¶ Error message
HMS_0300_0A00_0001_0004: External disturbance was detected when testing the force sensor
External disturbance was detected when testing the force sensor 1/2/3 sensitivity. The heatbed plate may have touched something outside the heatbed.
These error code below shows the same isue of different force sensor:
0300 0A00 0001 0004
0300 0B00 0001 0004
0300 0C00 0001 0004
¶ What it is
Before sensing the force that is applied on the heat bed, the printer with test the sensitivity of each force sensor by vibrating the hotbed up and down.
If anything touches the heat bed, the printer will get the wrong sensitivity parameters and make subsequent procedure works abnormally.
Below are the possible reasons that the printer thinks there were external disturbances occurred:
- Before Z-axis homing, the heat bed was stuck by something:
- the build plate is rubbing against the excess chute
- the build plate has contact with the inner liner of the printer
- some stuff put on the bottom of the printer has stuck to the heat bed
- When measuring the force sensor sensitivity, there are significant vibrations in the environment
- The printer is placed on an unstable platform ( like a soft mat, or loosened table )
- The heated bed signal cable connector on the MC board is loose or broken;
(Almost the same as the "the static voltage of force sensor 1/2/3 is not 0" ....)
¶ Safety warning and Machine state before starting operation
¶ Troubleshooting guide
¶ Step 1
Make sure that the printer is placed on a stable platform ( like a rigid table, or floor )
¶ Step 2
Make sure the environment has no high vibrations ( like someone is hammering nails nearby)
¶ Step 3
Lift the heated bed until it's the same height as the excess chute, and check if the build plate has rubbed against the excess chute surface:
¶ Step 4
Check the rear edge of the build plate, to see if it is too close to the inner liner of the printer:
¶ Step 5
Clean the bottom of the printer. The homing process may be disrupted if the heated bed moves downward and collides with a foreign object on the bottom:
¶ Step 6
Check whether the cable connecting the heating bed is in poor contact. You can press the cable in the back of the printer as shown below, then tap "Home" on the screen control screen to see if the error disappears.
Or you can remove the rear cover of the printer, and check if the heat bed communication cable shown below is loose. If it is loose, replug it.
Then power on the printer and try home again to see if this error goes away.
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¶ Step 7
Each time the Home function is performed, the printer checks the sensors. So you can tap "Home" once after each check to see if the HMS error has disappeared.
If it still shows this error, please contact the customer support team.