diff --git a/src/applications/tkcontrollerapp.py b/src/applications/tkcontrollerapp.py
index aab2c95..d84f567 100644
--- a/src/applications/tkcontrollerapp.py
+++ b/src/applications/tkcontrollerapp.py
@@ -23,6 +23,13 @@
                     help='When true,logger level will be set to warning. Otherwise, set to "info".')
 parser.add_argument('-t', '--test', action = 'store_true',
                     help='This is for development testing.')
+parser.add_argument('-pmin', '--piezo-min-position', metavar = 'microns', default = 0, type=float,
+                    help='sets min allowed position on piezo controller.')
+parser.add_argument('-pmax', '--piezo-max-position', metavar = 'microns', default = 80, type=float,
+                    help='sets min allowed position on piezo controller.')
+parser.add_argument('-pscale', '--piezo-scale-microns-per-volt', default = 8, type=float,
+                    help='sets micron to volt scale for piezo controller.')
+
 args = parser.parse_args()
 
 logger = logging.getLogger(__name__)
@@ -204,7 +211,10 @@ def build_controller():
         controller = nipiezojenapy.PiezoControl(device_name = args.daq_name,
                                   write_channels = args.piezo_write_channels.split(','),
                                   read_channels = args.piezo_read_channels.split(','),
-                                  move_settle_time = args.settle_time)
+                                  move_settle_time = args.settle_time,
+                                  min_position = args.piezo_min_position,
+                                  max_position = args.piezo_max_position,
+                                  scale_microns_per_volt = args.piezo_scale_microns_per_volt)
     return controller
 
 def main():
diff --git a/src/nipiezojenapy/controller.py b/src/nipiezojenapy/controller.py
index fb27453..2b86856 100644
--- a/src/nipiezojenapy/controller.py
+++ b/src/nipiezojenapy/controller.py
@@ -6,9 +6,9 @@
 logger = logging.getLogger(__name__)
 
 class BaseControl:
-    def __init__(self):
-        self.minimum_allowed_position = 0.00
-        self.maximum_allowed_position = 80.0
+    def __init__(self, min_allowed_position = 0.0, max_allowed_position = 80.0):
+        self.minimum_allowed_position = min_allowed_position
+        self.maximum_allowed_position = max_allowed_position
         self.last_write_values = [0, 0, 0]
 
     def _validate_value(self, position: float) -> None:
@@ -81,7 +81,7 @@ def __init__(self, device_name: str,
                        move_settle_time: float = 0.001,
                        min_position: float = 0.0,
                        max_position: float = 80.0) -> None:
-        super().__init__()
+        super().__init__(min_allowed_position = min_position, max_allowed_position = max_position)
 
         self.device_name = device_name
         self.write_channels = write_channels