Method for optimizing the production of a rotor spinning Machine
First Claim
1. A method for optimizing production of a rotor spinning machine having a plurality of identical spinning units, with each spinning unit having a spinning rotor, and wherein during operation of the rotor spinning machine, the spinning rotors are driven by a rotor drive, rotate at a rotor speed, and provide a yarn at a delivery speed, the rotor spinning machine having one or more control units configured with the spinning units to perform the method, the method comprising:
- specifying a permissible range with a minimum delivery speed and a maximum delivery speed for the delivery speed of the spinning units;
starting operation of the spinning units with a starting delivery speed within the permissible range;
continuously monitoring and calculating current production capacity of the spinning units or the rotor spinning machine;
regulating current delivery speed as a function of the current production capacity, in such a manner that a maximum production capacity is achieved, comprising increasing the delivery speed from the starting delivery speed to reach a predetermined production capacity and only decreasing the delivery speed when the increase in delivery speed results in a decrease of the monitored and calculated production capacity; and
wherein one or more of the following are used for calculating the current production capacity;
current thread breakage rate, current clearer cut rate, current maintenance intervention rate, and maintenance capacity.
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Accused Products
Abstract
A method optimizes production of a rotor spinning machine having a plurality of identical spinning units, with each spinning unit having a spinning rotor driven by a rotor drive at a rotor speed to produce yarn at a delivery speed. A permissible range with a minimum delivery speed and a maximum delivery speed for the delivery speed of the spinning units is specified. Operation of the spinning units is started with a starting delivery speed within the permissible range. Current production capacity of the spinning units or the rotor spinning machine is continuously calculated. Current delivery speed of the yarn is regulated as a function of the current production capacity in such a manner that a maximum production capacity is achieved. A rotor spinning machine in accordance with method is also provided.
42 Citations
16 Claims
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1. A method for optimizing production of a rotor spinning machine having a plurality of identical spinning units, with each spinning unit having a spinning rotor, and wherein during operation of the rotor spinning machine, the spinning rotors are driven by a rotor drive, rotate at a rotor speed, and provide a yarn at a delivery speed, the rotor spinning machine having one or more control units configured with the spinning units to perform the method, the method comprising:
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specifying a permissible range with a minimum delivery speed and a maximum delivery speed for the delivery speed of the spinning units; starting operation of the spinning units with a starting delivery speed within the permissible range; continuously monitoring and calculating current production capacity of the spinning units or the rotor spinning machine; regulating current delivery speed as a function of the current production capacity, in such a manner that a maximum production capacity is achieved, comprising increasing the delivery speed from the starting delivery speed to reach a predetermined production capacity and only decreasing the delivery speed when the increase in delivery speed results in a decrease of the monitored and calculated production capacity; and wherein one or more of the following are used for calculating the current production capacity;
current thread breakage rate, current clearer cut rate, current maintenance intervention rate, and maintenance capacity. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A rotor spinning machine, comprising:
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a plurality of spinning units, each spinning unit comprising; a spinning rotor with a rotor drive wherein the spinning rotor is driven with a variable rotor speed during operation of the rotor spinning machine; a draw-off device by which a produced yarn is removed from the spinning unit at a delivery speed; wherein a current production capacity of the spinning units or the rotor spinning machine is continuously calculated; a control unit configured to regulate the delivery speed within a permissible range having a minimum delivery speed and a maximum delivery speed based on the current production capacity in a manner such that a maximum production capacity is achieved; wherein the control unit is configured to increase the delivery speed from a starting delivery speed to reach a predetermined production capacity and only decrease the delivery speed when the increase in delivery speed results in a decrease of the continuously calculated production capacity; and wherein one or more of the following are used by the control unit to calculate the current production capacity;
current thread breakage rate, current clearer cut rate, current maintenance intervention rate, and maintenance capacity. - View Dependent Claims (12, 13, 14, 15, 16)
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Specification