I bought an Ender 3, and after assembling it following the description and some YouTube videos and after correct leveling, I printed the test dog gcode on the micro SD card that comes with the printer. PLA 1.75 mm. Attached the image of the printing result. What went wrong? I didn't change or modify any settings what so ever, I just assembled the printer, and printed the test dog. Please help me, I am a beginner in 3D printing.
This is an extreme case of repeated layer shifting in the Y-carriage, which can come from some pieces related to the carriage. Luckily for you, they are easily fixable.
- The Ender3 Y-carriage has an eccentric nut to adjust the force the wheels press down on the V-slot. Adjust it (most likely loosen them a little) so it moves smoothly when the motors are off, but keep it tight enough so it does not tilt.
- The belt in the Y-carriage might be loose. Tighten it till it gives a nice ring when struck.
- Check if the gear on the Y-motor is tightened down correctly. If it slips or wriggles, the backlash results in the layers shifting.
- The Ender3 has the cables to the gantry and the bed running across each other and quite open. Make sure nothing can be caught in them.
- Make sure the gantry is parallel to the bed and stays so in moving upwards - adjust the wheels as needed.
- To ensure this, make sure the lead screw is orthogonal to the gantry. Level the bed afterwards. You might need to adjust the motor mount, possibly by shimming.