diff --git a/utils/gui/pyqt/main_window/Workers/PreProcessWorker.py b/utils/gui/pyqt/main_window/Workers/PreProcessWorker.py
index 546bf40..389d7e9 100644
--- a/utils/gui/pyqt/main_window/Workers/PreProcessWorker.py
+++ b/utils/gui/pyqt/main_window/Workers/PreProcessWorker.py
@@ -16,8 +16,10 @@ class PreProcessWorker(Worker):
 
     :param name: The name of the worker
     :param objpath: The path to the 3d object
+    :param discretisation_value: The delta z
 
     :ivar objpath: The path to the 3d object
+    :ivar deltaZ: The delta z
     :ivar progress_value: The current progress value
     :ivar progress_weight: The weight of the progress bar
     :ivar processed_obj: The signal to emit the processed object
@@ -35,8 +37,9 @@ class PreProcessWorker(Worker):
 
     def run(self):
         """
-        Pre process the object, read the file, verticalise it and normalise it
-        Emit the processed object in the processed_obj signal
+        This function is called when the thread is started.
+        It reads the file specified in the objpath, parses it, verticalises it and normalises it.
+        It then emits the processed object.
         """
         # Read the file
         self.set_status("Loading file...")