add units table to docs

Author: rickwierenga

docs/user_guide/_getting-started/plr-architecture.rst

@@ -12,10 +12,12 @@ PLR Architecture
 
 -------------------
 
+Table of contents
 
 .. toctree::
    :maxdepth: 3
-   :hidden:
+
+   units
 
 
 ~~~~~~~~~~~~~~~~~~~~~~~~
@@ -63,8 +65,3 @@ Integrating New Machines
 
 For detailed information on how to integrate new machiens into PLR ecosystem,
 and contribute to the PLR project, please refer to `Contributor Guide`:
-
-
--------------------
-
-ds

docs/user_guide/_getting-started/units.md

@@ -0,0 +1,14 @@
+# Default Units
+
+Unless otherwise specified, these are the units used in PyLabRobot:
+
+| Quantity           | Unit                      |
+| ------------------ | ------------------------- |
+| Length             | millimeters (mm)          |
+| Volume             | microliters (µL)          |
+| Time               | seconds (s)               |
+| Angle              | degrees (°)               |
+| Weight/Mass        | grams (g)                 |
+| Speed              | millimeters/second (mm/s) |
+| Flow Rate          | microliters/second (µL/s) |
+| Temperature        | degrees Celsius (°C)      |