Resistance Welding Controls available from Weld Systems Integrators, Inc.

ENTRON Controls, LLC. develops and manufactures advanced weld controls for automotive, industrial and consumer products. ENTRON is working with weld machine integrators and end-users to bring our new control products for Servo-driven applications and Risk Reduction to the manufacturing floor.

Partner Logo - Entron | Weld Systems Integrators
EN6001 Constant Current AC Controls EN6001 Retrofit Kit EN7000 Constant Current AC Controls with Advanced Features iPAK Medium Frequency DC Inverter Controls Smart Detection™ System
ENTRON Controls - EN6001 | Weld Systems Integrators ENTRON Controls - EN7000 | Weld Systems Integrators ENTRON EN-6011 Retrofit | Weld Systems Integrators ENTRON Controls - IPAK - MFDC | Weld Systems Integrators ENTRON Controls Smart Detection System | Weld Systems Integrators

Weld Systems Integrators is a distributor of ENTRON resistance welding controls, keeping an inventory of IN-STOCK at our Warrensville Heights, Ohio location for quick shipment and delivery.

Single-Phase AC Resistance Welding Controls

EN6001 Constant Current AC Controls

ENTRON Controls - EN6001 | Weld Systems Integrators

ENTRON EN6001 Single-Phase AC Constant Current Resistance Welding Controls available from Weld Systems Integrators now has more features and improved user interface.

USB backup Port

  • Schedule Number: 0 to 63
  • Squeeze Delay: 0 to 99 cycles
  • Squeeze: 0 to 99 cycles
  • Valve Mode: None / All combinations of 3 valves
  • Weld1: 0 to 99 cycles
  • Weld1 Current Regulation Mode: Phase Shift / Constant Current
  • Heat1: 0 to 99%
  • Current1: 0 to 100.00 kA
  • Cool1: 0 to 99 cycles
  • Slope: 0 to 99 cycles
  • Weld2: 0 to 99 cycles
  • Weld2 Current Regulation Mode: Phase Shift / Constant Current
  • Heat2: 0 to 99%
  • Current2: 0 to 100.00 kA
  • Cool2: 0 to 99 cycles
  • Hold: 0 to 99 cycles
  • Off: 0 to 99 cycles
  • Impulses: 1 to 99 cycles
  • Heat/Current Offset: -15 to +15%
  • Cycle Mode: Non-repeat / Repeat / Chained / Successive / Wait-here
  • Program Lockout (key switch)
  • Operation Mode Switch (Program Lockout and Weld/No Weld)
  • Error Reset Switch
  • Optional plug-in Ether- net/RS232/RS485 cards provides PLC compatibility via MODBUS and EtherNet/IP for remote I/O
  • Constant current regulation / Secondary feedback
  • Current monitoring with high, low, and pre-limits
  • Up to 64 programs (internal or external selection)
  • On Timer Membrane Keyboard with backlit 128×64 (8 lines) LCD graphic display
  • Six (6) inputs and four (4) outputs with output protection on CPU
  • Electrode management functions, including stepping, current and force counting, tip-dressing and preset curves
  • Welding programs may be linked together for complex spot schedules (chained or successive) Refresh firmware through USB device
  • Load/export control settings from/to USB device
  • AC 60/50 Hz welding supported
  • Spot / Pulsation / Seam (quad heat) / Seam welding / Flash or Butt welding / Brazing
  • Multiple weld intervals plus pulsation, upslope and downslope
  • Air-over-oil gun operation
  • Retraction – maintained, and momentary
  • Water Saver (contactor timer)
  • Head lock function
EN6001 Retrofit Kit

EN7000 Constant Current AC Controls with Advanced Features

ENTRON Controls - EN7000 | Weld Systems Integrators

SINGLE PHASE AC Constant Current Control / Proportional Force Control for 50/60 Hz spot/ projection welding applications.


  • Modbus-TCP/IO (Ethernet)
  • Modbus-RTU (RS485)
  • RS232


  • Discrete I/O
  • Modbus-TCP/IP(Ethernet)
  • Modbus-RTU(RS-485)
  • Plus analog 0-10V


  • Pendant (RS232)
  • HMI RS485
  • HMI or PC Software Ethernet TCP/IP


  • Internal Data-logging up to 6000 records
  • Data can be recorded to hard drive through NetFlash
  • 16 Inputs/ 16 Outputs (short circuit protected )
  • Secondary or Primary Current Regulation
  • Analog Port for Proportional Valve for Weld Force Control
  • 2 Ethernet Ports ( Built In)
  • 1 RS232 Port (Built In)
  • 1 RS485 Port (Built In)
  • Electrode Manager ( Stepper Functions)
  • Minimum 2 Weld Intervals – Pre-heat + Weld
  • Ethernet Programming Access

MODEL 1, 3

  • Gear Plate Mount / Remote Mount
  • Pendant or NetFlash Programming

MODEL 2, 4

  • Touch Display or NetFlash Programming or Pendant
  • Door Mount / Cabinet mounting


WSP/3 Pendant

  • Easy, Intuitive 4 line display

NetFlash PC Software for Ethernet

  • Easy to use Networked PC. Access for : EN7000. Also: iPAK, and WS2003 via OPTIONAL W293201 adapter
  • PC Programming /Monitoring software
  • Live Data Logging RECORD function. w/timestamp
  • Backup and Restore Functions for program/data
  • Firmware Update Utility
iPAK Medium Frequency DC Inverter Controls
ENTRON Controls - IPAK - MFDC | Weld Systems Integrators

