Portfolio Viktor Skundrik

portfolio.

Viktor Skundrik 2014-2024

SPECIALIST IN INDUSTRIAL 3D PRINTER DEVELOPMENT 01

Introduction I am a mechanical engineer specializing in the development of industrial 3D printers and CNC machines. My experience in this field began in 2014 when construction 3D printers were considered futuristic and only mentioned in magazines as a distant prospect.

Since then, I have worked with a variety of mechanical systems, ranging from radial motion mechanisms to designing and sourcing fully customized pumps for precise dosing of printing mixtures. Each project is a challenge that requires a non-standard approach and a deep understanding of technology.

I always rely on my practical experience as a technologist. In the early stages of development, I often personally assembled experimental working prototypes to gather highly accurate feedback and later write detailed maintenance instructions. This approach not only helped me better understand the mechanisms but also evaluate their real-world efficiency.

In professional circles, I am sometimes referred to as a "jack of all trades." This is because, with my experience, I can solve the same task in a dozen different ways. Over my career, I have mastered many technologies, and my journey began long before the era of 3D printers. Back in 2010, as a student, I started my professional path by manually riveting tens of thousands of rivets for the center wing sections of the Su-30 at an aircraft factory. These years laid the foundation for my engineering approach: practicality, precision, and a deep understanding of manufacturing processes "from the inside."

Today, I possess extensive knowledge in creating technical documentation and have an excellent understanding of the production process chain. One of my key strengths is the ability to quickly solve manufacturing problems — whether it’s developing equipment from scratch or optimizing existing systems.

By nature, I am a logical thinker who prefers to solve problems through numbers, calculations, and precise metrics. At the same time, I am sociable, adapt easily to new teams, and am ready to work collaboratively. I prefer having too much work over not having enough, as complex tasks drive professional growth.

My goal is simple yet ambitious: to develop equipment that helps companies achieve new levels of reliability, efficiency, and quality. I don’t just solve current problems but design technologies that can shape the future.

02

03

Technical Skills: Working with specialty materials and composites.

Development of technological processes.

Design and fabrication of custom parts from ultra-hard ceramics.

Design of ultra-lightweight gear reducers and their gearing systems.

Development of unique screw pumps.

Development of unique piston pumps.

Design of sealing units for use with high-hardness abrasive liquid.

Creation of high-dynamic CNC machine positioning systems.

Design of systems for linear guides and ball screw drives.

Creating metalworking stations from scratch, fully equipped with cutting equipment.

Software Skills: 3D modeling Proficiency in CAD software: SolidWorks, AutoCAD Finite element analysis (FEA) Microsoft Word Slack Exel

Soft Skills: Conducting Technical Training.

Leadership and Team Management: Experienced in leading the development of assemblies and components within teams of up to 7 people.

Training and Development: Skilled in conducting technical training sessions for groups, enhancing team competence and performance.

Collaborative Teamwork: Demonstrated ability to work collaboratively in a team setting, contributing to team objectives while supporting and enhancing group dynamics.

Problem Solving: Strong analytical skills with the ability to tackle problems creatively and effectively.

Able to analyze the readiness of complex projects and prevent mishaps.

Able to create an active atmosphere within the team.

04

Projects

Project Title: Large-Scale CNC Milling Machine for Cutting Large MDF Furniture Panels

Duration: Approximately during student years, around 2013.

My Role: Solo project. Managed all aspects from welding the frame and scraping it, to installing profile guides and gear racks, and finally mounting the servo drives.

Project Description: The CNC milling machine has a work area of 4500 x 2500 x 250 mm, equipped with a 6 kW spindle that features water cooling through a chiller and a BT 30 tool changer. The table is interchangeable with vacuum holding for workpieces, made from MDF. It uses a Newker CNC system, Hiwin profile guides, and synchronous servo drives with incremental encoders that communicate via the Step-Dir protocol.

The frame weighs approximately 3 tons and provides exceptional rigidity on the cutting tool, with a specific stiffness of 1.5-2.5 Newton microns, which is extremely high for woodworking.

Technologies and Methodologies Used: The project was drafted in AutoCAD with all layouts, without the use of 3D graphics or modeling. The construction techniques included MIG/MAG welding, abrasive cutting, use of precision tools, surface scraping for guide installation, work with a laser autocollimator, wiring for power and signal electronics, shielding signal lines, and commissioning the CNC system. Pneumatics were also employed.

Challenges: Immediately after launching, it was necessary to involve an external specialist for precise servo drive tuning, as the initial results from the Ball Bar test were suboptimal.

