HMS 0300-1B00-0001-0001: Heatbed Acceleration Sensor Signal Is Weak
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HMS 0300-1B00-0001-0001 means the signal of the heatbed acceleration sensor is weak, and that the sensor may have fallen off or been damaged. Fallen off is listed first for a reason: this sensor is bonded in place, and a bond that has let go is the commonest version of this fault.
It is one of the few codes where the fix is an adhesive rather than a part.
Where to buy
Look for a sensor that is loose, not missing
A sensor hanging by its wires still reports something, which is why the message says weak rather than absent. Check whether it moves under a fingertip before you conclude anything about electronics.
Re-bond it with the right tape
If it has lifted, double-sided thermal adhesive tape is what goes back on: it conducts, it survives bed temperatures, and it holds a small sensor flat. Ordinary foam tape insulates and softens, which is how a re-bonded sensor reads weakly again a week later.
Handle it with tweezers, not fingers
These sensors are small, and finger pressure on the body while the adhesive sets is how they end up at an angle. Precision tweezers let you place one flat and leave it alone.
Lift the old adhesive without levering
Plastic pry tools get under old tape without marking the bed casting or cracking the sensor. A metal screwdriver used as a lever is how a tape job becomes a sensor order. The heatbed force sensors sit in the same assembly — see HMS 0300-0A00-0001-0003.
Why HMS 0300-1B00-0001-0001 matters for print quality
This sensor is how the machine measures its own vibration to compensate for it, so a weak signal means compensation is working from poor data. Ringing and shifted layers are the symptoms — see layer shifting.
Its two neighbours
Interference on the signal wire is HMS 0300-1B00-0001-0002, and a sensor reporting constant force is HMS 0300-1B00-0001-0003. All three are about the same small part, and the message names which symptom you have.
HMS 0300-1B00-0001-0001 FAQ
Can I print without it?
You can, with vibration compensation unreliable. Expect ringing at speed.
Is normal double-sided tape good enough?
No. Use thermally conductive tape rated for the temperature.
How do I know it is damaged rather than loose?
Re-bond it properly first. If the signal stays weak, it is the part.
Does bed temperature break the bond?
Repeated heating cycles are exactly what tires an unsuitable adhesive.
LayerWalker
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