Semar choice 😁🔥

[Semar]

I continue here my post
I've made my choice for the plate drive, aftre long and long read
Star whit a bdlc motor with. Hall captors, bdlc controler and lab power supply
It's was a long reflection....

[Semar]

Also a first blank assembly of the cuthead fo the measurement of the cones that i must make (sorry for my English...)
The way is long and hard, i'll make it with hope...

[Semar]

And the French vinyl player that's i've modified (seen in presentation case)
Barth rotofluid disco 2
Just removed the toanarm to let the place free for the new plate driver seen up

[Semar]

Not in peace with the motor noise
Hope the belt and silent bloc will do the job...

[Semar]

Not in peace with the motor noise
Hope the belt and silent bloc will do the job...
I think i'll try to make 1:6 or 1:5 transmission to limit the max rpm
This motor as a very high torque at slow speed and i've think this would be my friend....
https://youtu.be/s9plDX-wVxg?si=WJB7OdPGAcpbmUv3

[Semar]

Second test with an an other power supply 12v 600w (i was think thas the controller wasn't ru' on 12v but that was the + wire of the hall sensor wich was wrong wired on the controller)
It's much quiter, less torque but very less noisy...
https://youtu.be/UZB6BmJlUdk?si=PSxR6LYWmb43gm2Q
To be continued

[Semar]

For those who won't saw it, the beginning of this project...
https://www.lathetrolls.com/viewtopic.php?t=10147

[Semar]

What do you think about this please?

[farmersplow]

Hello Semar - great project!
A powerful motor is very important to ultimately achieve good results. In terms of power, the scooter motor will be absolutely sufficient. Whether the smooth running can be achieved depends on the software and the ball bearings. I think that the ball bearings are good for the road, but for the disc drive you might consider replacing them at some point. The platter doesn't have these loads on the bearings and so you can (at some point - later - later - later) replace the ball bearings with other bearings - that would make it much quieter again. But first test it as it is.
I think your project is great and I'm looking forward to further reports.
Keep up the good work!

Thomas

[Semar]

Thanks very much Thomas, i follow your project every day, step by step
I mean what you say, at this step try to make something to reach my goal, and make it better later
But make it!
Thanks very much Thomas

[farmersplow]

I mean what you say, at this step try to make something to reach my goal, and make it better later

exactly

[Semar]

I'm thinking to the next step for the cutterhead and i've just had an idea
Perhaps i'll finish by make cones with can but
What do you think about using syringe needles to make the connection between driver and torsion tube?
It's easy to stick, easy to cut at the same length and exist in many thickness, very light!
The purple one seems very good no?

[Semar]

What do you think about this?

[farmersplow]

What do you think about this?

Hello Semar,
I don't know!
In terms of weight, this stainless steel is about the same weight as the favoured phosphor bronze (~8 kg/dm³).
However, stainless steel cannot be soldered and is harder to bend (if you need to).
Aluminium is only 2.7 kg/dm³, so it is much lighter. But you also need more material for the same strength.
A combination would therefore be advantageous (aluminium for as long as possible and then phosphor bronze for the connection on the torsion tube).
Phosphor bronze is available as coil wire in all diameters.

The syringe barrel (with the bore) is probably lighter than phosphor bronze. I don't know how the stainless steel behaves with resonances. You would just have to test it.
If one end of the thin stainless steel tube is to be screwed together, then it is important to ensure that there is a crimped connection with deformation (possible breaking point)

I hope this helps you in some way.

Thomas

[Semar]

Thank you Thomas, every comment is helpful!

[Semar]

A few time to work on it today
Finally had an other idea with the syringe!
I need to adjust the length of the pieces to get the correct geometry and alignment but it's not look too bad
Actually about 3,4g so 1,7g by channel and the weight will decrease when ajustin these lengths of the pieces and make the needle as short as possible
And after that, glue the the drivers

[Semar]

[Semar]

Making the things with the materials and the tools i have...
Every build need a first version
Now realy ready tl styck

[Semar]

The stainless harm will be ajust to connect to the balance weight and also ajust the angle of the cuthead
The Cooper tube contain a rubber stamp for the torque tube connector, with hope

Go slowly, but forward...

[Semar]

Not the worth, not the best just the first test and i'll use it, peace
https://youtu.be/z1eLKUTJ1-0?si=raa2kXGbmxlrY_mp