Results and Achievements: To this day, the machine continues to operate in a small company in Irkutsk, Russia. It has undergone one replacement of profile guides due to wear.

06

07

Project Title: Apis Cor Print Heads

Duration: Samples from 2015-2019, until the company relocated to the USA.

My Role: Developed drawings and prototypes.

Project Description: Swiveling print heads designed for printing with concrete mixtures.

The latest versions were equipped with a mechanized smoothing device. They featured a rotary ceramic unit and an integrated ceramic sealing system. Additional features included servo drives, gear transmission, and a built-in mechanical system with sensors to prevent breakage upon collisions.

Technologies and Methodologies Used: The design was initially carried out in AutoCAD, followed by modeling in SolidWorks and prototyping.

Results and Achievements: Following the printing of a project in Dubai, the equipment was sold to the Emirates and has since undergone numerous modifications.

08

09

Project Title: Apis Cor Dosing Pumps

Duration: Samples from 2017-2019, until the company relocated to the USA.

My Role: Developed drawings and prototypes.

Project Description: Servo-driven screw dosing pumps specially designed for construction 3D printing.

The screw pair used in these pumps is unique and not found in any other industrial sector. The pumps were equipped with an integrated ceramic sealing system.

Technologies and Methodologies Used: The design process began in AutoCAD, followed by modeling in SolidWorks and prototyping.

Results and Achievements: After the printing of a project in Dubai, the equipment was sold to the Emirates, and the current status of its usage is unknown.

Текст абзаца

10

Project Title: Pallet Wrapper

Duration: 2020

My Role: Developed drawings and a prototype.

Project Description: Designed to simplify the process of film packaging. It operates without electricity and is intended for use in nonelectrified warehouses.

Technologies and Methodologies Used: The frame is welded with a maximally simple design. It features an adjustable disc-type brake. The structure is finished with powder coating.

Results and Achievements: Several dozen units have been implemented across related enterprises. It is an extremely simple and low-cost design. Since its creation, it has remained unchanged and unmodified.

Project Title: Heavy-Duty Milling Machine for Processing Laser Machine Frames

Duration: 2020-2021

My Role: Developed all drawings and participated in the construction process.

Deep FEA of Structures.

Project Description: The machine features a working area of 5500 x 2800 x 800 mm and weighs 38 tons. It includes a drive spindle with a controllable gearbox, spindle speeds ranging from 0-2500 and 0-12000 RPM, and a spindle power of 12 kW. The linear deviation over a length of 5500 mm is 40 microns, with flatness across the entire working field within 100 microns. Initially used with stepper drives without feedback, it has now been upgraded to servo drives. It features an innovative vibration-absorbing coating and is designed for milling surfaces under profile guides and gear racks, as well as milling end surfaces for adjoining frames.

Technologies and Methodologies Used: MIG/MAG welding, heavy mechanical processing, precision scraping of surfaces, design and assembly of spindle units and transmissions to them, development of rail hydraulic systems for transporting super-heavy oversized parts.

Results and Achievements: The machine has been put into operation and, in addition to producing machine frames, now manufactures large-dimension matrices for molding monocoques for military drones.

Project Title: Full-Size Laser Machine

Duration: 2021

My Role: Developed drawings, performed machining, and installed liner guides.

Project Description: The machine features a working area of 6000 x 1600 x 100 mm and weighs 8 tons. The frame is composed of two parts. The machining was completed within a day by utilizing the previous machine.

Technologies and Methodologies Used: MIG/MAG welding, heavy mechanical processing, and assembly of precision mechanics.

Results and Achievements: The machine has been successfully launched into operation.

The installation of servo drives, electrical systems, and equipment was carried out by others.

Project Title: Hydraulic Transportation System

Duration: 2021

My Role: Developed all drawings, performed machining, and assembly.

Project Description: A hydraulic cart designed for loading frames into a milling machine. It has a maximum transport capacity of 10 tons and features the ability to lift and lower the workpiece.

Technologies and Methodologies Used: MIG/MAG welding, heavy mechanical processing, and hydraulic assembly.

Results and Achievements: The system has been successfully launched into operation.

Project Title: Hydraulic Grinding Machine

Duration: 2021

My Role: Developed all drawings, performed machining, and assembly.

Project Description: A grinding machine designed for cleaning large surfaces of rust and corrosion marks. It has a nominal power of 4 kW and a belt speed of 45 meters per second.

Technologies and Methodologies Used: TIG welding, mechanical processing, and hydraulic assembly.

Results and Achievements: The technology did not become popular due to the high cost of the technology and consumables. The issue was subsequently resolved by installing a shot blasting unit.

