A very common problem found in 3D printing is that your E-Steps aren’t perfectly dialed in. This can result in little bulges or spots that are too thin. Most 3D printer manuals suggest that you check your E-steps when you begin, but the description of how to test can be a bit confusing sometimes. This quick video will walk you through how to check your E-steps. If you’re looking for more in depth information, Triffid Hunter’s calibration guide probably has the most information available not only on E-steps but most other calibration as well.