Development and application of flying shear control instructions
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- Time of issue:2022-08-04
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(Summary description)Flying shear control, the past practice is to plan the curve from tracking to return as a whole, reserve enough synchronization time when synchronizing, wait for the cutter to cut off, and keep the synchronization until the alarm if the cutter is not cut off. With Zhuhai Haikong CAM2 flying shear control command, there is no need to plan the curve, and the cutting length can be set by parameters, which has greater flexibility. At the same time, the use of the CAM2 command can simplify the mechanical device, save the special controller, save the hardware cost, and at the same time, it can achieve a good effect of chasing cutting. The structure of the chasing shearing equipment is shown in the figure:
Development and application of flying shear control instructions
(Summary description)Flying shear control, the past practice is to plan the curve from tracking to return as a whole, reserve enough synchronization time when synchronizing, wait for the cutter to cut off, and keep the synchronization until the alarm if the cutter is not cut off. With Zhuhai Haikong CAM2 flying shear control command, there is no need to plan the curve, and the cutting length can be set by parameters, which has greater flexibility. At the same time, the use of the CAM2 command can simplify the mechanical device, save the special controller, save the hardware cost, and at the same time, it can achieve a good effect of chasing cutting. The structure of the chasing shearing equipment is shown in the figure:
- Categories:Real-Time Information
- Author:
- Origin:
- Time of issue:2022-08-04
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Development and application of the high-level motion control command of PSDP series servo built-in PLC engine flying shear module
Flying shear control, the past practice is to plan the curve from tracking to return as a whole, reserve enough synchronization time when synchronizing, wait for the cutter to cut off, and keep the synchronization until the alarm if the cutter is not cut off. With Zhuhai Haikong CAM2 flying shear control command, there is no need to plan the curve, and the cutting length can be set by parameters, which has greater flexibility. At the same time, the use of the CAM2 command can simplify the mechanical device, save the special controller, save the hardware cost, and at the same time, it can achieve a good effect of chasing cutting. The structure of the chasing shearing equipment is shown in the figure:
working principle:
The function command internally counts the position of the feeding encoder and calculates the feeding length. At the same time, there is a speedometer inside to measure the speed of the feeding shaft. The measured speed of the feeding shaft is the Speed in the schematic diagram. When it runs to the acceleration time ITm value, the speed of the cutting shaft is the same as the speed of the feeding shaft, and the position of the feeding shaft and the cutting shaft is the same. The deviation is Speed * Itm - S1, that is, there is a position deviation between the two. According to the position deviation, calculate the speed value of overspeed, and start S2 to perform position tracking compensation. At this time, the speed of the feeding shaft is consistent with the position of the flying shear shaft from the start to this time, that is, the cutting signal is output.
X0 is used as CAM2 enable signal, X1 is used as emergency stop signal, Y0 is output as cutter signal, and Y1 is output as error.
The red curve is the position curve, the blue curve is the speed curve, and the purple curve is the cutter signal output. It can be seen from the curve that the output of each cutter is at the same position. Since the output frequency of the feeding shaft is stable, this also It shows that the stability of following is very good.
The chase action has the following states:
(1) Overspeed state: feeding continues, the PSDP servo driver CAM2 command detects the length of the feeding and the current feeding speed, and controls the servo motor to accelerate according to the S curve to synchronize with the feeding speed; at the moment of entering the synchronous speed, the system according to the position The deviation is overspeeded, so that the position deviation is gradually reduced until the S2 pulses are completed, the deviation is zero, and the synchronization state is entered.
(2) Synchronous state: Once in the synchronous state, the PSDP servo driver sends a cutter signal to the executive control mechanism to request the cutting action. At the same time, the motion controller still continuously detects the feeding length and feeding speed, and keeps the dynamic relative position between the saw/machine and the material unchanged at any time; in this way, the flatness of the cutting surface can be ensured. When the execution is completed, the mechanism returns to automatically exit.
(3) Carriage return status: During the carriage return process, the PSDP servo drive continues to detect and accumulate the feeding length.
(4) Standby state: After the carriage return is completed, the PSDP servo drive system automatically enters the standby state, waiting for the start of the next cycle.
At present, there are more and more systems that apply chase shearing, covering various industries, including corner guards in the packaging industry, steel bar chase saws in the construction industry, etc. There are a large number of successful cases with the built-in PLC engine of the operation control.
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