Whammy Wheel Parts

The wmy-wheel-joint.stl and wmy-wheel-pot.stl parts will need to be super glued to the wmy-wheel-mid.stl part.

Glue Joint to Wheel

Start by applying a moderate amount of super glue to the wmy-wheel-joint.stl to one of the sides of the wmy-wheel-mid.stl part. 


Glue Potentiometer Holder to Wheel

Add super glue to the wmy-wheel-pot.stl part and adhere it to the other side of the wmy-wheel-mid.stl part.

Glue Spring Plate

The wmy-plate-spring.stl part will need to be super glued to the wmy-plate-pot.stl part. Apply a moderate amount of super glue to the flat side of the wmy-plate-spring.stl part.

Glue Spring Plate to Potentiometer Plate

Adhere the wmy-plate-spring.stl part to the flat side of the wmy-plate-pot.stl part. Double check the edges are square on both of the parts.

Spring Assembly

An extension spring will be attached to the wmy-spring-ring-a.stl and wmy-spring-ring-a.stl parts to create the spring assembly. 

Install Extension Spring 

Install the extension spring to either the wmy-spring-ring-a.stl or wmy-spring-ring-a.stl part. Press fit one of the loop ends to the slot on the end of the spring rings.

Install Ext. Spring to Holders

Grab the second spring ring and install the remaining loop end. Hold the two spring rings together so they're together.

Install Spring Holder Set to Plate

Place the set of spring rings onto the cylindrical post on the wmy-plate-spring.stl part. The two spring rings are placed and fitted together. Reference the photo for correct placement.

Installed Spring Holder Assembly

The spring assembly is now ready to be installed into the rest of the whammy assembly. 

Whammy Wires

Gather up the knobby potentiometer, 3-pin jST female cable, 10-wire silicone ribbon wire and  the 3-pin JST male connector.

Measure and cut a piece of the 10-wire ribbon wire (88mm in length). Peel off a 3-wire set.

JST Wire

Wire up the 3-wire silicone cable to the 3-pin JST male connector. Don't forgot to put heat shrink tubing on first!

JST Cables

Cut and trim the 3-pin JST female cable to prepare it for wiring. The following wire lengths are recommended.

female cable – 74mm

male cable – 88mm

Solder Potentiometer

Wire up the 3-wire silicone cable to the potentiometer. Connect the 3-pin JST female cable and follow the signal, voltage and ground wiring. Signal (white) in the middle pin. Voltage and ground on the side pins.

Test JST Connection

Double check the wires and cross reference the circuit diagram.

Center Potentiometer

Turn the knob so the white marker is centered with the middle pin.

Install Potentiometer

Press fit the knob on the potentiometer into the whammy wheel. Check the orientation of the pins are facing up.

Spring Tension

The tension in the spring needs to be tight in order for the wheel to snap back to the center. Using needle nose pliers can help assist in bending the loops so the spring tension is tighter.

Whammy Body Parts

The whammy assembly requires 4x M3 x 6mm screws and 4x M3 hex nuts. The two mounting brackets (wmy-plate-idler.stl and wmy-plate-pot.stl) will need to be secured and fastened to the bottom half of the body.

Install Whammy Idler

Insert 2x M3 x 6mm through the bottom of the guitar. Place the wmy-plate-idler.stl over the two screw threads. Insert and fasten 2x M3 hex nuts to secure the part to the body of the guitar.

Install Wheel to Body

Insert the remaining 2x M3 x 6mm screws into the mounting holes on the guitar. Place the wheel sub-assembly in the body of the guitar. Insert the cylinder from the wmy-wheel-pot.stl part into the hole in the center of the wmy-plate-idler.stl

Whammy Assembled

Test out the check the whammy bar mechanism by moving the wheel back and forth. The hex nuts should be nice and tight. 

This guide was first published on Mar 18, 2020. It was last updated on Apr 19, 2024.

This page (Whammy Assembly) was last updated on Mar 08, 2024.

Text editor powered by tinymce.