Geared Fivebar mechanisms are built with:
•  One GearPair 
+
•  One Dyad  two Parts, three Joints. 
Gruebler Equation: F = 3*(N–1) – 2*L H F = 3 * (5–1) – 2*5 – 1 F = 12 – 10 – 1 F= 1 DegreesofFreedom = 1 
Parts N = 5. Lower Pairs (Joints) L = 5 Higher Pairs (Cams or Gears) H = 1 There is one GearPair 
A Geared FiveBar mechanism has one MotionDimension that defines its Position. The Mobility  or Kutzbach Criterion  shows that a MotionPart has a Mobility of Zero. Mobility = Motion Dimensions – DegreesofFreedom Mobility = 1 – 1 = 0 
Geared Fivebar mechanisms are often used:
•  To give complex Coupler Curves 
•  As complex Function Generators 
The Coupler Curves and the Functions can be more complex than available from Fourbar mechanisms.
When you assemble a Geared Fivebar Mechanism, you can edit the:
1.  GearPair:  Fixed Gear Centre or Orbiting Gear Centre 
2.  Dyad:  RRR, RRP, RPR, RPP, or PRP 
3.  Gear Mesh  External Mesh or Internal Mesh 
4.  Ratio of GearTeeth 
5.  Lengths of the Part 
In a Geared Fivebar, three Parts are the
The other two Parts are joined as a Dyad. Frequently, the Dyad is an RRR Dyad.
Step 1 is complete. 

To remind you:
Step 2.a is complete.


Step 2.b is complete.
Geared FiveBar Mechanisms can give unusual motions and complex coupler curves. 

You may want to be more flexible with the design
As an alternative to the R (PinJoint) at the end of the Part used for Gear 2, add a Point (with a Line) in the Part. Use the new Point for one of the PinJoints in the RRR Dyad. You can edit the phase of the Gear 2 relative to Gear 1. The design parameter options are:


You can change the gear ratio to give more complex coupler curves.
In this case, it takes two rotations of the input crank to complete the function at the output shaft To plot the complete TracePoint ,you must rotate the input crank two times faster.


Here is an interesting Coupler Curve.
In these Coupler Curves we are plotting the Point of the PinJoint. You can add a Point to one of the Parts to give even more complex Coupler Curves. 
Typically, you can get interesting output motions from a Geared Fivebar that has a GearPair with an Orbiting Centre. The output motion is a function of the input constant speed motion and is therefore called a FunctionGenerator.
Step 2 is complete. 

Step 3 is complete. 

Step 6 is complete. Add a DesignSet to give a quick way to edit the Part lengths.


This Graph shows the Output Shaft Rotation as a Function of the Input, Constant Speed, Shaft Rotation. Notes about Mechanism Synthesis Typically, the output motion is given as a function of the input. Then a mechanism is found that has an output Part that moves with the necessary function when the input Part moves. Fourbar mechanism FunctionGenerators are limited. For example, it is not easy to synthesise a mechanism that oscillates the output shaft more than one time in a machine cycle. It is clear from this graph that more complex functions are possible with Geared Fivebar mechanisms. 

Change the Gear Ratio to give more interesting Function Generation You can change the gear ratio of the GearPair to give more complex function generation.
In this case, it takes two rotations of the input crank to complete the function at the output shaft


The Graph will show the Yaxis for two rotations of the crank to give the complete FunctionGeneration for the 60:40 gearing ratio. 
GearPair, 1:1, FixedCentres, RPR Dyad. Application: Coupler Curve


GearPair, 2:1 FixedCentres with an RPR Dyad Application: Coupler Curve


GearPair, FixedCentres, RRP Dyad. Application: Coupler Curve 

GearPair, OrbitingCentre, RPR Dyad Application: FunctionGeneration 

The 'Function' at the output Rocker. It has a reasonable dwell. 