Hey fellow DIYers!
I'm having an issue with the motor unit I'm building for my all-DIY-turntable.
Currently I use a mason DCX 22 motor in an external motor unit built of alloy. The motor itself runs w/o vibrations - but it is quite noisy. I can still hear it from about 2m of distance.
So my question is: What measures can I take to reduce the noise of the motor in the motor unit? Do you know of any materials that I could use to reduce the noise?
Ideas would be gladly appreciated
Stephan
I'm having an issue with the motor unit I'm building for my all-DIY-turntable.
Currently I use a mason DCX 22 motor in an external motor unit built of alloy. The motor itself runs w/o vibrations - but it is quite noisy. I can still hear it from about 2m of distance.
So my question is: What measures can I take to reduce the noise of the motor in the motor unit? Do you know of any materials that I could use to reduce the noise?
Ideas would be gladly appreciated
Stephan
Same noise loaded and unloaded? In and outside whatever mounting you're using? I had a rummage and couldn't see any definite specifications though I did see a generic 35dba for the dcx10s. Perhaps contact Maxon and asking them noise levels you might expect, it might be you've got a faulty unit...
Something you can hear from 2m away doesn't sound ideal 🙁 Recording possible? If you can, Maxon might be able to advise based on the noise...
Some years back I purchased a used Heybrook TT2 with a motor that made quite a loud noise and the prior owner had tried all sorts of things to mask it. I stripped them out and took a closer look. Turned out it was not the motor, but a capacitor on the PSU (below the motor) that was buzzing, so I replaced it. Silence.
Something you can hear from 2m away doesn't sound ideal 🙁 Recording possible? If you can, Maxon might be able to advise based on the noise...
Some years back I purchased a used Heybrook TT2 with a motor that made quite a loud noise and the prior owner had tried all sorts of things to mask it. I stripped them out and took a closer look. Turned out it was not the motor, but a capacitor on the PSU (below the motor) that was buzzing, so I replaced it. Silence.
How long have you had the unit, it should be noise free. If a resent purchase, send it back.
Cheers
Cheers
Same noise loaded and unloaded.
I've now isolated the motor from the motor unit a bit by applying some rubber between the motor housing and the unit which dropped the noise level.
Your "Turned out it was not the motor" made me wonder. So I was looking out for other reasons.
What really made a difference was changing the way the motor unit was coupled to the plate the turntable is standing on. I've now changed it to soft rubber rings I had lying around. And guess what: It's dead silent now!!
So I'll take it from there now and see how I can improve that.
I've now isolated the motor from the motor unit a bit by applying some rubber between the motor housing and the unit which dropped the noise level.
Your "Turned out it was not the motor" made me wonder. So I was looking out for other reasons.
What really made a difference was changing the way the motor unit was coupled to the plate the turntable is standing on. I've now changed it to soft rubber rings I had lying around. And guess what: It's dead silent now!!
So I'll take it from there now and see how I can improve that.
Actually I used a quite soft composition. Still looking for a material I can use inside the motor unit to get it even quieter now.
The noise can come from the commutator if the DC motor, bearings, or rotor is not balanced properly.
I had one DCX22 (metal brushes CLL ball bearings) too, they are inherently noisy.
Mounting it with rubber is a good idea. I couldn't’ find any picture of it but you might look up how it is done in the Well Tempered Record Player.
Mounting it with rubber is a good idea. I couldn't’ find any picture of it but you might look up how it is done in the Well Tempered Record Player.
Try these I have found them to be great and sized perfect for the 22mm diameter.
https://www.ebay.co.uk/itm/33314965...RllHP1XtHq8ZFxNyFYME4njZA=|tkp:Bk9SR8ad3JzrYA
https://www.ebay.co.uk/itm/33314965...RllHP1XtHq8ZFxNyFYME4njZA=|tkp:Bk9SR8ad3JzrYA
Motors using ball bearings are almost always more noisier than motors with sinter bronze bearings !
I'm curious as to why you selected that particular alloy of steel. Making a motor pod is mostly about adding mass to dampen the motor. Add a little rubber as needed, etc. I'd venture a guess if it's sufficiently heavy and well damped the material type wouldn't matter except for looks.
BillWojo
My pod is a bit oversized, so there are a couple of cm each side of the motor body. Made a cardboard cylinder that fits snugly along the motor and filled the empty space inside the pod with a mix of expanding foam and lead granules. It is now almost impossible to hear any noise.
I was just curious as to what particular metal alloy he used. I mentioned some common alloys for no particular reason. I forgot to include the vast number of aluminum alloys though.
Ralf
Ralf, I can't exactly tell which alloy it actually is. Do you see any differences/ advantages/ disadvantages of specific alloys?
You have received a metal resonator jar. Use sound absorbing materials. Similar ones are used in cars. These are mastics, rugs.