Engineering Science
Worksheets
SIMPLE MECHANISMS KIT
ES14
1. CRANK AND SLIDER
Name
Date
Course/Year/Group
© TecQuipment Ltd 2012
Do not reproduce or transmit this document in any form or by
any means, electronic or mechanical, including photocopy,
recording or any information storage and retrieval system
without the express permission of TecQuipment Limited.
TecQuipment allows you to print and photocopy this
document only for use with the Engineering Science Kits.
DB/1012
Workbook Page 1 of 6
Blank Page for Notes
ES14 Worksheet
Blank Page for Notes
Workbook Page 2 of 6
ES14 Worksheet
Crank and Slider
Crank and Slider
Aims
To investigate how the Crank and Slider mechanism converts motion.
Experiment Setup
As shown in Figure 1, fix the mechanism to the Work Panel:
Figure 1 Experiment Setup
6
Workbook Page 3 of 6
Crank and Slider
ES14 Worksheet
Experiment Procedure
1. Read the Guidance Notes (supplied).
2. Set the rotary position control to 0 degrees, so its arrow points to the 0.
3. Record the linear position (the number that its arrow points to).
4. Plot your results on the chart paper.
Rotary
Position
(angle in
degrees)
Linear
Position
(in mm)
Rotary
Position
(angle in
degrees)
0
190
10
200
20
210
30
220
40
230
50
240
60
250
70
260
80
270
90
280
100
290
110
300
120
310
130
320
140
330
150
340
160
350
170
360 (0)
180
Table 1 Blank Results Table
Workbook Page 4 of 6
Linear
Position
(in mm)
ES14 Worksheet
Crank and Slider
40
Linear Position (mm)
30
20
10
0
0
20
40
60 80 100 120 140 160 180 200 220 240 260 280 300 320 340 360(0)
Rotary Position (degrees)
Figure 2 Blank Chart Paper
Questions and Conclusions
Describe the shape of the conversion curve. Is it symmetrical as described in the Guidance Notes?
In some applications of this mechanism, engineers give a name to the condition when its slider is at the
top or bottom of its travel. Do you know these names?
Try and find more examples where a crank and slider may be used.
If you have completed the ‘Scotch Yoke’ experiment, then compare the two mechanisms and think about
the advantages and disadvantages of each type. Hint - think about the number of parts, smoothness of
motion and possible sources and types of friction.
6
Workbook Page 5 of 6
Notes
ES14 Worksheet
Notes
Workbook Page 6 of 6