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sunit

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sunit last won the day on November 3 2018

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About sunit

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  • Birthday 10/05/1982

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    PLC AND SERVO PROGRAMMER

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  1. I thank the Unitronics team for making me the part of the beta project.
  2. System Integrator :- Shriram Automation Application: - Auto punching on channels up to 8m. Hydraulic press: - Three press with different punches. Servo motor:- 2 , Pusher and Puller. The pusher and puller motor were use to do indexing of channel. PLC :- US7-B5-TA30 SERVO MOTOR & DRIVE :- UNITRONICS This application is for punching holes on a 8m channel with three different punches. The hole profile of every press varied from job to job. The objective of this machine was to punch all three types of hole on the channel during a single feed to increase production. It only took 40s to punch a 8m long channel. The channel is loaded in the machine and the pusher servo starts pushing the job in the punch die at the same time making indexing movements as per hole distance. All the three press were in a line and after every indexing a press use to punch a hole in the channel depending on the program. Program :- For 3m channel PRESS 1 PRESS 2 PRESS 3 27.0 500.0 100.0 950.0 1000.0 2900.0 1900.0 1500.0 2850.0 2000.0 2500.0 The PLC used for the application was the 7” Unistream , the most powerful and user friendly controller. Advance features of the Unistream were use to build this application and a user friendly interface. The controller automatically calculated the indexing position for the pusher and puller as per the hole distances. Once the pusher reaches its extreme end limit the puller comes into action by pulling out the remaining part of the channel out from the punch die while continuing its indexing for the remaining holes. There were several advantages of using unitronics in this application. The PLC and servo drive used the CANopen communication eliminating the limitations of a PTO. All the drive parameters were accessible from the PLC making it easy to modify them. All in one software was an awesome advantage of using unitronics. PLC , servo drive , HMI screens , VNC server, USB & SD card everything was configured using a single platform. This helped in keeping the track of the program. Advance features of the unistream were used in this application. The punch program was created on a PC . The program file was copied in a USB stick and transferred to the table in the PLC. This feature reduced the down time between job change over. VNC was used to operate the machine from a mobile making it convenient for the operator to start stop the machine from any location. The servo motors were with absolute encoder which did not required doing homing after power failure. The program can be resumed from its last position after power on.
  3. Dear Friends, I require a sample program of SQL connection with UniStream PLC and how to run queries.
  4. Transferring autocad coordinates to excel file . Importing that excel to data table.
  5. I REPLACED A CNC CONTROLLER WITH V130-J-TR34 FOR CONTROLLING X,Y TABLE OF AUTO PUNCHING MACHINE FOR SHEET METAL. FEATURES 1. AUTO , SEMI AUTO , MANUAL MODE 2. SYNCHRONIZING THE X,Y TABLE WITH THE PRESS MACHINE. 3. SHEET METAL SIZE 2M x 2M UPTO 1000 HOLES POSITION CAN BE STORED 4. AUTOCAD FILE CAN BE TRANSFERRED TO PLC
  6. Replaced one more CNC controller with V130-J-TR34 It was a Auto Punching Machine for metal sheets. The CNC controller of the X,Y table failed. The X,Y table had two servo motors. I used the V130-J-TR34 for this application. Customer wanted to transfer the AutoCad drawing directly to the PLC. So i used some tools from unitronics site to convert autocad file to excel file and then transferring the excel to PLC. The idea worked and now the machine is running.
  7. Hi all friends Till now i have used almost 250 to 300 unitronics PLC which consist of V130, V350, V570, V1040. The best in this i feel is the V130, V350. I have got failure in only 3-5 PLC till now. The best thing about unitronics is its very reliable and has a very strong ladder development software which is free for users. It also has other set of softwares which are very useful for project development. I can easily make my own software in VB or VB.net and connect to my unitronics plc for doing different type of applications. There is a big scope of doing adventurous development in unitronics. The info mode is the best feature in the unitonics plc , i can do trouble shooting in my plc sitting in my office and talking to my customer on phone. The SD card is also one of the best feature in this segment. S7-200 , AB and other big brands do not have such features in this segment.
  8. Aluminium extrusion Machine My customer had a complete automatic aluminium extrusion machine which had a S7-300 in main extrusion machine and two S7-200 PLC in conveyor system. The conveyor system has a trolley which travels 40m in both direction in high speed. There were some hydrollic system on the trolley which use to clamp the aluminium profile and pull it out of the extrusion machine. The trolley use to automatically synchronized with the speed of the extrusion. There was one more S7-200 plc in trolley system which use to control the hydrolic system in the trolley. Both the PLC in the trolley as well as the main panel were connected to each other through a bus bar system to exchange communication signals while the trolley was moving. Trolley use to have frequent breakdowns due to communication error between the plc. I was given this task to make this system more durable. The first thing i did is replaced both the S7-200 plc with V130 PLC. In the trolley we installed the V130-j-TR20 and in main panel we installed V130-J-TR34 with IO_AI4_AO2. Then we developed a new program and synchronized every thing with the extrusion machine as it was before. V130-J-TR20 was in the trolley and V130-J-TR34 was in main panel and they need to be communicated with each other so that all trolley function should work. The previous system was bus bar system and was causing frequent problems, so i decided to go for a wireless communication system. I took two simple TP-link routers and installed one in trolley with v130-tr20 and other in main panel with v130-tr34. Then i setup a modbus ip link between them and exchanged all my signal between them. See the link of the video below https://www.facebook.com/shriramauto/videos/927412653974856/ https://www.facebook.com/shriramauto/videos/927412367308218/ https://www.facebook.com/shriramauto/photos/pcb.927396570643131/927395883976533/?type=3 https://www.facebook.com/shriramauto/photos/pcb.927396570643131/927395853976536/?type=3 https://www.facebook.com/shriramauto/photos/pcb.927396570643131/927395827309872/?type=3 Now the system is working perfectly and once again unitronics proves that it is the best and most user friendly PLC.
  9. Yes but we will require PWM outputs in order to control the RPM of the motors. Inputs are not required. My handheld V350 will send communication messages to the v130 in the plane with the help of xbee communication module in order to control the RPM of motors.
  10. I want to use a V130 plc as a reciver in a RC plane. Is it posible to power the plc on a 12v battery 1. I will be using a v130 cpu and IO board 2. 4 BLDC motors with ESC 3. xbee moudle for wireless communication. 4. 12v battery Please suggest me if this is posible.
  11. A Samba 70 has a USB programming port and one optional port for Ethernet or RS232/485. I want to install a ethernet port but at the same time i want to use the USB programming port for MODBUS RTU to communicate with a remote IO by using a USB to RS485 converter, Is this posible?
  12. For such application you actually require a hardware input interrupt subroutine, This type of subroutine trigers on every rising or falling edge of the input. In unitronics we don't have such subroutine. You can use a read immediate input function but action will be taken as per scan time of PLC. Minimum time will be 1.25mS. 2nd profile is posible because the speed is very slow before stoping, But in 1st profile there may be some errors as speed is very high and it may miss the stop plus because it will be scaned every 1.25 mS. I had tried using a V130-J-TR20 for labeling application but i had problems while stoping plus.
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