re: Ender-3 3D printer

I have the E3-V2. As all have said, make sure your homing switches are set at the proper height/place. Tons of videos on this. I run marlin firmware with manual mesh bed leveling. Multitude of hacks, upgrades etc. It was my first printer. Its not an out of the box everything works perfect setup. Its a budget printer for someone who likes to tinker and learn. Once you get it dialed in, it prints really well.