pi = pigpio.pi()
 
-servo = lib_scanner.para_standard_servo(gpio = 22, pi = pi,
-    min_pw = 600, max_pw = 2350)
+servo = lib_scanner.para_standard_servo(pi = pi, gpio = 22)
 
 servo.middle_position()
 time.sleep(2)

no_collision.py

@@ -9,6 +9,16 @@
 pi = pigpio.pi()
 
 robot = lib_motion.motion(pi = pi)
+
+"""
+.. warning::
+
+    Make sure that the ``min_pw`` and ``max_pw`` values are carefully tested
+    **before** using this example, see **warning** in 
+    :class:`lib_scanner.para_standard_servo`! The default values for the 
+    created ranger object are just valid for the demo implementation!
+"""
+
 ranger = lib_scanner.scanner(pi = pi)
 
 while True:

scanning.py

@@ -4,6 +4,15 @@
 
 pi = pigpio.pi()
 
+"""
+.. warning::
+
+    Make sure that the ``min_pw`` and ``max_pw`` values are carefully tested
+    **before** using this example, see **warning** in 
+    :class:`lib_scanner.para_standard_servo`! The default values for the 
+    created ranger object are just valid for the demo implementation!
+"""
+
 ranger = lib_scanner.scanner(pi = pi)
 
 distances = ranger.read_all_angles()