HMS 1A00-E000-0001-0005: Rack Blocked by a Foreign Object During Homing
LayerWalker is a participant in the Amazon Services LLC Associates Program. We may earn a commission when you buy through links on our site, at no extra cost to you.
HMS 1A00-E000-0001-0005 means a foreign object stopped the hotend rack during homing, and Bambu asks you to clear any obstructions along the rack’s movement path. The word path is doing the work here: it is telling you to inspect the whole run, not the bay the machine happened to be near.
Homing is the move that establishes where everything is, so a blockage during it stops the swap system entirely.
Where to buy
Clear the full path, with the power off
Follow the complete range of rack travel, under as well as over, and use a light at a low angle. Clear filament on a pale surface is almost invisible viewed straight on, which is why people clear a path twice and find something the second time.
Lift debris out, never sweep it
Tweezers, a pick or a magnetic retriever remove fragments cleanly. Sweeping pushes them deeper, and what they jam next is the lock rod rather than the travel. Compressed air finishes the job once the solid pieces are gone, and the same discipline applies to the lock rod channel in HMS 1A00-1200-0002-0008.
Where the debris comes from
Purging between swaps, stringing, and the remains of failed plates. A machine that swaps tools often generates it in proportion to how much it purges, which makes a look along the rack path part of routine maintenance rather than a repair. The timeout version of the same problem is HMS 1A00-1200-0002-0007.
The near-identical sibling
Bambu also reports a blocked homing move as HMS 1A00-1100-0002-0002, where the wording asks for obstructions rather than naming the path. Same fault, same fix, raised from a different routine. Its opposite number, where homing ran too far rather than stopping short, is HMS 1A00-E000-0001-0006 and points at the belt instead.
If the path is genuinely clear
Then look at tension and at the guide surfaces. A rack that drags rather than jams misses its homing target without anything being in the way, and that is a cleaning and tensioning job rather than a clearing one.
HMS 1A00-E000-0001-0005 FAQ
Can I home it by hand?
No. Clear the path and let the machine try again; moving it while powered risks the belt.
Why does it keep happening?
Debris is accumulating faster than you clear it. Make the path part of your routine.
Does it damage anything?
Stopping protects the mechanism. Forcing it past a blockage is what causes damage.
Is this the same as a timeout?
Almost. Blocked means it met a wall; timed out means it never arrived. The fix starts the same way.
LayerWalker
Print defect diagnosis, calibration procedures and parts that actually fit. Corrections welcome through the contact page.
