¶ What it is
Before sensing the force that is applied on the heat bed, the printer will measure the sensitivity of each force sensor, after the measurement, the printer will then check if the sensitivity of the force sensors is normal, if not, the error will presented.
Below are the possible reasons that may make the force sensor sensitivity too low
- The hardware connection between the MC board and the heat bed is off:
- The heat bed signal cable connector on the MC board side was loosened
- The heat bed signal cable was damaged;
- the Z-axis motor is malfunctioning:
- The connector of the z-axis motor is loose from the MC board;
- The Z-axis motor is burned down;
- The force sensor is malfunctioning.
¶ Safety warning and Machine state before starting operation
Make sure the heat bed has been cooled down and the ground wire of the power plug is truly connected to the ground
¶ troubleshooting guide
¶ step 0 - turn the power OFF
Turn off the printer, and disconnect the power cord.
¶ step 1 - Remove screws
Remove the 10 screws and 4 screws from the rear cover shown in the picture. There are 2 types of screws, so keep them separate and remember which ones go where.
¶ step 2 - Remove the rear cover
Remove the rear cover, and unlock the left side belt tension ports first and then the right side one, to avoid getting stuck.
¶ step 3 - check heat bed signal cable connector
As shown below, the heat bed signal cable connector is "J2613", pointed by the red arrow:
Check if each connector of each wire of the heat bed cable is loose. If it is loosened, re-insert it ;
If none of the wire connectors is loose, clean the glues around the whole connector, then re-plug the whole connector.
Then power on the printer, and try home again, to see if this error disappeared
¶ step4
If step3 does not work, then the force sensor might be broken, and need to be replaced. See "Replacing the heat bed force sensor".
¶ Error message
HMS_0300-0A00-0001-0003: The sensitivity of heatbed force sensor 1/2/3 is too low.
" The sensitivity of heatbed force sensor 1/2/3 is too low."
The error codes below show the same problem with different force sensors:
0300-0A00-0001-0003
0300-0B00-0001-0003
0300-0C00-0001-0003
¶ End Notes
We hope the detailed guide provided has been helpful and informative.
To ensure a safe and effective execution, if you have any concerns or questions about the process described in this article, we recommend submitting a Technical ticket regarding your issue. Please include a picture or video illustrating the problem, as well as any additional information related to your inquiry.