Difacto Robotics and Automation Senior Engineer Interview Questions and Answers

Q1. Which brand of PLC have you worked with?
Ans. 
I have experience working with Siemens and Allen-Bradley PLCs, focusing on automation and control systems.
• Worked extensively with Siemens S7-1200 series for industrial automation projects.

• Utilized Allen-Bradley ControlLogix for complex control systems in manufacturing.

• Gained hands-on experience in programming using Ladder Logic and Function Block Diagram.

• Implemented HMI integration with PLCs for real-time monitoring an...read more
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Q2. What is the process for replacing a robot motor?
Ans. 
Replacing a robot motor involves assessment, disassembly, installation, and testing to ensure proper functionality.
• 1. Assess the motor: Identify the type and specifications of the motor to be replaced.

• 2. Gather tools: Collect necessary tools such as screwdrivers, wrenches, and safety gear.

• 3. Power down the robot: Ensure the robot is turned off and disconnected from any power source.

• 4. Disassemble: Carefully remove any ...read more
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Q3. What types of starters are used to initiate an induction motor?
Ans. 
Induction motors use various starters to manage starting current and torque, ensuring smooth operation and protection.
• Direct-On-Line (DOL) Starter: Simple and cost-effective, suitable for small motors.

• Star-Delta Starter: Reduces starting current, ideal for larger motors.

• Auto Transformer Starter: Provides variable voltage for smooth starting, used in high-power applications.

• Soft Starter: Controls voltage and current gra...read more
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Q4. What is a stepper motor, and what are PWM signals?
Ans. 
A stepper motor is a type of motor that moves in discrete steps, while PWM signals control the power delivered to devices.
• Stepper motors are used in 3D printers for precise movement.

• They can be controlled by sending a series of pulses.

• PWM (Pulse Width Modulation) signals vary the width of the pulses to control power.

• PWM is commonly used in motor speed control and LED dimming.
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Q1. Why do you want to change your job?
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Q1. What are your experiences in machine maintenance and troubleshooting
Ans. 
I have extensive experience in machine maintenance and troubleshooting, including working on various types of equipment.
• Performed regular maintenance checks on machines to ensure optimal performance

• Identified and resolved mechanical issues to minimize downtime

• Utilized diagnostic tools and equipment to troubleshoot problems

• Collaborated with team members to develop preventive maintenance plans

• Trained new employees on mac...read more
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Q1. Personal & work related
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Mathematics & science

Q1. Work related technical questions
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Q1. About different types of sensors, about power factor. APFC, fundamental electrical and electronics such as uses of capacitor in a electronics card,uses of multimeter, meggar, based on what you show in your...read more
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Q1. For installation department 1- Levelling and alignment of conveyors 2- brief knowledge of sensors 3- knowledge about rollers, bearings, cylinders, Solenoid, motors, sprocket. 4- knowledge about join...read more
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Q1. All about Tia Portal & some logic
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Q1. Describe designing of Conveyors
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Q2. Iso questions
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