My H2D seems to have just started doing this. Whenever it is powered on, there is an electrical crackling/ whirling noise coming from the back. I can confirm there are no fans running. Oddly, when I move the printhead manually, the noise either increases or decreases. Is anyone else having this issue or something similar they might be able to share? I’ve put in a ticket, but honestly I’m terrified as this is less than a month old. Any ideas? Should I be worried about this?
There are many potential sources of noise in machines like this. I’d recommend first checking that all screws are properly tightened, the belts are correctly tensioned, and that no components are loosely mounted. That way, you can rule out the most common beginner-level issues.
Do you complain about the whistling ?
This sounds for me like the chopper frequency of the stepper motor.
Try to move X / Y / Z separately to find which motor causes that noise.
May be Bambulab will change the motor
If a winding in the stepper motor is not completely tight or is potted, the chopper frequency can generate noise. However, this should not be critical.
You can apply lubricating oil to the rods. For machines experiencing belt noise near the pulley edges, Bambu Lab recommends applying a small amount of grease to the top and bottom edges of the belt we used candle wax in the old days on belt edges.
Thank you for suggesting this. I cleaned the pulley with a little alcohol wipe, and it looks like the noise has been reduced. It sounds weird to me to use grease on the pulley, so I’m also waiting for the official answer from Bambo regarding the ticket I opened.
Thank you for posting this, 3D Tech.
I think I will avoid lubricating the pulleys for now since the printer is new, and it’s possible that the problem will not affect the printer itself. Still, after cleaning the pulleys, the squeak was slightly reduced, even though it’s still there.
I also found the printing quality amazing, so I want to report the problem to Bambo Lab.
I should probably be more worried about the AMS2 since it doesn’t load filaments properly. It tries and retries many times for each of the four colours.
I have cardboard filaments from Creality, so I printed the cardboard spool adapter, but it still has bed results.
They might send you new belts, but let’s hope the belts alignment is correct if that’s where the noise is originating from.
Make sure the long PTFE tube on the AMS is properly bent; if it’s not curved correctly, it could cause issues. Also, double-check that the tube is fully inserted into the rear buffer. You should be able to see the tube through the small square hole on the buffer inside the printer.
Yeah, the AMS 2 can be a bit tricky when using cardboard spools, even with rings added. Adding some weight to the center of the spool can help sometimes, or you might try printing the rings with fuzzy skin.
I haven’t tried this myself, but some users apply black electrical tape to specific cardboard spools that were causing problems, which helps them work with the Gen 1 AMS. However, it’s best to avoid drying them, as that can result in a sticky mess.
Hope you’re able to figure it out let us know what you come up with!
