¶ Error message
HMS_0300_0A00_0001_0002: The sensititvity of heatbed force sensor 1/2/3 is low
" The sensitivity of heat bed force sensor 1/2/3 is low. The force sensor may have detached from the strain arm. "
The error code below shows the same problem with different force sensor:
0300 0A00 0001 0002
0300 0B00 0001 0002
0300 0C00 0001 0002
¶ What it is
Before sensing the force that is applied on the hotbed, the printer with measure the sensitivity of each force sensor, after the measurement, the printer will then check if the sensitivity is normal, if not, this error message will present.
Below are the possible reasons that may make the force sensor sensitivity low
- The screw that connect the hotbed and the hotbed frame has been over-tightened;
- There is something stuck between the hotbed and the hotbed frame
- The force sensor was detached from the strain arm.
¶ Safety warning and Machine state before starting operation
Make sure the hotbed has been cooled down and the ground wire of the power plug is truely connected to the ground
¶ Troubleshooting guide
¶ step1
Check the heat bed pre-tensioning screw and nut, and see if they are over-tightened. Usaully, the depth of the screw in the nut is shown in the middle of the picture below:
¶ step2
Check the gap between the hotbed and hotbed frame near the Z-axis slider, and see if there is anything that is stuck inside:
¶ step3
After step1 and step2, retry the "Home" function and see if this error message will disappear after finishing homing.
If not, then it is possible that the force sensor is detached from the strain arm. Then the force sensor needs to be replaced, please refer to Replace the Heat bed force sensor