Draft and Draft Constant of the Comber Machine | Gearing Diagram of Comber Machine

i) To observe nipper movement.
ii) To know about drafting system.
iii) To know about speed of brush, cylinder, and lap feed roller, detaching roller.
iv) To find draft and draft constant.

Specification of the machine:
Main motor RPM = 1395
Diameter of main motor pulley= 167mm
Brush motor RPM = 2860
Diameter of brush motor pulley = 243mm
Diameter of cylinder = 125mm
Diameter of brush roller = 110mm
Diameter of feed roller = 70mm
Diameter of back roller = 30mm
Diameter of middle roller =30mm
Diameter of front roller = 40mm
DCP = 78T
Calculation:

figure

Results:
i) Brush speed =961.38 rpm.
ii) Nips/min= 215.72 rpm.
iii) Feed/nip= 4.48 mm.
iv) Break draft = 1.27
v) Total draft = 10.89
vi) Draft constant = 849.42
vii) Production/machine/ shift in lbs= 394.48 lbs.

Conclusions:
Comber M/C is very important & necessary M/C of producing combed sliver. This experiment is very helpful for us to learn about this M/C. So, we should learn about this experiment very carefully. Especial thanks to our teacher and his assistant for helping us.

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