Project Title: High-Intensity Ultraviolet Lamp for 3D Printing Duration: 2024 My Role: Developed drawings and models for the latest high-power versions, repeatedly performed assembly and maintenance.

Project Description: An ultraviolet lamp of extremely high power, designed to enhance the curing process in 3D printing applications.

Technologies and Methodologies Used: Design of components for 5-axis milling and electrical discharge machining. Soldering of LED matrices.

Project Title: Restoring Station

Duration: 2023

My Role: Developed all drawings and models, repeatedly performed assembly and maintenance.

Project Description: The restoring station is designed for the recovery and relocation of printing materials. It is integrated with a piston pump that I designed and assembled.

Technologies and Methodologies Used: Design of components for milling, turning, and electrical discharge machining. Application of chrome coatings and various types of surface hardening.

Results and Achievements: The station is currently in use.

Project Title: Screw Dosing Pump

Duration: 2023

My Role: Developed all drawings and models, repeatedly performed assembly and maintenance. Assembled a testing rig and spent one and a half years solving sealing issues.

Project Description: The screw pump is designed for dosing construction mixtures during the 3D printing process. It features innovative solutions in the sealing assembly.

Technologies and Methodologies Used: Design of components for milling and turning processes. Design and manufacture of unique custom products from chemically resistant rubbers. Design and production of screw pairs.

Application of chrome coatings, various types of surface hardening. TIG welding. Development of testing rigs for analyzing the durability of components.

Results and Achievements: The pump is currently in use.

Project Title: Tanks for High-Viscosity Chemical Liquids

Duration: 2022

My Role: Developed all drawings and models. Performed modifications.

Project Description: Designed for the storage and mixing of high-viscosity chemical liquids. Made from stainless steel, the tanks range in volume from 500 to 1500 liters.

Technologies and Methodologies Used: Design of components for turning processes and TIG welding.

Work involved bending on a rolling machine. Electropolishing.

Results and Achievements: The tanks are currently in use.

Project Title: Test Press for Analyzing Construction Panels

Duration: 2024

My Role: Developed drawings for the frame and models. Assembled the frame and adapted the hydraulic cylinder. Did not participate in the assembly of the CNC console and hydraulics.

Project Description: Designed for testing construction panels. Maximum force capacity of 12 tons. Piston stroke of 400 mm.

Technologies and Methodologies Used: Design of metal structures, turning processes. MIG/MAG welding. Working with hydraulic lines.

Results and Achievements: The press is currently in use.

Project Title: Collapsible Radiation Meter

Duration: 2024

My Role: Developed the kinematic scheme, all drawings, and models.

Assembled the prototype and fine-tuned its operation.

Project Description: Designed to measure radiation levels in the printing field.

Features automation for isolating the sensor matrix.

Technologies and Methodologies Used: Design of kinematics, working with turned and milled parts, TIG welding, pneumatic kinematics.

Results and Achievements: The device is currently in use.

Project Title: Degassing Unit for Micro-Arc Oxidation

Duration: 2020

My Role: Developed the kinematic scheme, all drawings, and models.

Assembled the prototype and fine-tuned its operation.

Project Description: Designed for agitating workpieces in alkaline solutions. Used for the micro-arc oxidation technology of titanium and aluminum alloys.

Technologies and Methodologies Used: Design of kinematics, working with turned and milled parts, TIG welding, pneumatic kinematics.

Results and Achievements: The unit is used in the defense industry.

Project Title: Polymerization Parameter Measurement Stend

Duration: 2024

My Role: Developed all drawings and models. Assembled the prototype and fine-tuned its operation.

Project Description: Designed for ultraviolet exposure of laboratory samples.

Technologies and Methodologies Used: Design of optical components, turning and milling parts, assembly, and soldering of LED matrices.

Results and Achievements: The device is currently in use.

Publications U.S. patent number 10,690,156 Precision power movement locking device

Link

HOBBY

During weekdays after work, I usually engage in various tabletop hobbies. Before moving to Mexico, I was actively involved in the restoration of 19th and 20th-century wine corkscrews, primarily from England (such as Thomason, Henshall, and Lund), France (like Perille, Zig-Zag, LE DESIRE), and occasionally from Germany (Monopol, D.R.G.M. ). From 2018 to 2022, I restored approximately 150 corkscrews. The restoration process included bronze casting, turning, forging, gas-flame soldering, and artificial aging.

After moving to Mexico, I took up simpler hobbies; I assemble various drones and go to the mountains on weekends.

I appreciate your consideration and look forward to the possibility of discussing this exciting opportunity with you.