Comeup Baby Winch (Ver:03) Manuel d'utilisateur télécharger pdf (Page 10)

Calculating Fleet Angle

● The winch should be mounted as close to centre

and as perpendicular as possible to the direction

of the line pull. This will keep the wire rope fleet

angle centred on the drum as small as possible.

● If the proper fleet angle is not maintained, the

wire rope could wind onto one side of the drum.

This could cause failure of the winch or wire rope, resulting in damage, injury or death.

● Experience has shown that the best wire rope service is obtained if the maximum fleet angle is

not more than 1.5°for smooth drums.

For example, the correct distance varies according to drum length.

D/d Ratio

It means ratio of pitch circle diameter of drum to the rope diameter.

In principle, a 15:1 D/d ratio is suitable for lifting and lowering applications. For example, a

CWS-230 comes with a 90 mm dia. drum and a 5 mm x 25 m wire rope, therefore its D/d ratio

is calculated as follow.

D/d ratio = ( 90 + 5 mm ) / 5 mm = 19 times

Rope Safety Factor

The working coefficient of the wire rope shall be determined from the ratio of the minimum

breaking force of the rope and the maximum possible lifting capacity.

In principle, a 5 times of rope safety factor is suitable for lifting and lowering applications.

For example, a CWS-230 comes with a 5 mm x 25 m wire rope with 1,270 kg minimum

breaking force, therefore its rope safety factor is calculated as follow.

Rope safety factor = 1,270 kg / 230 kg = 5.53 times

Correct Distance

Drum Length

Fleet Angle

IV. Compliance with EU Directives

Comeup Electric Winches comply with the following regulations

1. European Standards of EN 14492-1 for Power Driven Winches came to effect from 29

December 2009

2. European Machinery Directive 2006/42/EC.

3. European Directive on Electromagnetic Compatibility ( EMC ) 2004/108/EC

4. European Low Voltage Directive ( LVD ) 2006/95/EC

Winch Model

CWS-80 CWS-160 CWS-230 CWS-300

Drum length

4.6 cm 6 cm

Correct Distance

87.4 cm at least 114 cm at least

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 19 20

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Comeup Baby Winch (Ver:03) Manuel d'utilisateur Page 10