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GL 112

Cam Analysis Apparatus

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 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
theory
- Influence of moving mass
- Influence of restoring spring rigidity

Features

* 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

Specification

[1] Benchtop 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 speed control
[6] Moving mass with can be lifted with 5 additional weights; attached to tappet
[7] Mechanical drum plotter with plotting spring and coated paper
[8] 230V, 50/60Hz, 1 phase or 120V, 50/60Hz, 1 ph.

Technical Data

Three-phase asynchronous motor with frequency converter:

- power: 250W

- speed: 60…670rpm
Cams:

- 15mm lift

- opening angle: 140°
Spring rigidity:
- hard: 5026N/m
- medium: 2601N/m

- soft: 613N/m
Masses:

- additional weight: 200g

- tappet: 530g

- flat tappet: 93g

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

Dimensions and Weight

l x w x h : 800 x 435 x 440 mm
Weight : approx. 50 kg

Connections

230V, 50/60Hz, 1 phase or 120V, 50/60Hz, 1 phase

Scope of Delivery

1 unit, 4 cams, 2 tracer, 3 restoring springs, 3 blocks of plotter paper, 1 combination wrench, 1 hexagon screwdriver, short, 1 instruction manual

Order Details

030.11200 GL 112 Cam Analysis Apparatus