Place 400 grams of flour in a mound on the table.
Use your hand to form a well in the middle of the flour. You should be able to see the table at the bottom of your flour.
Crack 4 eggs into the hole in the well. Add ¼ tsp salt and 1 tsp olive oil.
Use a fork to scramble the eggs inside the flour well. As you mix, use your fork to slowly incorporate flour from the edges of the well. Slowly keep adding more flour with your fork as you stir. The egg should turn into a paste.
When the mixture is too thick to mix with a fork anymore, start kneading with your hands. Make sure to press with the heel of your hand, working the flour into the dough. (You may need to not incorporate all of the flour or add more depending on the consistency of your dough. The dough should not be sticky or crumbly. It should be a happy medium in between. If your dough is too dry, wet your fingers with some water and continue to knead the dough.)
Knead the dough for 10-15 minutes until the dough is smooth and has turned a darker yellow color. You can test if your dough is ready by pressing your finger into it. If the dough begins to bounce back instead of staying pressed in, then it is done. If it does not bounce back, continue to knead.
Form your dough into a ball and wrap in plastic wrap. Allow to rest at room temperature for about half an hour. When the dough is done resting, cut it into small sections (about 8).
Pass these sections through the pasta roller on your pasta machine. Because each pasta maker is different I cannot give the numbers of the settings, but choose a large setting, then a medium setting, and finally a small setting (on my Kitchenaid Pasta Maker, I run the pasta through the #1, then #3, then #5).
Allow rolled pasta to rest on parchment paper while you roll the other dough. Dust lightly with flour. If you are leaving the pasta on the counter for more than 5-10 minutes, cover it with a clean kitchen towel.
Once all pasta is rolled flat, change the settings on your pasta maker to the pasta cutter.
Roll the pasta through one more time to cut into fettuccine shapes.
Lay the fettuccine on the parchment/butcher’s paper again and allow to dry.
Cook as normal pasta. Homemade pasta will normally cook faster than store-bought pasta.