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Products  |  Engineering Mechanics and Machine Elements  |  Fundamentals of Engineering Design  |  GL 112
GL 112 Cam Analysis Apparatus Show data sheet (pdf file) Print page
Technical Description

  The GL 112 allows the dynamic investigation of cam mechanisms, as used in motors for actuation of the valves. The cam mechanism consists of 4 interchangeable cam plates and 2 different tracers. A mass and a spring are used to simulate the valve. In order to demonstrate the so-called "valve wobble", the spring rate, mass and speed are adjustable within broad limits. A plotter allows the actual lift curves to be recorded. The open design allows the observation of every detail of the movement process. A stroboscope (not supplied) can be used to provide a particularly impressive view of the movement process and lift.

  The experimental unit is intended for demonstration purposes in technical education. It is not suitable for use as a test stand for fatigue testing.

Learning Objectives / Experiments
- comparison of different cam forms
- lift curves for non-matching tracer
- lift curve for skipping tracer
- determination of limit speed and comparison with
- influence of moving mass 
- influence of restoring spring rigidity

* 4 different cams, 2 different tracers1
* Influence of spring rigidity and moving mass1
* Plotting of lift curves1
* Excellent observation of movement process

Alternative products
GL 110 -- Cam Mechanism

[1] experimental unit for investigation of cam mechanisms
[2] 4 cams: tangent, hollow cam, 2 circular cams with different head radius
[3] tappet with 2 different tracers: flat or roller tappet
[4] 3 interchangeable restoring springs
[5] electric motor with variable speed
[6] moving mass with can be lifted with 5 additional weights; attached to tappet
[7] mechanical drum plotter with plotting spring and coated paper 


Technical Data

Three-phase asynchronous motor with frequency converter

- power: 250W

- speed: 60670min-1

- 15mm lift

- opening angle: 140
Spring rigidity
- hard: 5.026N/m
- medium: 2.601N/m

- soft: 613N/m

- additional weight: 200g

- tappet: 530g

- flat tappet: 93g

- roller: 20g
Plotter: synchronous belt drive
Optical speed sensor


Dimensions and Weight

LxWxH: 800x435x440mm (experimental unit)

LxWxH: 360x315x160mm (display and control unit)
Weight: approx. 68kg

Required for Operation
230V, 50/60Hz, 1 phase or 120V, 60Hz/CSA, 1 phase
Scope of Delivery

1 experimental unit

1 display and control unit

4 cams

2 tracer

3 restoring springs

3 blocks of plotter paper

1 combination wrench

1 hexagon screwdriver, short

1 manual

Order Details
030.11200  GL 112  Cam Analysis Apparatus
© 2005 G.U.N.T. Gerätebau GmbH