Q: My 3D printer works stuttered, how to fix?
A: The problem should come from the whole platform you have built, which isnt falt enough. Hereby I have prepared pictures, should be helpful for my explanation. you didnt make the Part 1 & Part 2 at the same height, inbalance would cause as your video shows. You can use a vernier calipers for precise measurement.
For example, if you find Part 1 is higher than Part 2, you can hold Part 3, and dont let it move. At the same time, rotate Part 4 to reach the same height.
Also there is a rough way for testing, there is a Spirit level coming with the package. You can watch it and make sure the bubble is in the middle.
