Abstract: This paper describes a series of programmable logic controller based on DELTA EH and DELTA servo control system was successfully applied to form a weaving machine factory in Shandong towel loom day by electric control system, the electronic control system is mainly constructed by DELTA automation products, through the user s last six months probation, a good effect, and has received recognition and determine the formal procurement.
I. Introduction
Towel rapier loom is a kind, it is the main difference between ordinary rapier loom towel rapier one more than the ordinary beam, that is, day after! Figure 1:
Figure 1 towel loom weaving factory corner
Therefore, due to a dual control by the system than the ordinary loom complex electronic control system. However, days after towel loom relatively certain dependence and specificity, its independence for the other control parts, there is tension between them only, weft density, speed, start and stop synchronization; its special lies in the course of the entire operation there are three tension section, three weft density, and ground by the (ordinary loom warp beam) there is a clear difference! In this regard, in the past have different control options:
1, calculated by the diameter of the current day and the initial diameter and initial velocity was calculated by the rate of days: This program requires absolute encoder sampling, the corresponding post-speed controller (MCU) to support and complete the algorithm. This program is characterized by good performance, but the price is high, foreign general use.
2, subsection control the current tension: the timely collection and set the tension of the current tension signal compared to the difference between the situation under the additional reduction to determine how much! Some domestic manufacturers to adopt this program. The program primarily uses single chip LCD tension sensor hardware, low cost, but the system operation ineffective, because its algorithm is relatively rough, the result by the tension of the actual system operating days uneven, with shaking.
According to prior full course of research and experience in commissioning, our control system is characterized by:
A, the system hardware automation products that are used DELTA: EH-type programmable controller, ASD-A Servo Controller, TP04G text display, so the system easy to maintain, upgrade easily.
B, the system software algorithms and in the past not the same, it is characterized by:
1) to set the value of baseline tension to tension measurement value is a reference to change the tension by speed.
2) the current speed of the initial velocity pulse incremental speed and speed PID increment.
3) The pulse velocity increment PID velocity increment weights and weight is not fixed by a different value by the straight segment is not the same.
Second, the main process
Figure 2 physical fabric towels
Figure 2 fabric - a type of towel
Can be seen through the fabric of its main process:
1, 3 tension: fluff tension, satin tension, plain tension 2, 3 process: suede, satin, plain 3, three weft density: fluff weft density, weft density satin, plain weft density
Third, the system architecture
1, hardware architecture (TP04 EHPLC ASD)
A, system architecture diagram:
Figure 3 Block diagram of hardware structure
B, PLC control wiring diagram:
Fig 4 PLC wiring diagram
C, servo control wiring diagram
Figure 5 Servo wiring diagram
4, software architecture (TP04 EHPLC):
Table 1 software chart
4, debugging
The first step: check the circuit wiring and power
Step Two: Input / Output Signal Test
Step Three: Three tension manual testing, to determine the minimum and maximum tension
The fourth step is to set parameters
The fifth step, servo parameter setting
The sixth step, manual action debugging
Seventh step, express testing, weft density adjustment (fluff multiple adjusted)