Dirt on a cut lacquer?

[andybee]

Hi!
I have sent a cut, and the plant replies:



anybody knowwhat that is?

thanks for help!

[gengy]

maybe water or spit?

[Infrasonic Sound]

Did you use the backside of the lacquer? Maybe a scuff mark.

[andybee]

thanks for your quick reply, I have told them, to send the laquer
back, the "good" side was used for the cut.
yes, I also think, that it is dirt...

[drdub]

is that ours?

[andybee]

no mex

[mossboss]

A b
Very fine lacquer particles which where lodged in the suction tube that decided to deposit themselves on the face of the lacquer
If you had a slight blockage the vacuum pump and it did like a "backfire" it spat them out
They come out in high velocity and they "glue" them shelves on the fine surface as they are tiny weeny bits that just stick to the side of the tube
We wash the pick up tube with acetone quite often so as to stop this trouble
is not common but a re-cut and a wasted lacquer is best avoided
Cheers

[gold]

A b
We wash the pick up tube with acetone quite often so as to stop this trouble

I like scraping the tube with a straightened paper clip. Acetone makes the chip gummy. If you don't get all of it out of the tube it makes chip pick up harder because the new chip sticks to the gummy film.

I could see soaking the tube in acetone but I don't have time for that or want to replace and align another chip tube while trying to get sides out.

[opcode66]

A pipe cleaner, some acetone and a steady hand works a treat for me. I make sure not to push it all the way through. I insert from the back and slowly work it forward until I see the tip at the other end. Then I remove it. Nice and clean everytime.

[mossboss]

No time to take the pick up tube out?
Argh well whatever works I suppose
We take the pick up tube out every stylus change regardless
It is soaked in acetone let to dry out cleaned up with a cotton ear bud that's the way we do as the head is out and it is not a major task
The pain is to get it back into position so as to do the trick again to pick up the chip
I have done it in 5 minutes more than once or 3-4 hours with very sore knees at the end of that session
It seems to have a life of its own which does not obey any rules
Any way
Sharp steel from paper clip will scar the inside which may accentuates the problem in my view but if it works for others well I would not say it is the best way or that it is another method Neumann suggest no sharp steel parts as it is made of brass and chrome plated
Another area of potential problem is where the tube has worn down right on the bend
That is the point the chip strikes when it first start getting sucked in
It wears away and it creates a little hollow point where this crap accumulates
That means a new tube is required
After many years of cutting it is there for sure
Cheers

[gold]

I like the pipe cleaner. I'll give that a go. Scraping the inside is admittedly not ideal. Luckily I don't get much dropped chip.

[opcode66]

If you curve one end a little it will be easier to make it around the bend.

Go light with the acetone as you dont want any to get into the cutterhead. I dip in and then let it air dry for a bit. Then push it into the tube.

I've found this to be the easiest way and I don't have to remove anything.