David Graham Hewitt
WillowBurn ·
Cuillich ·
Ardross .
Ross-shire .
IV17 0XN ·
01349 880208
Employment
2003 to Present: Self employed, trading as RF Electronics.
Offering a full range of electrical, electronic and software services
Domestic electrical wiring alterations and repairs
Full wiring for new build or conversions
Full rewiring of existing properties or renovations
Some aspects of property renovation
TV Aerial and Satellite dish installations
Home automation and home entertainment system wiring
Electronic circuit design
Industrial machinery control systems consultancy
1998 to 2003: Exitech Ltd. Senior Control Systems Engineer.
Exitech manufacture advanced laser micro-machining systems tailored to specific customers requirements.
- Design of bespoke industrial control systems
- Electrical and electronic circuit design.
- Electrical design for North America
- Design drafting using Orcad and RS Wire CAD tools
- Manufacturing supervision, testing and commissioning
- Siemens Step 7 PLC design and programming
- Industrial pneumatic control system design
- Industrial safety systems and machine guarding
- Laser control systems and laser safety systems
- HMI user interface using LCD touch screen displays
- Industrial system programming in Visual Basic
- Standard and custom high accuracy servo positioning systems
- Custom Electronic design, assembly and commissioning
- Robotic and custom designed automated parts handling systems
- ASI bus distributed industrial I/O
- Embedded microcontroller system design
- Embedded Microcontroller programming using the C language
- Design for and operation in clean room environment
1995 to 1998: Molins Tobacco Machinery Ltd. Control Systems Engineer.
Molins manufacture a range of high speed Cigarette making machinery
- High speed multi axis synchronised sevo motion control systems
- Variable speed AC drives
- Stepper motors
- Siemens Step 5 PLC design and programming
- Design of custom high speed electronic test equipment
- PCMCIA (PC Card) I/O interfacing
- Programming in Visual Basic
- Analysis of the performance of an existing machine to set a benchmark
- Design of the complete control system for a prototype new machine
- Commissioning of the prototype machine for optimised performance
- Analysis of test data to confirm improved performance of prototype machine
- Design of several new enhancements to existing cigarette making machines
1992 to 1995: Culham Laboratory Space and Defence Systems Department.
Electronics Engineer
- Space Electronics system design for scientific satellite
- High reliability and high precision analogue and digital circuit design
- Simulation and modelling of circuit performance using PSPICE
- Reliability and worst case analysis
- Schematic capture using Orcad capture and VST
- Power budget and thermal analysis
- High reliability soldering to ESA standards
- High reliability crimping to ESA standards
- High reliability rework and repair to ESA standards
- High vacuum and radiation tolerant design
1984 to 1992: Culham Laboratory Advanced Control and Power Department.
Control Systems Engineer
- Industrial control system electrical design
- Multi axis servo motor control systems
- Robotics and automated parts handling system design
- High powered industrial lasers and control systems
- Control systems for high energy particle physics experiments
- Embedded control systems using VME, S100, STE and G64 busses
- Programming in Basic, Pascal, Forth and C, under OS9, MSDOS and PDOS operating systems
- Siemens Step 5 PLC programming
- Electronic circuit design
- Novel experimental control systems using new sensor ideas
- Remote handling robotic systems for the nuclear industry
- High power servo hydraulic control system
- Signal conditioning and galvanic isolation
1983 to 1984: Engineering Division AERE Harwell. Electronics Mechanic.
- Assembly of a wide range of bespoke electronic systems
- High power experimental power supply construction
- Wiring of experimental physics experiment
- Gas control and monitoring systems
1979 to 1983: AERE Harwell. Apprentice in Electronics and control systems.
- Mechanical appreciation period operating all types of mechanical production machinery and tooling
- Welding including Oxy acetylene, MIG, TIG and Arc.
- Electrical wiring industrial and domestic
- Electrical and electronic cabinet build and layout
- Electronic wiring, soldering and crimping
- Microcontroller embedded control systems
- Drawing / design office training period
- Extensive practical on the job training period
- Attended college on block release for academic qualifications.
Education
Higher National Diploma in Electronic and Communications Engineering. 1985
Personal
Date of birth: 9th March 1963
Driving licence: Full car and motorcycle, no endorsements.
Skills
Broad range of electrical and electronic circuit design
Industrial machinery systems
Laser control and safety systems
Knowledge of current electrical, safety and machinery standards
Extensive experience of all types of motion control
PLC and microcontroller design and implementation
Programming in a variety of languages
Clean room working practices
Personal Interests
- Amateur radio, all forms of electronics and computing, website design
- Outdoor pursuits in particular hill walking, camping and caravanning
- Serious DIY projects. Just sompleting a self build house
- Sailing a small sailing cruiser in the Moray Firth