Internal Geneva Mechanism


1)Create 3D models for driver and driven wheels of Geneva Mechanism.

2)Creating Assembly of Geneva Mechanism.

3)Simulation of geneva mechanism at 10rpm and 20 rpm

4)Plot a graph of Contact force (between driving and the driven wheel) as a function of time.

5)Plot a graph of angular Displacement of the driven wheel.


The Geneva drive or Maltese cross is a gear mechanism that translates a continuous rotation movement into intermittent rotary motion.The rotating drive wheel is usually equipped with a pin that reaches into a slot located in the other wheel (driven wheel) that advances it by one step at a time. The main wheel also has an elevated circular blocking disc that "locks" the rotating driven wheel in position between steps.

Applications of the Geneva drive include the pen change mechanism in plotters, automated sampling devices, banknote counting machines, and many forms of indexable equipment used in manufacturing (such as the tool changers in CNC machines; the turrets of turret lathes, screw machines, and turret drills; some kinds of indexing heads and rotary tables; and so on). The Iron Ring Clock uses a Geneva mechanism to provide intermittent motion to one of its rings.

Cad Modeling and assembly

A cad model of internal geneva mechansim is created consisting of driven and driver wheel. The following components are assembled using assembly mates.Then Motion analysis is caried out at 10 rpm and 20 rpm.

Figure 1 Sketch of Internal Geneva Mechanism

Results and Dicussion 

Figure 2 Contact Force without precision 

Figure 3 Contact Force with precision 

Figure 4 Angular velocity of driver wheel


20 Rpm 

Figure 5 Contact Force without precision 

Figure 6 Contact Force without precision 

Figure 7 Angular velocity of driver wheel



1)From figure 2,3,5,6 it is clear that average contact force increases with increase in rpm.

2)Precise contact gives analytically correct results by using the equations that represent the solid bodies. 

3) Velocity of driven increases and then decreases and then stops and this pattern repeats.

4)From Figure 7 it is evident that first angular acceleration takes place then angular retardation of driven wheel.

5) From angular velocity digram and animation, a jerk at contact comes on driven wheel

6) Maximum angular velocity of driven wheel is less than that of driver wheel due to large diameter of driven wheel.





Projects by Akshay Saxena

Objective Conduct a frequency analysis on a stepped shaft  as shown in model and obtaining list of resonant frequencies and 5 mode shapes. CAD modelling Create a stepped shaft of dimensions as shown in figure1 using tools like cirle and extruded boss/base. S Read more

Objective a) Perform a buckling analysis on a cyclonic separator stand without stiffener b) Perform a buckling analysis on a cyclonic separator stand with stiffener c) Run a design study and find the optimum position and thickness for the stiffener.   Cad Read more

Objective  Perform a static analysis on two models of plate with holes. You will have to create the model in Solidworks and perform the analysis. Simulation Parameters  1) Material alloy steel with youngs modulus of 210GPA 2) Fixed geomery : Face where Read more

Objective 1) To Plot  Valve Lift.  The contact force between  Cam and Push Rod Pushrod and Rocker Arm Rocker Arm and Valve 2) Explain why the contact force between the Rocker arm and valve varies while measuring with respect to the X dire Read more

Objective Obtain the Linear displacement of the Piston Head  a) 0 mm offset  b) 10 mm positive offset c) 10 mm negative offset Modeling Each part is  individually modeled and assembled. First cylinder is modelled as mention in challenge. Then connec Read more

Objective  1) To carry out  analysis on made up centrifugal pump 2) To understand relationship between pressure ratio and mass flow rate Theory Centrifugal pump is device to create pressure difference across inlet and oulet. Surging is a one of criteria us Read more

Medi box
Akshay Saxena · 2018-08-14 15:22:44

The objective of the medi box to organise your mediciene according to days. The Design  Different Models of Blades The Rendered Image Final Product    Read more

Mars rover Manipal
Akshay Saxena · 2018-08-14 15:09:57

Objective To design a robotic assistant for terrain traversal in mars like terrian  Challenge  The main objective of this project was to participate in URC 2016 challenge. A team of 9 members designed a assistive robot based on guidelines provideby universi Read more

Objective   a) Carrying out Grid dependence test for three different grids  at a particular valve lift. b) To analyse effect of valve lift on mass flow rate . Setup  A dummy cad model is created having hypothetical  dimensions Shown in Read more


The End