When doing the Z-axis homing, the printer will calculate the touch position when the nozzle ---- or anything else --- touchs the hot bed by the 3 force sensor.
Normally, if it is the very nozzle that touches the hotbed, then the calculated position will be the same as the toolhead position, otherwise it is possible that it is not the nozzle that touch the hotbed, which may be:
lift the hotbed until its height is near the same as the excess chute, and check if the build plate has touched the surface of the excess chute:
lift the hotbed untill it near the Z slicer stopper on the left , and check if the edge of the build plate will touch the stopper:
Check the rear edge of the build plate, to see if it is too close to the inner liner the printer:
lower the hotbed, and check if there is anything on the top surface of the 3 Z slider:
In addition to checking the surface of the slider for foreign objects, in this step you will also need to check whether the Z-axis bearing is raised.
If you find the bearing is raised, please refer to the operation video below to reset the bearing. It is important to note that before following the video, please remove the hotend assembly of the tool head (click here for a guide to disassembling the hotend assembly) and then perform the operation in the video.
If you encounter any difficulties during this process, please contact after-sales service for assistance.
The purpose of this operation is to press the raised bearing back into place using the retaining block:
https://public-cdn.bblmw.com/wiki/X1/fix_bearing_up.mp4
Raised bearings are usually caused by the presence of foreign material, such as scrap, in the three holes at the bottom of the linear rods, which causes the bearing to be squeezed and raised out of place. If there is any foreign material in these holes, make sure they are thoroughly cleaned out or the failure may recur.
Clean the bottom of the printer, if the hotbed is near the bottom of the printer and has contact with the stuffs in the bottom initially, the homing process may get disrupted:
As the inner space of the XY gantry is very compact, ensure the full movement region of the X and Y sliders is clean, with no 3rd party parts or anything else being installed or placed near the slider movement region.
A1 series printers are equipped with a printing board detection function, you can refer to this wiki for details: Build plate detection | Bambu Lab Wiki
So, before printing, it is necessary to properly place the printing board on the heat bed. If this error occurs, there may be the following reasons:
1. The build plate was not placed or was placed crooked, resulting in the nozzle not touching the build plate correctly during detection;
2. Using a third-party build plate with different structures results in the nozzle not being able to touch the plate at the detection position;
The build plate detection process is shown in the following GIFs:
HMS_0300_0D00_0001_0003 The build plate is not placed properly
"The build plate is not placed properly. Please adjust it."
The error code below shares the same issue as this one:
0300-0D00-0001-0003
0300-0D00-0001-0004
0300-0D00-0001-0005
0300-0D00-0001-0006
0300-0D00-0001-0007
0300-0D00-0001-0008
0300-0D00-0001-0009
0300-0D00-0001-000A
0300-0D00-0002-0003
0300-0D00-0002-0004
0300-0D00-0002-0005
0300-0D00-0002-0006
0300-0D00-0002-0007
0300-0D00-0002-0008
0300-0D00-0002-0009
0300-0D00-0002-000A