background noise problem by vacuum with vinyl recorder t560

[marcy108]

hi all.
now i have background noise problem. with vinylrecorder t560.
i suspect vibration make background noise.

i do vacuum switch on.cutterhead is vibrated.i confirm by my hand.
vibration is weak.but it exist obvious.
do you think this is normal setting?

i guess this vibration make 3 problem.
1.it makes bass(low) noise.
2.it makes high noise.
3.it can do damage to stylus.

i did test that cut with no vacuum.
i could remove 1 and 2.

but i can't find the way that no background noise cutting with vacuum on.
any advice would be appreciated!

thanks.

[marcy108]

is this vacuum power too strong?
blue cap and hose is moved when vacuum switch on.

https://www.youtube.com/watch?v=UIv78JWylF0

[SUNBEARS]

First thing I did with mine was remove the tank from mounting place on the base of the vinylrecorder. I have it mounted to a stand that sits behind the lathe now, that way no vibrations are transfered to the cutter. I suggest you do the same!

Cheers,
J

[grooveguy]

Sunbears is right. Get the chip collection tank away from the recorder and make sure the vacuum pump is not sitting on the same table, or even the floor next to the recorder. I used to keep my vacuum pump in a closet in the next room. That should get rid of all low frequency noise. I used to get some 'sucking' sound in my recordings (like white noise) from the air moving across the cutting area, and learned to start off a recording with the highest vacuum I could create, and then cut it back to just what was necessarily for reliable removal of the chip. That ended the high frequency noise.

Good luck and remember, disc recording is 10% science and 90% black magic!

[marcy108]

hi,SUNBEARS.
thank you for your post.
i did divide VR table and chip tank table.
there is still remain small vibration.
but i could get rid of almost low noise when i do cutting.

hi grooveguy.
thank you for your post.
>I used to keep my vacuum pump in a closet in the next room.
because vacuum hose is short.approx 1.5m.
how can i extend the hose?
and how long meter do you extend the hose?
thanks.

[grooveguy]

Hi, Marcy108,

The chip jar needs to be close to the recorder. You can usually put the jar on the same table just behind the lathe so that the rubber surgical tubing between the cutterhead and the jar is short, maybe 2 feet (0.6m) maximum. I use tubing that's about 3/8 inch (10mm) outside diameter and 1/4 inch (6mm) inside. From the chip jar to the vacuum pump can be any length, but it should have a large diameter so that the friction of the air against the walls of the hose do not slow the velocity of the air. When mine was in the next room I used 1.5 inch (38mm) PVC (plastic) water pipe, which is quite inexpensive, for most of the run. The last few feet was plastic hose as you would use in a garden.

I've attached some shots of my own lathe. In the first picture, you can see the chip-collection tube behind the stylus.

DSCN4586.JPG

The second shot shows the top of the lathe with the blue surgical tubing from the head to the deck plate.

DSCN4585.JPG

The next shot is under the deckplate and shows the chip jar with its garden hose to the vacuum motor.

DSCN4587.JPG

The last shot is the vacuum motor in the woodgrain box at the bottom of the cabinet. The motor is suspended on springs in the box and well insulated so there is no noise or vibration.

DSCN4588.JPG

[marcy108]

>grooveguy
thank you for your post.
good advise and good pic.
i'm grateful of you.

[sat159p1]

I used to get some 'sucking' sound in my recordings (like white noise) from the air moving across the cutting area, and learned to start off a recording with the highest vacuum I could create, and then cut it back to just what was necessarily for reliable removal of the chip. That ended the high frequency noise.!

Dont get it- you turn your vacuum
on max when starting? The most noticeable hiss is on the edges if the disc so... dont get it. Can you ellaborate?