The rear axle with the wallPen is powered, although the entrance wheels are steerable, enabling the printer to move specifically together the wall. I am the owner of 3D Printerly, a website devoted to simplifying 3D printing. Published around 900 article content and made a novice's training course. I believe https://floorprinter51605.livebloggs.com/39026892/considerations-to-know-about-wall-printer