H2S clicking noise X direction movement - help solve this issue

Bambu Lab H2 Series Troubleshooting
1

Hi Guys,
My 1 month old H2S is now making a clicking noise when it travels in X direction. I can hear the clicking several times during the travel. The clicking seems to be coming from the lower belt on left side - probably the left lower pulley/idler.

I have cleaned all rails and screws, and lubricated everything again.
I have tried many times to do the belt tensioner calibration and no success.

If sometimes the noise appears to dissapear , after i heat up the chmber to above 50°C the noise reapears and stays at all temperatures.

Does anyone know how to fix this issue?

2

My first H2D made the same noise because the bearing in the cheap pulley was defective.

H2S_pulley
H2S_pulley525Ă—358 181 KB

3

Where did you buy a new better pulley and which type did you get?

4

Just a small detail, but isn’t that the X-axis rather than the Y-axis?
I don’t have an H2S myself, but it would be highly illogical for them to reverse the coordinate system specifically on that model.

That aside, it sounds like a bearing issue or possibly some debris causing the noise. When was the last time you cleaned the printer?
As mentioned in a previous post, it could also be a faulty bearing. Try to pinpoint the source of the sound, and you’ll know where to start looking.

5

Is it the bearing in the pulley? It doesn’t necessarily have to be the one shown in the picture!

I had my H2D replaced because it had other defects.

6

My bad I’ve corrected the post. Thx for pointing out!

I’ve cleaned it immediately after i heard the noise, lubricated everything again acc to bambu specs(wiki), did the belt tension calibration at room temperature and also at 60°C chamber temperature and nothing removed the noise.

I have removed the belts from the tool head on the left side and moved the toolhead- no noise was present- this way i can say that the noise is not from the tool head.
After attaching the belts again, the noise reapeared.

I think I’ve identified the left pulley for the lower belt left side of the gantry. (visible in the video).
I have disassembled the left puleys of the moving gantry on the left , there was no debris. like I said the printer is cca 1 month old with around 230 hours on it at this moment.

I have opened a ticket but no answer yet from support.

7

In my case, BL also initially made excuses until a technician had looked at the video, and then they wanted to deliver replacement pulleys.

Persist!

8

My H2D did that on the X-axis see Video

BL wanted one video without belts and one with belts tightened.

9

Thx for sharing! So BL sent you new pulleys- good to know I am not alone in this situation.

10

The belts weren’t any good on the first h2Ds either; they caused a lot of wear on the pulleys.

I didn’t feel like repairing it anymore, because first the AP board burned out, and although I got a replacement, I repaired my old one because it all took too long. At the same time, the display had also died, so I didn’t feel like using pulleys anymore and insisted on replacing the printer.

That worked perfectly.

11

BL_resp
BL_resp1591Ă—926 47.8 KB

12

Given the quantities involved, they probably have various manufacturers for belts/pulleys, but one of them seems to supply particularly poor quality, which unfortunately detracts greatly from the good product.

Because with the replacement H2D, the belts are better and 10Hz tighter, and so far the pulleys are OK after 800 hours.

13

Glad to hear it worked for you! Thx for the info! Your first H2D was really bad.
I will have to wait and see what they reply in my case now.

14

is it common for them to answer 2-3 days after you’ve opened the ticket?

15

Yes, it can take 2-3 days to get a reply, and there’s also the long time difference to consider.

But once they are awake, it works every day. :laughing:

Perhaps it also depends on the country?

But I assume that BL is overloaded due to the many new devices. Many new devices = many problems.

16

I understand!
All I care is that I get it sorted out- it’s my first Bambulab printer and I had high hopes for it.

17

Bambu Lab’s support has really declined since I bought my first printer from them. These days, it can take quite some time before they even begin the usual routine of asking for videos, telling you to try this and that, and eventually ending up back at square one.

Hopefully, they identify the issue soon so you can get it resolved.

18

Support/quality does seem to be worse at the moment, but it’s still better than most of the competition, so we hope that BL will soon return to its former strength.
Otherwise, the overall “Apple” concept is already very good.

19

And so that your mistake doesn’t drag on forever and you get past the BL receptionist, please refer to my ticket US250704004001 :slight_smile:

1 Like
20

Thx a lot mate, I will refer to your ticket number