Record player arm bounces back at the end of each side
 

The arm on my record player reaches the end of a side, then seems to
leap back, often landing a couple of rotations back into the groove.

What could cause this?

Daniele

Record player arm bounces back at the end of each side
 

On Thu, 13 Dec 2012 17:06:09 +0000,
(D.M. Procida) wrote:

The arm on my record player reaches the end of a side, then seems to
leap back, often landing a couple of rotations back into the groove.

What could cause this?

Daniele

Something is forcing it back. Lift it and check for free movement all
the way across the playing area as far as the label. If this is an
autochanger, almost certainly the end-of-side mechanism is stiff and
needs stripping, cleaning and oiling.

d

Record player arm bounces back at the end of each side
 

In article , Don Pearce
wrote:
On Thu, 13 Dec 2012 17:06:09 +0000,
(D.M. Procida) wrote:

The arm on my record player reaches the end of a side, then seems to
leap back, often landing a couple of rotations back into the groove.

What could cause this?

Daniele

Something is forcing it back. Lift it and check for free movement all
the way across the playing area as far as the label. If this is an
autochanger, almost certainly the end-of-side mechanism is stiff and
needs stripping, cleaning and oiling.

An (unlikely, but possible) alternative reason is that the 'bias' is too
high. The start of the scroll-out might be just enough to lift the stylus
out of the groove. If so, may be a misalignment or simply drag or high
outward bias.

What arm+deck+cartridge is it?

Slainte,

Jim

--
Please use the address on the audiomisc page if you wish to email me.
Electronics http://www.st-and.ac.uk/~www_pa/Scot...o/electron.htm
Armstrong Audio http://www.audiomisc.co.uk/Armstrong/armstrong.html
Audio Misc http://www.audiomisc.co.uk/index.html

Record player arm bounces back at the end of each side
 

Don Pearce wrote:

On Thu, 13 Dec 2012 17:06:09 +0000,
(D.M. Procida) wrote:

The arm on my record player reaches the end of a side, then seems to
leap back, often landing a couple of rotations back into the groove.

What could cause this?

Daniele

Something is forcing it back. Lift it and check for free movement all
the way across the playing area as far as the label. If this is an
autochanger, almost certainly the end-of-side mechanism is stiff and
needs stripping, cleaning and oiling.

Its movement is free all the way, but when it reaches the end of the
run-out at the end of the side, it doesn't stay there but jumps back.

No autochanger (it's a Linn Akito).

Daniele

Record player arm bounces back at the end of each side
 

On Thu, 13 Dec 2012 18:31:39 +0000,
(D.M. Procida) wrote:

Don Pearce wrote:

On Thu, 13 Dec 2012 17:06:09 +0000,
(D.M. Procida) wrote:

The arm on my record player reaches the end of a side, then seems to
leap back, often landing a couple of rotations back into the groove.

What could cause this?

Daniele

Something is forcing it back. Lift it and check for free movement all
the way across the playing area as far as the label. If this is an
autochanger, almost certainly the end-of-side mechanism is stiff and
needs stripping, cleaning and oiling.

Its movement is free all the way, but when it reaches the end of the
run-out at the end of the side, it doesn't stay there but jumps back.

No autochanger (it's a Linn Akito).

Daniele

Well, it won't do that without some force. Something is pushing it
back. Maybe it is not as free as you think. Alternatively, look at
Jim's suggestion that the bias is set wrongly. I don't know how it is
applied on this arm, but if you adjust it off as far as possible, that
will tell you if it is responsible.

d

Record player arm bounces back at the end of each side
 

On 13/12/2012 18:48, Don Pearce wrote:
On Thu, 13 Dec 2012 18:31:39 +0000,
(D.M. Procida) wrote:

Don Pearce wrote:

On Thu, 13 Dec 2012 17:06:09 +0000,
(D.M. Procida) wrote:

The arm on my record player reaches the end of a side, then seems to
leap back, often landing a couple of rotations back into the groove.

What could cause this?

Daniele

Something is forcing it back. Lift it and check for free movement all
the way across the playing area as far as the label. If this is an
autochanger, almost certainly the end-of-side mechanism is stiff and
needs stripping, cleaning and oiling.

Its movement is free all the way, but when it reaches the end of the
run-out at the end of the side, it doesn't stay there but jumps back.

No autochanger (it's a Linn Akito).

Daniele

Well, it won't do that without some force. Something is pushing it
back. Maybe it is not as free as you think. Alternatively, look at
Jim's suggestion that the bias is set wrongly. I don't know how it is
applied on this arm, but if you adjust it off as far as possible, that
will tell you if it is responsible.

d


Sounds like a combination of wildly out tracking weight, bias adjustment
and turntable level. Can't think how/why else that could happen. Has the
TT been moved or adjusted recently?

Rob

Record player arm bounces back at the end of each side
 

On 13/12/2012 22:16, RJH wrote:

Sounds like a combination of wildly out tracking weight, bias adjustment
and turntable level. Can't think how/why else that could happen. Has the
TT been moved or adjusted recently?

