摘要:
In some embodiments, a method includes providing a first controller; providing a second controller; using the second controller to control a plurality of valves to provide a sequence of air jets that propel a weft thread across at least a portion of a weft insertion region of an air jet loom; and using the first controller to control at least one aspect of the air jet loom not controlled by the second controller. In some embodiments, a method for a controller in an air jet loom includes (a) defining a reference loom configuration; (b) determining a characterization of the reference loom configuration; (c) determining a modified loom configuration by at least one change to the reference loom configuration; (d) determining a characterization of the modified loom configuration; and (e) revising the reference loom configuration if the characterization of the modified loom configuration satisfies a criteria.
摘要:
A weaving loom and a control method therefor are disclosed, said loom comprising at least one weaving machine, a sley, weft inserting members and a main driving motor which is operated at a variable speed on the basis of predetermined textile requirements.
摘要:
To provide a weft control system capable of adjusting weft feed rate correctly and easily, there is disclosed a weft control system for looms consisting of a weft length measuring system (1) comprising a length measuring roller (1a) and a pinch roller (1b), a weft feeding system comprising a gripper (4) and a nozzle (3), and weft arrival sensors (6 and 7) installed in the weft arriving position in the loom. The weft control system has a process to store the weft arrival measurement value measured by weft arrival sensors, a process to calculate the average weft arrival value for a certain number of picks, a process to compare the derived average arrival value with a preset reference target value, and a process to control the weft length measuring system based on the result of comparison performed in the preceding process.
摘要:
A control method for the rotational frequency of a weaving machine (10) comprises the steps of performing a plurality of times of trial runnings of the weaving machine at different trial rotational frequencies to obtain the operating time for each rotational frequency, obtaining the indefinite coefficients in the formula representing the relation between a rotational frequency factor and an operating time factor by utilizing each obtained operating time and each trial rotational frequency, obtaining the optimum rotational frequency, at which the quantity of production reaches the maximum, by utilizing the obtained indefinite coefficients, and controlling the rotational frequency of the weaving machine into the obtained optimum rotational frequency.
摘要:
The present invention relates to a method of controlling operating speed (N i ) of the loom for increasing the production rate (P) by varying the operating speed (N i ) to be increased. The method comprises a step of estimating a stop rate (n̂) at the final point of time during a predetermined period at a certain time during the predetermined period, comparing the estimated stop rate with a predetermined limit stop rate (Q S ), and setting the operating speed (N i ) to increase when the estimated stop rate (n̂) is less than the limit stop rate (Q S ) and to decrease when the estimated stop rate (n̂) exceeds the limit stop rate (Q S ).
摘要:
The invention aims at equalizing weft time differences when launching successive threads and thereby obtaining a more uniform doth. For that purpose the thread velocity in the initial phase of the weft is measured and on the basis thereof an additional pressure impulse of the conveying fluid may be supplied to the thread. According to a different possibility, in dependence on the measured value, the thread is more or less braked by means of a brake at the end of the weft phase.
摘要:
The invention relates to a weaving machine and a shedding machine each with at least one independent speed-adjustable electric motor drive, whereby time points or rotational angles for a speed change are fixed on the basis of certain criteria. According to the invention, computer means are provided preferably integrated in the electronic controller for the weaving and shedding machine which determine and set the control such as to give a synchronous or asynchronous speed change.
摘要:
The invention relates to a drive for a machine, more particularly a weaving loom, wherein the drive motor (2) is supplied electrical energy in a controlled manner depending on the corresponding angular position and the supply of electrical energy to the drive motor is interrupted in phases at increasing rotational speed.
摘要:
The invention relates to a method for adjusting the weaving parameters used for weaving machines. When adjusting the weaving speed, values for the weaving parameters are determined and adjusted that are adapted to the modified weaving speed using one or more modification functions based on the values optimized for a certain weaving speed.