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Tahir Industries, Gujranwala, Pakistan. (Jan 2020 - Sept 2021)
Design Engineer (Part-time work along with teaching at UCP):
Designed, programmed and fabricated the control system of a PLC-based CNC lathe machine. Manufactured the complete distribution box for the machine.
Solely involved in wiring, ladder programming of PLC, programming of HMI, and tagging of HMI to PLC, and troubleshooting the system.
Used RS-232 and RS-485 communication protocols for HMI/VFD to PLC communication.
Designed pneumatic/hydraulic circuits associated with the machine.
PLCs
Mitsibushi FX-3GA (MR/MT) (Japanese PLC)
LS Master-K 120S (South Korean PLC)
Xinje (Chinese PLC)
Allen Bradley MicroLogix 1000
Softwares:
GX Developer for Mitsibushi PLC
RSLogix, RSLinx, RSLogix Emulate for Allen Bradley PLC
KGL Win
DOPSoft software for HMI Design (Delta HMI)
Actuators Used:
Directional control valves (pneumatic/hydraulic)
Variable Frequency Drive (D700 Mitsubishi)
AC servo motor (Mitsibushi)
Stepper motors (NEMA 23 / 34 motors)
3-Phase induction motor
Sensors / Inputs Used:
Inductive proximity sensors (NPN, PNP)
push buttons
Limit switches
Incremental Encoder
Human Machine Interface (Delta HMI, Designed HMI on DOPSoft Delta software)
Other Devices Used:
Industrial relays (NO, NC)
24V power supply
Miniature circuit breaker
Overload / phase-change protection relay
Magnetic contactor
24V MOSFETS for fast switching
This Distribution Box was designed and wired by me. It consisted of Master K PLC, 24V power supplies, relays, MCB, Magnetic Contactor. The Ladder program was written by KGL_WE software.
WhatsApp Video 2021-10-14 at 10.58.49 PM.mp4
This PLC-based CNC machine was designed and manufactured in china for making different type of part. I reprogrammed this machine (Mitsubishi PLC FX-3GA-40MR) according to the design specifications of the spindle (The part to be manufactured by the machine). The HMI was all wiritten in Chinese. I redesigned the HMI ising DOPSoft software and included local language (Urdu) and English to the HMI. The HMI is connected to PLC using RS232 protocol cable.
This PLC based CNC machine PLC-based is completely manufactured in Pakistan. The hardware was manufactured by workshop and all the electrical PLC programming and sensor actuator work is done by me. The complete distribution box is designed and wired by me. The PLC used in this is LS (Master K PLC).
Hydraulic Directional Control Valves were controlled by PLC outputs . The Ladder Logic code was implemented on Mitsibushi PLC.
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