Die-cutting machine system is a kind of mechanical equipment that requires high dynamic response to the motor. The servo system is required to provide very fast dynamic response and precise positioning capability. The system we have implemented is based on the high dynamic response capability of ED servo drives and motors. It also uses the programming capabilities inherent in the ED servos and also uses high-speed pulse output previously used in the system. The ability of the PLC to replace the general PLC, saving the cost for the customer. Here are some of the features of our driver:
1. All-digital speed and position control functions, and provide position, speed and torque control functions, with high dynamic response capability;
2, flexible tracking control, providing high-sensitivity tracking effect;
3, programmable digital input and output;
4, can monitor the motor short circuit, voltage, temperature, encoder, position tracking and high current fault;
5, through RS232, RS485, Profibus, CAN communication port for parameter setting;
So our servo drive is fully capable of doing this job. The following is a brief introduction of this system:
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First, the die-cutting machine mechanical mechanism diagram
Second, the equipment process
1: The servo motor drags the running track of the plastic film. As shown below:
Process Description: There are two main cutting membranes.
1: Cursor cutting: Just like the above running track, S1 area follows, then enters the “search for color†area, waits for the color mark, and after detecting the color mark, enters the positioning mode and takes a fixed length.
2: Programmable cutting membrane: It is a set length each time. Program-controlled membrane cutting is divided into two types. 1: Cut to length, that is, the distance of each cut is the same. 2: Long cut is to set a number of lengths in advance, and then cut in accordance with the set length.
3: There are some combined use. Such as: light control + program control. It is the first time to use light control to locate and then use program control to control, but these are some of the functional applications that are not specified here.
Third, the trajectory control points
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Third, the trajectory control points
The frequency converter controls the die-cutting head. Because the frequency changer is fastest 50Hz, can control the die cutting head 300inc/min, so the servo controller, also must start/stop 300 times/min. Because the die head is absolutely not allowed to drag when cutting. Therefore, the servo operation time is when the die-cutting head comes into contact with the "rising sensor" and starts to run, and then the film is pulled before the die-cutting head touches the "top sensor". If you have not received the "drag completion signal" of the servo when the die cutting head touches the "top sensor", it is considered that the speed of dragging the film is too slow.
Fourth, servo programming
Fourth, servo programming
Light control flow: First enter the "speed mode", and compare the running distance. When the running distance exceeds S1, the fast capture port is started to capture the color code. 1 If the color code is captured, it will send the speed (60ff0020) in the speed mode. Give the servo the highest speed of positioning mode (60810020), then enter absolute positioning. The out1 output is output after the positioning is reached. 2 If no color mark is found within the maximum allowable run length, out2 is output and the servo is stopped.
Din1 trigger start, call seq10
Seq10 (Set the current position + S1 to set the position of the fast capture port, and stop Comparator 1 and Comparator 2)
21A00120
21A00320 80000 (S1 length, HMI setting)
21A00410 1
21A00220
0 (Cancel Comparator 1)
0 (Cancel Comparator 2)
F
SeqF (setting: if the color mark is not found in the "maximum length of each run", the motor stops and then an error occurs)
21A00120
21A00320 100000 (Maximum length per operation, HMI setting)
21A00410 1
21A00220
11
Seq11 (first uniform motion.)
3
60FF0020 10000
F
13
Seq13 (Start comparator 1, compare the actual position, determine whether to start triggering fast capture port)
0
FFFFFFFF
(21800420 already set in seq10)
5
Seq14 (Start comparator 2 and compare the actual position to determine if the "maximum length of each run" is exceeded and trigger the fast capture port at the same time)
0
FFFFFFFF
(21810420 already set in seq0F)
5
(overtravel seq20)
21C00110 8015 (fast capture port starts triggering, waiting for N signal)
21C00220 0
Seq15
1
21A00120 (put the speed of 3 mode into 1 mode)
21A00410 0 (copy)
21A00220
607A0020 10000 (S2 length to run after detecting N signal,)
F
0 (Cancel Overtravel Comparator 2)
16
Seq16
5F (relative positioning)
Seq20 (Overtravel alarm output)
01 (out1 output, because I have set in the output, see the program)
(delay 1S)
Seq21
00 (out1 stop output)
Program control is constantly changing the positioning length. Don't write it here, see the program.
Five, electrical diagram
Sixth, debugging
The following figure is the servo motion curve acquired when the light control is 300/min:
Seven, summary
Since the servo can be programmed internally, it avoids the need to write complex PLC programs and also reduces the burden on the PLC. It can be replaced by a very small PLC. In addition, KINCO servo can also control the inverter through the analog output interface. Reduced system costs. At present, the speed of the die-cutting machine to complete 300 / min is no problem, the accuracy fully meets the requirements of customers, after two months of test machine, the customer is very satisfied with the stability of the ED servo, there is no failure. The die cutting machine starts and stops the machine at a high speed (essentially 60/s). The die cutting head basically does not stop to let the servo run, but restarts after the servo is stopped. This will cause the entire system to lose efficiency. Similar devices such as high-speed bag-making machines, sleeve labeling machines, etc., require hundreds of devices per minute. Currently, Kinco servos have been widely used in these applications.