my buddy has a Jackson JS30DK Dinky that i just put new strings on and it has Die-Cast Tuners.. im not used to this allen wrench stuff and i cant get it to stay in tune for more than 10 seconds
Loosen the nut, put a wooden block under the FR to make sure it doesn't sink in. Makes tuning easier, keep the trem arm in there also.

Ok now, as for the actual tuning.

Tune your Low E
Tune the A
Low E again
Tune the D
Low E
Low E
Low E
High E
Low E

Lock the nut, and it should stay in tune.

If not, then post again, and we'll try and help you some more.

EDIT: You might wanna tune your string a half step up, because once you're done tuning, they tend to drop a bit, but then again, that's only on some guitars.
Last edited by The Casualty at Feb 15, 2007,
Its called the Floyd Rose system, diecast is the material/technique used to make the metal of the machinehead...

Tuning Floyd Rose

1) Loosen the locking nut
2) Set your fine tuners to middle position
3) Tune up your guitar to standard or whichever tunings u wish. "Cross-tuning" between strings if you want easier. Tune the low E string> A string> low E string again> D string> low E string>A string... and so forth. Keep repeating for all strings. To make it more easier, tune the low E generally a bit sharper or about half step sharper, so that you might not have to repeat crossing the strings again and again.
4) If the floating bridge comes out, loosen the tunings and then tighten the springs in the tremolo cavity at the back, if the bridge sinks, then vice-versa, until the bridge is parallel to the body.
5) Be patient
6) If you're happy with your tunings and your bridge is well centered, lock in the nut
7) Tune again using the fine tuners

Also some tips - You might want to have at least 3 springs and after following the tuning method above, tighten the 2 claw's screw for about 1/8th or 1/4th more. This is to prevent your floating bridge from getting stuck to the knife edges on the posts (action studs) after you bend notes. You can ignore this if your bridge/trem is reliable (e.g. Edge Pro, Edge, ZR, Lo-Pro Edge, Original Floyd Rose, Licensed Floyd Rose by Kahler/Schaller/Gotoh). But still you may face this problem even if your bridge is very good.

Stretch the strings first if they're new

More info on tuning floyd roses - http://www.floydrose.com/originaltremolo.html
Info on changing strings - http://www.ultimate-guitar.com/columns/features/steal_this_video_re-stringing_guitar.html
Picture guide on how to perform the #4 step mentioned above - http://www.fretnotguitarrepair.com/floydrosetremolo.htm

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Quote by drewbert41
there is 3 nuts

There's only one nut, those are just what keeps the string in place.