diff --git a/docs/group_assignments/group2/assignment3.md b/docs/group_assignments/group2/assignment3.md
index 37b7463ac453571732f7f6f48c314c70e78c957b..a86f5055f817f24abc99f500ceee8a7c4be9c135 100644
--- a/docs/group_assignments/group2/assignment3.md
+++ b/docs/group_assignments/group2/assignment3.md
@@ -11,22 +11,9 @@ authors:
url: https://fabacademy.org/2023/labs/oulu/students/aarne-pohjonen/
---
-# 1 Heading 1st level. Not title.
-
-## 2nd level heading
-[University of Oulu](http://www.oulu.fi)
-
-
-
-## Another 2nd level heading
-
-This is a body for test2. Here continues the test.
-
-### Third heading
-
-# 2 Heading 1st level.
-
+# Group work for week 3
+## Cutting a test piece and measuring the dimensions
drawing:
20x20
@@ -34,8 +21,10 @@ measurements:
19.75x19.90
thickness 2.85
+## Testing to change the focus of the laser cutter
+
We tested the change the focus of the laser cutter. First we set the optimal focal point using a tool with the laser cutter.
-We changed the foucus 1 mm above and below the optimal focal point, and also 4 mm above and below the optimal focal point.
+We changed the focus 1 mm above and below the optimal focal point, and also 4 mm above and below the optimal focal point.
The results are shown in the Figure 1. We first used settings for MDF material but later we realized that the material was
actually HDF, and we changed the settings. As can be seen from Figure 1, the difference...
@@ -57,6 +46,9 @@ Schematic figure
As shown in the schematic figure, when the focus is above the laser need to burn more material,
the energy is deposited to larger volume. This is probably the reason that the 4mm above did not cut.
+
+## Testing the effect of laser cutting speed and power
+
We tested the effect of laser cutting speed and power on the cut. We set different values for different squares. The result
is shown in the following figure. We used RGB codes to control the speed and power.
@@ -65,13 +57,13 @@ figure on the cut squares
We could see that for fastest cutting speed (S30) the laser was not able to cut through, even if the power was highest (P100).
Also, for the lowest power (P20) the laser was not able to cut through, even if the cutting speed was the slowest (S12).
-Engravings and contast
+
+## Engravings and contrast of raster images
Figure on engravings and contrast.
Raster settings were applied. Default power in the figure is 100, and default speed is 80.
-
Effect of Dots Per Inch (DPI) setting on laser engraving.
We tried to make engraving with different DPI settings. In a first attempt there was something wrong with the laser focus,
@@ -87,8 +79,7 @@ Figure of the second engravings
With more dots per inch, there is more energy deposited per line length, and for this reason the material is burned more with
higher DPI setting. The power was set to 100 and the speed was set to 18.
-
-Parametric design
+## Parametric design
Test cut without considering kerf. We cut several test pieces, ones with chamfer and ones without.
When kerf was not taken in to account, the connection was loose, and the pieces did not stick well to each other.
@@ -97,7 +88,7 @@ Then we cut pieces, where the kerf was taken in to account. We used the value fo
kerf based on the measurements we made first in the group work. In these cases the pieces were well attached. It was even
difficult to push the pieces together. The reason for this was that the material that we cut was thicker than the one we initially measured.
-Figur of our parts
+Figure of our parts
We tested with the pieces, where the correct thickness was used in the design. For one pair, the kerf was not taken in to
account in the other part, and it was loose. For the other pair the kerf was correctly taken in to account, and the connection
@@ -105,3 +96,17 @@ was good.
Figure of the ready made parts
+mkdocs formatting examples (remove in the end):
+
+# 1st level heading
+
+## 2nd level heading
+[University of Oulu](http://www.oulu.fi)
+
+
+
+## Another 2nd level heading
+
+This is a body for test2. Here continues the test.
+
+### Third heading