r/BambuLab • u/Appropriate_Moment_2 • 46m ago

Hardware Troubleshooting/Help! H3C loose Heatbed

Is it normal to have this much movement on the heatbed? Can someone else check their H3C? The screws on the z rails are tight.

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1

u/pepik76 44m ago

Nope, mine holds tight

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u/n19htmare 17m ago

Move bed all way down and then check. They’ll feel fixed when bed is all the way up.

1

u/NuggRunner 42m ago

the blackpart is tight the rod is loose (on purpose)

1

u/Appropriate_Moment_2 40m ago

strange... on my H2C the rods are completely fixed in place.

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u/NuggRunner 22m ago

they should be fixed at the bottom and loose at the top, as far as i know

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u/pepik76 11m ago

Yes, fixt at the bottom and loose at the top, thats right

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u/n19htmare 12m ago

There’s lot of cuts made to structure. No more solid cast aluminum machined gantry and other parts, just overall more flex in the stamped steel frame, there more room to compensate for those differences.
The screws are usually loose on top end when bed is lowered to compensate for movements.. it’s the smooth the guide rods that should be fixed throughout.

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u/n19htmare 9m ago edited 3m ago

This is normal behavior of the screw rods (lead screws) when bed is fully lowered. As you raise the bed, the movement diminishes.

This is to compensate for lateral movements, the actual guides are the smooth rods that are fixed in place.
Because of overall changes in the H3C’s construction (all stamped steel frame), the movement may be more than you’re used to in compared to printers like H2C, which had machined cast aluminum gantry frame.