linus.b
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Y axis noise normal or not?

Sep 16, 2018 10:39 am

I have put together a MK3 kiit and the Y axis has this sound resonating into the bed. Moving at full speed in silent mode:

I have no experience with smooth rods and ball bearings, I come from a modified TEVO Tarantula(tmc2100, all noctua fans etc.) and it is much quieter than the MK3. So I have to ask, is this normal?

Also the bed has a 0.18mm warp in the front right corner, is the bed carriage maybe warped, causing one bearing to be misaligned?

Image

swapsCAPS
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Re: Y axis noise normal or not?

Sep 16, 2018 12:23 pm

Hi there,

Finished my printer yesterday and I am currently investigating the exact same issue you have. I've stumbled upon this thread:
https://shop.prusa3d.com/forum/hardware ... ml#p101657
Will give it a go after I finish the current print, but I'm a bit skeptical. From what I've seen and read this is supposed to be a very quiet printer. But with every fast long Y movement it makes a terrible racket. Prints are looking great though and tolerances seem to be fine. Noise is the only issue.

Here's mine: https://photos.app.goo.gl/S2fzwrphX8kQLzHu7. Around the 14s mark there is a "long" loud Y move. And I'm also getting some fan whine.

I've contacted support already as I don't believe this is correct behavior.

linus.b
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Re: Y axis noise normal or not?

Sep 16, 2018 1:41 pm

daniel.v23 wrote:
Sep 16, 2018 12:23 pm
Hi there,

Finished my printer yesterday and I am currently investigating the exact same issue you have. I've stumbled upon this thread:
https://shop.prusa3d.com/forum/hardware ... ml#p101657
Will give it a go after I finish the current print, but I'm a bit skeptical. From what I've seen and read this is supposed to be a very quiet printer. But with every fast long Y movement it makes a terrible racket. Prints are looking great though and tolerances seem to be fine. Noise is the only issue.

Here's mine: https://photos.app.goo.gl/S2fzwrphX8kQLzHu7. Around the 14s mark there is a "long" loud Y move. And I'm also getting some fan whine.

I've contacted support already as I don't believe this is correct behavior.
I have tried aligning the rods the best I can. The fan whine is there on mine as well I think it is because marlin(the firmware) uses slow PWM to control the cooling fan, I had this on my tevo too.

swapsCAPS
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Re: Y axis noise normal or not?

Sep 16, 2018 1:51 pm

linus.b wrote:
Sep 16, 2018 1:41 pm
I have tried aligning the rods the best I can. The fan whine is there on mine as well I think it is because marlin(the firmware) uses slow PWM to control the cooling fan, I had this on my tevo too.
Yap I have too now. They were already aligned perfectly as far as I could see. Refitting them did not make any difference. I did find out my bearings are quite loose in the horizontal plane. Does yours also make a lot of noise during XYZ calibration? Don't know if that's normal.

Calibration vid: https://photos.app.goo.gl/yEYq9DRaXhPpoZWi6
Bearing play: https://photos.app.goo.gl/kSinpP7B3AcW8oF68

(Video processing is slow atm. You need to download to view in 4K)

linus.b
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Re: Y axis noise normal or not?

Sep 16, 2018 3:05 pm

swapsCAPS wrote:
Sep 16, 2018 1:51 pm

Yap I have too now. They were already aligned perfectly as far as I could see. Refitting them did not make any difference. I did find out my bearings are quite loose in the horizontal plane. Does yours also make a lot of noise during XYZ calibration? Don't know if that's normal.

Calibration vid: https://photos.app.goo.gl/yEYq9DRaXhPpoZWi6
Bearing play: https://photos.app.goo.gl/kSinpP7B3AcW8oF68

(Video processing is slow atm. You need to download to view in 4K)
Mine was also pretty loud during calibration, but I think is mostly from the stepper motors. In the second video which way are you pushing and pulling?

swapsCAPS
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Re: Y axis noise normal or not?

Sep 16, 2018 4:01 pm

linus.b wrote:
Sep 16, 2018 3:05 pm
Mine was also pretty loud during calibration, but I think is mostly from the stepper motors. In the second video which way are you pushing and pulling?
Forward and backwards using both hands in opposite direction. Twisting the bed on the horizontal plane.

linus.b
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Re: Y axis noise normal or not?

Sep 17, 2018 2:10 pm

swapsCAPS wrote:
Sep 16, 2018 4:01 pm
Forward and backwards using both hands in opposite direction. Twisting the bed on the horizontal plane.
I was in contact with support and they confirmed that this was excessive noise, I sent them a video of only moving a single bearing and told them I had ordered igus bearings. So I got a coupon code for what the bearings cost in the prusa store.

Also I printed some temporary bearings in PLA and they are super quiet. You just have to pull them back and forth on the rods as they are a little tight, after a while they heat up from the friction and get a perfect fit and will slide by their own weight.

swapsCAPS
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Re: Y axis noise normal or not?

Sep 17, 2018 6:28 pm

linus.b wrote:
Sep 17, 2018 2:10 pm
Also I printed some temporary bearings in PLA and they are super quiet. You just have to pull them back and forth on the rods as they are a little tight, after a while they heat up from the friction and get a perfect fit and will slide by their own weight.
Interesting might try this as well. Did you print any specific ones?

linus.b
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Re: Y axis noise normal or not?

Sep 18, 2018 9:52 pm

swapsCAPS wrote:
Sep 17, 2018 6:28 pm

Interesting might try this as well. Did you print any specific ones?
I printed the chamfered lm8uu from here: https://www.thingiverse.com/thing:2202854

Just remember that you can only print pla with them cause the bed will soften them if it is too hot.

linus.b
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Re: Y axis noise normal or not?

Sep 19, 2018 2:48 pm

Actually after some printing I'd advise against PLA bearings.

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