PLC

Simulation : Automatic Welding Machine

Remarks :
1. Movement1 : Cylinder Clamp Left AND Right to Middle
2. Movement2 : Cylinder Ejector Down
3. Movement3 : Cylinder Clamp Left AND Right to Forward
4. Movement4 : Cylinder Nozzle to Middle
5. Movement5 : Cylinder Nozzle to Forward AND Welding Torch=ON
6. Movement6 : Cylinder Nozzle to Middle
7. Movement7 : Cylinder Nozzle to Reverse
8. Movement8 : Cylinder Clamp Left AND Right to Middle
9. Movement9 : Cylinder Clamp Left AND Right to Reverse
10. Movement10 : Cylinder Ejector Up

Detail of Automatic Welding Machine

Legend for Detail of Automatic Welding Machine :
1. Raw Material for Welding
2a/2b. Push Button Start (Normally Open Contact)
2a. Start-1 (PB1)
2b. Start-2 (PB2)
NOTE: Push Button Start-1(PB1) And Push Button Start-2(PB2) Connected in Series
3a/3b. Safety Sensor
3a. Safety Sensor Receiver
3b. Safety Sensor Transmitter
NOTE: If NO OBJECT Then Safety Sensor=ON Else Safety Sensor=OFF
4. Cylinder Clamp Left
5. Cylinder Clamp Right
6. Limit Switch (LS) Clamp Left Reverse
7. Limit Switch (LS) Clamp Left Middle
8. Limit Switch (LS) Clamp Left Forward
9. Limit Switch (LS) Clamp Right Reverse
10. Limit Switch (LS) Clamp Right Middle
11. Limit Switch (LS) Clamp Right Forward
12. Cylinder Ejector
13. Cylinder Nozzle (for welding nozzle)
14. Limit Switch (LS) Ejector Up
15. Limit Switch (LS) Ejector Down
16. Limit Switch (LS) Nozzle Reverse
17. Limit Switch (LS) Nozzle Middle
18. Limit Switch (LS) Nozzle Forward
19. Welding Machine, such as GMAW(Gas Metal Arc. Welding)
20. Panel Box
21. Welding Nozzle / Welding Gun / Welding Torch

Example GMAW Welding: use MIG Welding
Circuit diagram of MIG Welding to PLC Output with contactor
Contactor coil to PLC Output and Contactor contact (NO) to Torch Button of MIG Welding

PLC Input and Output Devices :
1. PLC Input :
<-> 1 Input for Emergency Stop Button
<-> 1 Input for Push Button Start
<-> 1 Input for Safety Sensor
<-> 1 Input for Limit Switch Clamp Left Reverse
<-> 1 Input for Limit Switch Clamp Left Middle
<-> 1 Input for Limit Switch Clamp Left Forward
<-> 1 Input for Limit Switch Clamp Right Reverse
<-> 1 Input for Limit Switch Clamp Right Middle
<-> 1 Input for Limit Switch Clamp Right Forward
<-> 1 Input for Limit Switch Ejector Up
<-> 1 Input for Limit Switch Ejector Down
<-> 1 Input for Limit Switch Nozzle Reverse
<-> 1 Input for Limit Switch Nozzle Middle
<-> 1 Input for Limit Switch Nozzle Forward
--> Total PLC Input, minimum of 14 Input.

2. PLC Output :
<-> 1 Output for Contactor to Torch Button of MIG Welding
<-> 1 Output for Solenoid to Clamp Left Reverse
<-> 1 Output for Solenoid to Clamp Left Forward
<-> 1 Output for Solenoid to Clamp Right Reverse
<-> 1 Output for Solenoid to Clamp Right Forward
<-> 1 Output for Solenoid to Ejector Up
<-> 1 Output for Solenoid to Ejector Down
<-> 1 Output for Solenoid to Nozzle Reverse
<-> 1 Output for Solenoid to Nozzle Forward
--> Total PLC output, minimum of 9 Output.