Platter Materials - Page 6

YNWOAN · 14th August 2008, 12:55 PM

Just a couple of things;

Nice work by many there :-)

I've never had any problem achieving a good finish on Delrin - a slightly radiused cutter (rather than a point) makes it a lot easier though (as does exactly the right speed and feed).

I have also used the method used by Bob P. to mount items in the lathe - always worked well.

My experience of cast acrylic is also that it thickness across sheet varies significantly and all surfaces must be machined true.

Studio Au · 3rd April 2010, 02:54 PM

Hi, I managed to mess up the drilling of my cutting board 2" wooden platter.

An idea i had while searching eBay for circular 300mm diameter objects was to use disk brakes, they can be bought for around £30+/-.

They must be machined to high tolerances.?

I have tried to find out if they are they magnetic and whether this will affect the MM my cartridge?

I remember reading someone wanting to try it, but can't find the link or site it was one.

So anyone thought about it, or have any brain waves.

YNWOAN · 4th April 2010, 08:41 PM

Have you never seen a rusty disk brake?

Studio Au · 6th April 2010, 11:49 AM

So steel, and so magnetic?

Its not gonna be spinning round at 80mph in all weathers. Just at 45rpm

sq225917 · 6th April 2010, 03:37 PM

They are magnetic...

Studio Au · 6th April 2010, 03:45 PM

Does that entirely rule them out?

Can you demagnetize?

Would it still affect the stylus in there was an inch acrylic platter on top?

DaveM · 13th April 2010, 05:25 PM

I don't see what it would. That is actually a pretty interesting idea. You would need to damp the heck out of it to tame the natural ringing of steel. But talk about a cheap way to make a high mass platter.

mnemneth · 13th April 2010, 06:29 PM

Quote:

Originally Posted by YNWOAN

Have you never seen a rusty disk brake?

Every morning when I go to work.

Disc brakes are usually made of cast iron and as such are highly magnetic and rust like it's going out of season.

Sandy

6th April 2010, 03:37 PM	#55
sq225917 diyAudio Member Join Date: Jun 2004 Location: sheffield	They are magnetic... __________________ hoping to pick up some things.

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14th August 2008, 12:55 PM	#51
YNWOAN diyAudio Member Join Date: Jan 2007	Just a couple of things; Nice work by many there :-) I've never had any problem achieving a good finish on Delrin - a slightly radiused cutter (rather than a point) makes it a lot easier though (as does exactly the right speed and feed). I have also used the method used by Bob P. to mount items in the lathe - always worked well. My experience of cast acrylic is also that it thickness across sheet varies significantly and all surfaces must be machined true.

3rd April 2010, 02:54 PM	#52
Studio Au diyAudio Member Join Date: Sep 2008 Location: Bristol	Hi, I managed to mess up the drilling of my cutting board 2" wooden platter. An idea i had while searching eBay for circular 300mm diameter objects was to use disk brakes, they can be bought for around £30+/-. They must be machined to high tolerances.? I have tried to find out if they are they magnetic and whether this will affect the MM my cartridge? I remember reading someone wanting to try it, but can't find the link or site it was one. So anyone thought about it, or have any brain waves.

4th April 2010, 08:41 PM	#53
YNWOAN diyAudio Member Join Date: Jan 2007	Have you never seen a rusty disk brake?

6th April 2010, 11:49 AM	#54
Studio Au diyAudio Member Join Date: Sep 2008 Location: Bristol	So steel, and so magnetic? Its not gonna be spinning round at 80mph in all weathers. Just at 45rpm

6th April 2010, 03:45 PM	#56
Studio Au diyAudio Member Join Date: Sep 2008 Location: Bristol	Does that entirely rule them out? Can you demagnetize? Would it still affect the stylus in there was an inch acrylic platter on top?

13th April 2010, 05:25 PM	#57
DaveM diyAudio Member Join Date: Feb 2003 Location: Vermont	I don't see what it would. That is actually a pretty interesting idea. You would need to damp the heck out of it to tame the natural ringing of steel. But talk about a cheap way to make a high mass platter.

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