Resistance & Spot Welding Controls
Serving North AmericA since 1983
Resistance & Spot Welding Controls Distributor
Precision Timing and Heat Control for Every Industrial Application
At Spotco, we understand that the control system is the "brain" of your welding operation. Whether you are retrofitting a legacy rocker arm welder or engineering a new automated production line, the right control ensures repeatability, reduces scrap, and guarantees weld integrity.
As an authorized distributor for the industry’s leading manufacturers, we provide expert selection guidance and technical support for a wide range of AC, DC, and MFDC control systems.
Our Leading Control Partners
We distribute and support the most trusted brands in resistance welding. Each manufacturer offers unique advantages, from intuitive "push-button" setups to advanced constant current and safety-integrated systems.
Entron Controls
Known for their "design simplicity," Entron Controls are the industrial workhorses of the welding world. They are highly favored for their ease of programming and long-term reliability.
- Key Products: EN1000 Series (the industry standard), EN6001 Constant Current Controls, and iPAK Medium Frequency DC Inverters.
- Why Choose Entron: Their controls feature multiple schedule capabilities (up to 50 unique programs), vault-locking cabinets for security, and specialized retrofit kits that can modernize almost any existing machine in under 30 minutes.
Unitrol Electronics
Unitrol is the pioneer of safety-integrated welding. Their systems are designed to eliminate complex ladder logic and PLC programming, replacing them with intuitive, English-language interfaces.
- Key Products: SOLUTIONi, Solution 2, and the specialized Soft Touch Safety System.
- Why Choose Unitrol: The "Solution" series asks the operator questions (material type, gauge, etc.) and automatically sets the RWMA welding schedule. Their Soft Touch technology is a passive safety system that prevents pinch-point injuries without slowing down production cycles.
PW Resistance Welding Products (formerly PW Portable Welders)
With decades of engineering excellence, PW focuses on robust, high-performance control systems specifically optimized for portable and suspended spot welding applications.
- Key Products: Integrated timers for suspended spot guns and precision micro-welding controls
- Why Choose PW: Their controls are built for durability in harsh manufacturing environments. They are the preferred choice for heavy-duty industrial sheet metal joining and aerospace-class applications where mobility and precision must coexist.
Techna International (TECNA)
TECNA is a global leader in microprocessor-based welding controls, offering some of the most advanced inverter technology (MFDC) in the industry.
- Key Products: TE90 Mark II, TE101, TE550, and the high-end TE750 Microprocessor Control Units.
- Why Choose Techna: TECNA controls provide unparalleled management of parameters, including secondary current compensation and up to 300 storable programs. Their units are ideal for complex materials like aluminum and high-strength steels, offering superior energy efficiency.
Got a question or want to check our inventory? Give us a call or contact us now!
Key Areas of Expertise
When you partner with Spotco for your control needs, you gain access to our deep technical knowledge in several critical areas:
- Retrofit & Modernization: Don't replace a perfectly good machine frame just because the electronics are dated. We specialize in retrofitting legacy welders with modern Entron or Unitrol controls to improve accuracy and data logging.
- Constant Current Technology: We provide controls that automatically adjust for fluctuations in line voltage or changes in the secondary circuit, ensuring every weld nugget is identical.
- Safety Compliance: We help shops meet OSHA standards by integrating "Soft Touch" technology and secure locking mechanisms into their control architecture.
- Multi-Schedule Programming: For shops running various parts on a single machine, we provide controls capable of storing hundreds of unique schedules, allowing for instant changeovers.
FREQUENTLY ASKED QUESTIONS
At Spotco, we believe in total transparency and expert support. Explore our frequently asked questions to learn more about our North American supply capabilities, certified training seminars, and precision hardware.
Why Choose Spotco?
Serving North America, we are your go-to welding company and resistance welding supplier. With our unwavering commitment to delivering exceptional spot welding company services and equipment, Spotco has earned a reputable standing in the welding company industry. When it comes to welding companies, Spotco is the best choice. We offer welding company services for the North American market.
We are known for our high knowledge of the processes involved as well as the latest technologies being used to increase product productivity while decreasing welding process cost. Contact us today for more information and welding process review.
What is the difference between AC and MFDC welding controls?
AC (Alternating Current) controls are the traditional standard for most steel applications. MFDC (Medium Frequency Direct Current) inverters, like the Entron iPAK or TECNA units, provide a more stable current, better energy efficiency, and superior results on non-ferrous metals like aluminum.
Can I retrofit a new control onto my old welding machine?
Yes. We specialize in retrofitting legacy rocker arm and press welders with modern Entron or Unitrol digital controls. This is a cost-effective way to add modern features like constant current, data logging, and improved safety without replacing the entire machine.
What makes Unitrol "Soft-Touch" different from other safety systems?
Unlike light curtains or physical guards that can be bypassed or slow down production, Soft-Touch is integrated into the control logic. It detects if an obstruction is between the electrodes using low-force sensing, preventing the high-force welding cylinder from firing if your finger is in the way.
Do these controls support "Constant Current" welding?
Absolutely. Many of our Entron and TECNA models feature secondary constant current compensation. This ensures that even if there are fluctuations in your shop’s power or changes in the secondary circuit (like tool wear), the weld nugget remains consistent.
How many weld schedules can these systems store?
Most of our digital controls, such as the Unitrol Solution series, can store dozens or even hundreds of unique weld schedules. This allows your team to switch between different material gauges or parts instantly without manual recalibration.
Are these controls compatible with robotic welding cells?
Yes. We provide controls specifically designed for integration with automated and robotic systems. These units often feature industrial communication protocols (like EtherNet/IP or DeviceNet) to sync seamlessly with your plant's PLC architecture.
How do I choose between an Entron and a Unitrol control?
It often comes down to your specific application and operator preference. Entron is known for its rugged simplicity and "set-it-and-forget-it" reliability, while Unitrol is preferred for its intuitive, English-language programming and built-in safety features.
Still have a question about our Control Systems?
Trying to decide between the rugged simplicity of an Entron EN1000 or the safety-integrated Unitrol Solution series? Whether you need to choose the right TECNA inverter for aluminum welding or require advice on retrofitting a legacy machine with a modern digital timer, our technical team is here to help. Contact us today to discuss which control architecture will best transform your welding operation into a safer, more efficient powerhouse.