EDGE-ZERO TREMOLO / ZR2 TREMOLO
The Ibanez Edge Zero or ZR2 Tremolo is a double locking tremolo that features the zero
point system that keeps the tremolo unit flat (at the zero point). This system eliminates
the hassle of tuning, which is a shortcoming of the floating tremolo, providing a more
comfortable playing experience. The Edge-Zero uses knife edge and ZR2 uses ball-
bearings for pivots.
Attaching the tremolo arm
The tremolo arm can be inserted and removed easily. Be sure to insert the tremolo arm
into the arm socket (Fig. 1 A) and push it down firmly until the arm snaps into place (Fig. 2).
The torque of the tremolo arm is adjusted with the torque adjustment cap (Fig. 3). Turning
the cap clockwise will tighten the arm torque, and turning the screw counterclockwise will
loosen the arm torque.
Caution
Be sure to fully loosen the torque adjustment cap before attaching the tremolo
arm.
Adjusting tremolo angle and Zero Point System
The angle of the tremolo is adjusted by the balance between the tension of the strings
and the zero point system installed on the back side of the guitar body. The Edge-Zero
and ZR2 tremolo are designed so that the tremolo unit sits roughly parallel to the surface
of the guitar body by adjusting the zero point system correctly. This ensures optimal
performance. Tuning is completed when the zero point system is adjusted to the correct
position. If the tremolo is roughly parallel to the surface of the body, the stop rod contacts
the tremolo block and the stopper.
To adjust the angle of the tremolo, turn the spring adjustment knob (Fig. 4 B) on the back
side of the guitar. If the stop rod (Fig. 5 C) does not contact the stopper (Fig. 5 D) (or the
tremolo is tilted forward) while the guitar is tuned correctly, turn the spring adjustment
knob clockwise to tighten the spring. If the tremolo block (Fig. 5 E) does not contact the
stop rod (or the tremolo is tilted backward), turn the spring adjustment knob counter-
clockwise to loosen the spring.
OK
NG
Fig. 2
Fig. 3
B
Fig. 4
A
Fig. 1
E
C
D
Fig. 5