Or any children in the house?

Is the bias provided by a weight on a thread, like an SME arm?
It could be wrapped round something.

--
Eiron.

Record player arm bounces back at the end of each side
 

In article , Don Pearce
wrote:
On Thu, 13 Dec 2012 18:31:39 +0000,
(D.M. Procida) wrote:

Don Pearce wrote:

On Thu, 13 Dec 2012 17:06:09 +0000,
(D.M. Procida) wrote:

The arm on my record player reaches the end of a side, then seems to
leap back, often landing a couple of rotations back into the groove.

What could cause this?

Daniele

Something is forcing it back. Lift it and check for free movement all
the way across the playing area as far as the label. If this is an
autochanger, almost certainly the end-of-side mechanism is stiff and
needs stripping, cleaning and oiling.

Its movement is free all the way, but when it reaches the end of the
run-out at the end of the side, it doesn't stay there but jumps back.

No autochanger (it's a Linn Akito).

Daniele

Well, it won't do that without some force. Something is pushing it back.
Maybe it is not as free as you think. Alternatively, look at Jim's
suggestion that the bias is set wrongly. I don't know how it is applied
on this arm, but if you adjust it off as far as possible, that will tell
you if it is responsible.

It may be that the overhang is wrong. That can cause a very high bias near
the end-of-side. Check with a setup protractor or similar. Also check the
'roll' angle. i.e. when viewed from the front of the cartridge along the
line of the groove, is the stylus perpendicular to the surface of the LP?

I obviously can't tell sitting here what the reasons may be. But the points
to bear in mind may be that:

A) The effect of incorrect alignment - e.g. overhang - tends to grow as you
move nearer to the center of rotation.

B) The end-of-side leads to a scroll inwards. At that junction the
beginning of the scroll will try to apply a high sideways force.

C) Drag (and thus skating) force tends to rise near the center. Although
this depends a lot on the nature of the LP. more below...

My only personal experience with the Linn was ye olde Ittok/Asak. Which I
found a total PITA. Massive end-of-side distortion even when aligned as
well as possible. It always puzzled me that people seemed not to notice
this. But one consequence tends to be higher *drag* which in turn increases
the generated skating force. And also tends to try and lift the stylus out
of the groove.

Slainte,

Jim

--
Please use the address on the audiomisc page if you wish to email me.
Electronics http://www.st-and.ac.uk/~www_pa/Scot...o/electron.htm
Armstrong Audio http://www.audiomisc.co.uk/Armstrong/armstrong.html
Audio Misc http://www.audiomisc.co.uk/index.html

Record player arm bounces back at the end of each side
 

RJH wrote:

Well, it won't do that without some force. Something is pushing it
back. Maybe it is not as free as you think. Alternatively, look at
Jim's suggestion that the bias is set wrongly. I don't know how it is
applied on this arm, but if you adjust it off as far as possible, that
will tell you if it is responsible.

d


Sounds like a combination of wildly out tracking weight, bias adjustment
and turntable level. Can't think how/why else that could happen. Has the
TT been moved or adjusted recently?

I had a new cartridge fitted a while ago by a local hifi shop.

On further checking, the tracking weight is too low.

In fact it can't be set higher than 1.6g (for a Goldring Elan cartridge)
because the cartridge has been mounted right at the close end of the
mount, rather than in the middle.

If they'd put it in a more sensible place there'd be a proper range of
adjustment.

I'll try it on 1.6g and see what happens, but I am not very impressed by
the way it was installed.

Daniele

Record player arm bounces back at the end of each side
 

In article , Bob Latham
wrote:
In article , Jim Lesurf
wrote:

My only personal experience with the Linn was ye olde Ittok/Asak.
Which I found a total PITA. Massive end-of-side distortion even when
aligned as well as possible. It always puzzled me that people seemed
not to notice this.

I've never noticed it at all.

It depends on the type of music played. It seemed very obvious to me on
orchestral climaxes with massed strings, etc, at an end-of-side. But may
well not be noticed on others things like rock music with electric guitars
and drums. It may also hinge a bit on how familiar the listener is with
live music inc things like massed strings, etc. And FWIW my impression
was that the mistracking could give more 'impact' to rock music, so
a result that I guess some people would like, depending on taste in
music, etc.


Was that the only reason you find it a PITA?

No. I also found other 'features' annoying. Some of them pretty daft
behaviour. e.g. a felt mat that tended to stick to the LP and had to be
peeled off after lifting the LP. Or the little lid 'bumpers' that kept
falling off. Or the wow sometimes audible due to the movements of the
turntable. Although the last was less problematic given off-center problems
with some LPs. None as serious as the distortion from the Asak cart,
but made the system a pest to use.

Slainte,

Jim

--
Please use the address on the audiomisc page if you wish to email me.
Electronics http://www.st-and.ac.uk/~www_pa/Scot...o/electron.htm
Armstrong Audio http://www.audiomisc.co.uk/Armstrong/armstrong.html
Audio Misc http://www.audiomisc.co.uk/index.html