  • Current/Power Monitoring: High/Low limits and Pre-limit.
  • Proportional valve controller (0-10 V or 4-20 mA)
  • Pressure Monitoring: High/Low limits.
  • Up to 3 analog inputs (2 x 0-10 V, plus 1 x 0-10 V or 4-20 mA).
  • High Current Output configurations – up to 300 kA weld current capability, higher on special applications.
  • Spot / Repeat / Roll-spot / Seam (dual heat) / Seam (preheat)
  • Pulsation, Upslope and Downslope
  • Dual weld intervals per program (Preheat and Weld)
  • 64 programs (internal or external selection)
  • Constant Current regulation
  • Programmable blocking on fault
  • Weld Log keeps history of recent welds
  • Programmable outputs (events)
  • Retract/High-lift control
  • Single or dual gun operation
  • OHMA (Air over Oil) gun operation
  • Machine Sequencer Logic
  • Linked weld programs for multiple spot sequences
  • Constant Voltage regulation / Constant Power
  • Isolation Contactors
  • Fieldbus Interfaces – InterBus-S, Profibus DP and DeviceNet
  • Plug-in option board provides 10/100Base-T Ethernet connection
  • ELR/1 Earth-leakage Relay
  • ELCR/1 Machine Protection Device
  • I/O Expansion
  • WSP3 hand-held Programming Pendant
  • WS98-iPAK PC Programming Software – networking, calibration, monitoring, data logging
Smart Detection™ System
ENTRON Controls Smart Detection System | Weld Systems Integrators

Fully integrated “plug & play” weld control and pneumatic “smart” servo cylinder”

The Smart Detection™ system is a plug & play system that brings a range of features to the welding environment that

  • improves productivity,
  • reduces costs and
  • reduces operational risks

And, most importantly, it does this all at a cost level far below equivalent technologies that are purchased separately and that require time consuming and costly integration.


Electrodes come together under low force and will automatically retract if an obstruction is met prior to the programmed pinch gap.

Full welding force is not applied until contact with the work piece is sensed and in the pinch gap zone.

However if contact (secondary circuit closed) is sensed in the open position no movement occurs.

Contact is sensed via two independent means:

  1. Measurement of the force in the servo system.
  2. ENTRON’s electrical secondary contact detector unit (SCM2), hence providing dual redundant operation.


SD System’s servo and weld controller are linked by both discrete signals via Ethernet and via a modbus communication channel.

With risk reduction in mind, the system employs a dual-threaded architecture to drive these channels independently, and the status of this I/O can be viewed using the NetFlash programming software.

Correct correlation of the two is required before any motion can be initiated.


With previous systems, “low-force” was synonymous with “slow-speed” which negatively impacted productivity and encouraged the risk reduction option to be defeated.

The SD System’s low-force approach does not require this slow-speed compromise and can be easily set-up to achieve the best results for both risk reduction and production output.

Stack Up Height Confirmation, Obstruction Detection, Programmable Retract, Mid & Weld Positions:

  1. The SD system can be programmed and can detect changes from pre referenced weld positions.
  2. The measuring system can measure to one mil (0.001 inches).
  3. The measuring system can also be use to measure machine secondary deflection that occurs when weld force is applied.

Programmable Weld Force & Cylinder Speed:

SD System’s closed loop control ensures repeatable & constant weld force throughout the entire weld regardless of work piece deformation.

Detection of a Missing Component

The SD System uses the same intelligence to detect a missing component (such as a missing nut during projection welding) as it also does for obstruction detection and stack up height confirmation.

Intelligent Pneumatic Servo Valve

  • Controls all motion of the cylinder
  • Calibrated during its production, no further adjustment
  • Serviceable by end users

At the core of the SD System is an intelligent pneumatic servo valve which controls all motion of the cylinder.

This valve is calibrated during its production and never needs further adjustment.

If anything happens to the electrical or mechanical components of the servo valve, the end users’ maintenance staff can;

  • disconnect the four cables,
  • remove four cap heads,
  • remove the push fit air pipe
  • and change the defective servo valve and replace it with a new pre-calibrated valve, which are kept in stock and are readily available from Tuffaloy.

Optionally, the SD cylinder’s servo valve can also be equipped with a fail-safe valve which can be used to mechanically override the entire electrical system, forcing the electrodes apart when an unexpected dangerous condition is detected.

NetFlash Software

  • NetFlash™ is shipped with the iPAK SD control
  • Timer Firmware easily upgraded in the field

The SD System is programed using ENTRON’s proprietary NetFlash Windows based software.

NetFlash is provided along with the system at time of purchase and is easily upgraded in the field at end users’ facilities.

Once set-up the SD System can be operated using a traditional pendant but when connected to an PC, the programmability and end user experience are greatly enhanced during the operation of the welder.

Production and Cycle Time Reduction

Quick reference function allows you to change jobs in seconds.

The reference position for the weld position is taught in with the weld schedule, and can changed for a new job in less than 5 seconds.

Programmable retract/mid position

The retract position can be programmed to minimize the stroke distance required to reach the weld position. This is common to all weld schedules and reduces cycle time with no mechanical adjustments!

Headset mode

This allows the electrodes to come together under low force for the operator to adjust alignment in a single step (During this sequence the control will not weld). This means no need to make multiple adjustments to check Electrode alignment. Using the Headset function is a quick effective way to tip dress the electrodes engaged under low force. This helps ensure parallel weld faces.

System pre-weld checking

The SD system will not fire the weld current until the secondary contract signal is present with the electrodes in the correct working zone and programmed weld force is reached.

Weld Systems Integrators is your complete source for resistance welding equipment, consumables, parts and accessories with WORLDWIDE shipping. For more information, or to request a quote, please give us a call at 844-WSI-WELD or +1-216-475-5629.


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