HMS 0300-1B00-0001-0003: Heatbed Acceleration Sensor Detects Continuous Force
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HMS 0300-1B00-0001-0003 means the heatbed acceleration sensor detected unexpected continuous force, and that the sensor may be stuck or the analog front end may be broken. Continuous is the key word: a sensor reading a constant load is either pinned by something or no longer reading at all.
Start with the thing you can see, which is whether anything is physically touching it.
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Clear the area around the sensor first
Purge fragments, a cable tie tail, a stray washer: anything resting on the sensor or its lead produces exactly this complaint. A rubber bulb blower lifts loose debris out without pushing it further into the assembly, which is what a compressed blast does.
Brush the housing, do not scrape it
An anti-static brush gets dust out of the recess around the sensor without dragging grit across the board. Keep the strokes going outwards so what you dislodge leaves rather than relocates. Debris under the plate itself shows up as a force-sensor complaint, HMS 0300-0A00-0001-0003.
Free a trapped lead with the right grip
If the lead is pinched under a bracket, needle-nose pliers let you free it without pulling on the sensor body. Pulling on the body is how a stuck sensor becomes a detached one, which is a different code and a worse afternoon.
Then judge whether it is the front end
If nothing is touching it and the reading is still constant, the analog front end named in the message is the remaining candidate, and that is support territory rather than a bench fix. Say what you cleared, because they will ask.
How HMS 0300-1B00-0001-0003 differs from its siblings
A failed bond gives a weak signal — HMS 0300-1B00-0001-0001. A noisy lead gives disturbance. A constant reading means the sensor cannot move or cannot report, which is this one.
Why it is worth fixing rather than ignoring
Compensation built from a constant value is worse than none, because the machine confidently corrects for vibration that is not happening. Ringing and shifted layers follow — see layer shifting. The bed force sensors have their own version of a stuck reading in HMS 0300-0A00-0001-0001.
HMS 0300-1B00-0001-0003 FAQ
What counts as continuous force?
A reading that does not return to its resting value when the bed is still.
Can debris really cause it?
Yes, and it is the first thing to rule out because it is free.
Is the analog front end user-serviceable?
No. That part of the message points at support.
Will it stop my prints?
Not directly. It degrades vibration compensation.
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