155 (#211) ############################################ WOOLLEN FRAME SPINNING Time for spinning 1 set = 106 mins. (T) Time for doffing and changing condenser bobbins 8 mins. (D T) Time for spinning and doffing I set = 114 mins. LE and the production per hour will be :- As 114: 60 : : •125 lb. : x lb. :.066 lb. per hour per spindle for 20 skeins. or •066 X 300 19.8 lb. per 300 spindles per hour, or 19.8 X 48 950 lb. of 20 skeins per 48 hours. The calculation for obtaining the output per hour per spindle for any skeins may now be readily thought out and reduced to the following rule :- Let S Skeins to be spun; Let P = Production (theoretical) of frame or mule for S skeins in lbs. per hour per spindle ; . Let DT Doffing-time in minutes for 1 set ; Let T Time in minutes for spinning I set of skeins given. Then Px T DT + 1 = Actual lbs. production of S skeins per spindle Ꭰ + Ꭲ per hr. = 20 Example 1 : Let S 3 x 2 x 60 Then P = 20 X 256 0703 lb. per spindle per hour of 20 skeins (theoretical production). Let DT = 8. Then I =- •125 x 20 x 256 = 106 minutes for spinning 3 X 2 I set of 20 skeins. Then *0703 X 106 (8 + 106) = .066 lb. per spindle per hour of eo skeins (actual production). 155
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