balancing the gyro

[audiodazed]

Have any one had to add extra ballast to the subplatter on the Gyrodec because the arm is a little too heavy?
I have an audiomods with micrometer on my gyrodec. However due to the extra weight the left front spring is compressed a lot more than the other two springs.
Thus, it is very difficult to get the "bounce" right.
Has anyone ever added mass in addition to the lead weights that comes with dec to balance the springs out so the weight is more evenly distributed?

[Werner]

Why don't you weigh arm and arm board, and remove material
from the latter until you reach exactly 1 kg?

That's how it is intended to be, and it keeps you from adding
stuff where no stuff should be added.

[zharca]

Does your arm have the large or small micrometer?
If you have the old style (up to series 3) then there is an update kit for the latest micrometer version which saves almost 50g and also fits under the lid if you have one.

Jeff

[audiodazed]

Hi Jeff, its the series 4 with the smaller micrometer. But I'm using the larger end weight and the heaviest copper shim.

Werner, although I did use blue tac to "damp" the subplatter (only on the edges)
I don't think I can possibly take off enough weight from the blu tac to balance it correctly. I had to add about 250-300gms to balance it out! and I don't really want to start cutting the stock lead weights.

[Werner]

You said the arm is too heavy.

The cure is to remove material from the arm board, i.e. milling or drilling
away metal.

If you are using a standard Rega board then there is plenty of material to
remove.

But you could also weigh the lot and ask Michell for a custom board
tailored to that specific mass.

[audiodazed]

Hmm milling the armboard.... I guess that sort of presents a problem when I don't have a mill.
I didn't know Michell does custom arm boards. I will have to investigate that.
Or perhaps Jeff may be able to make one ?

[dean man jim]

Michell does great work with the custom armboards, which one can order via a dealer or distributor. The work includes very precise drilling for the arm mount. When I had one made for my Micro Seiki arm, the best price I found was the dealer Analogue Seduction in the UK.

Regards,
Jim

[Werner]

No need for a mill.

You can probably do it with a drill.

Just get arm + board together at exactly 1 kg.

[Audio_Man]

I think easier to get board from Mitchell. There are quite a few Audiomods arms on Mitchell decks now so Mitchell probably have the right measurements or can provide one off the shelf. Give them a ring.