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WINTFOX00 / TRIDENT-STEPPER-DECOUPLER

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Warning: D shaft from aliexpress link rattle around in bearings. #4

Closed atoomnetmarc closed 11 months ago

atoomnetmarc commented 11 months ago

Hi, maybe I was unlucky, but the shafts from the Aliexpress link are too small. They rattle around in the bearings.

'2 Round D Shaft 55x5mm (longer still OK) | https://aliexpi.com/miUU'

All shafts are about 4.95mm or 4.96mm. afbeelding

Bearing is 5mm. afbeelding

I had an old shaft laying around that measured 4.99mm and that fit just perfectly in the bearing. However, I had just 1 and it was too short.

Not really an issue for your awesome mod, just a warning for others to be aware.

WINTFOX00 commented 11 months ago

Thank you for your reports. I'm on vacation so I'll check back in a few days. Btw, about the shaft, it's probably due to the (bad) quality fluctuations from the manufacturer, the one I bought fits perfectly. You can fix it by wrapping it in a few layers of kapton tape.

HO HUYNH | Freelancer Illustrator

https://www.artstation.com/fox https://www.artstation.com/fox

On Fri, Nov 3, 2023 at 10:14 PM Marc Ketel @.***> wrote:

Hi, maybe I was unlucky, but the shafts from the Aliexpress link are too small. They rattle around in the bearings.

'2 Round D Shaft 55x5mm (longer still OK) | https://aliexpi.com/miUU'

All shafts are about 4.95mm or 4.96mm. [image: afbeelding] https://user-images.githubusercontent.com/48124268/280324457-48ea25dd-da95-4f9a-8a8b-0fa222252c46.png

Bearing is 5mm. [image: afbeelding] https://user-images.githubusercontent.com/48124268/280324572-3cbba6e3-070e-4974-b95f-27a90fc2e987.png

I had an old shaft laying around that measured 4.99mm and that fit just perfectly in the bearing. However, I had just 1 and it was too short.

Not really an issue for your awesome mod, just a warning for others to be aware.

— Reply to this email directly, view it on GitHub https://github.com/WINTFOX00/TRIDENT-STEPPER-DECOUPLER/issues/4, or unsubscribe https://github.com/notifications/unsubscribe-auth/AN7TOSQEKZR7TMDTK27QNU3YCUC4TAVCNFSM6AAAAAA64SZAU6VHI2DSMVQWIX3LMV43ASLTON2WKOZRHE3TMNBRGYZDIMQ . You are receiving this because you are subscribed to this thread.Message ID: @.***>

atoomnetmarc commented 11 months ago

I have ordered 2 pieces of German made 5mm (DIN 175 specification) round 500mm long silver steel rods and have cut them to length. They are much more close to 5mm (4.98mm). I figured that D-shaft maybe not be the best solution under tension of the belts unless they are some kind of friction fit. Round shaft are not able to rattle.

Will let you know how this work out once I mounted them. Maybe I should cut a little flat spot for the grub screw of the pulleys if they slip.

afbeelding

atoomnetmarc commented 11 months ago

I have retried the assembly with the round 5mm shafts. They do not rattle. Time will tell if I need a flat spot for the pulleys.

I measured the noise (in peak dBA) of moving the printing head from left to right and back before the mod and after the mod. Subjective there is not much difference in noise level. I noticed that my printer has noise peaks at 25, 50 and 100 mm/s.

According to my UNI-T UT353 dBA meter the average noise dropped a tiny bit from 48.5dBA to 47.3dBA.

Graph:

afbeelding

For me this issue can be closed. Switching from Aliexpress d-shaft monday morning special to German made round shaft solved the rattle.

WINTFOX00 commented 11 months ago

Hello. I just returned from vacation. Thank you very much for the feedback. I will spend time improving and fixing errors. P/s: Regarding noise level, I don't have a specialized measuring device yet, but with my printer using a 0.9 degree stepper, it almost makes the printer silent, even with 8 microstepping + no stealthchop :D Thank you again and have a nice day :D

HO HUYNH | Freelancer Illustrator

https://www.artstation.com/fox https://www.artstation.com/fox

On Thu, Nov 9, 2023 at 2:27 AM Marc Ketel @.***> wrote:

I have retried the assembly with the round 5mm shafts. They do not rattle. Time will tell if I need a flat spot for the pulleys.

I measured the noise (in peak dBA) of moving the printing head from left to right and back before the mod and after the mod. Subjective there is not much difference in noise level. I noticed that my printer has noise peaks at 25, 50 and 100 mm/s.

According to my UNI-T UT353 dBA meter the average noise dropped a tiny bit from 48.5dBA to 47.3dBA.

Graph:

[image: afbeelding] https://user-images.githubusercontent.com/48124268/281519553-5becdefc-1179-43a5-a261-73cae8c1799b.png

For me this issue can be closed. Switching from Aliexpress d-shaft monday morning special to German made round shaft solved the rattle.

— Reply to this email directly, view it on GitHub https://github.com/WINTFOX00/TRIDENT-STEPPER-DECOUPLER/issues/4#issuecomment-1802514754, or unsubscribe https://github.com/notifications/unsubscribe-auth/AN7TOSVEQDYGJFXOFG43JZDYDPMJBAVCNFSM6AAAAAA64SZAU6VHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMYTQMBSGUYTINZVGQ . You are receiving this because you commented.Message ID: @.***>