Weldtouch Secondary Constant Current AC Welding  Controls and Contactors

Using Secondary Constant Current to gain control of your resistance welding process can result in less down time, reduced scrap, and higher production efficiencies.

• Standard features include a built in weld monitor, conduction degree monitor, and error monitor for simultaneous viewing of both programmed and actual weld data.
• Standard functions include two stage initiation, pulsation, up and down slope, forge delay, and preheat/post heat.
• Increased flexibility with 15 weld schedules, 2 valve output signals, 9 steppers, and self diagnostics.
• Direct programming of the actual weld current
• AC weld controls and contactors with flexible options.

The following graphs show the difference a Constant Current Control can make:
 

Trend Lines -- CY-210B & CT-110B

This is what your primary line voltage does when presented with a load.
See the corresponding drop in secondary weld current.
Now see how the constant current control keeps the secondary current from dropping off.

Constant Current Feedback Theory
Using a toroidal coil, the current wave form is reconstructed from the output signal. It is then transformed into an RMS effective value using the following formula:

The control then compares this effective value with the set current value. The weld current is corrected with every half cycle through phase conversion and trigger pulse oscillation. The result is smooth, consistent secondary welding current delivered at the weld regardless of the line voltage fluctuations.

1. Schedule number: Up to 15 schedules can be stored in memory for instant recall.
2. Three impulse weld time: Provides weld time flexibility for a wide variety of welding applications.
3. Weld Current: Weld 1, 2, 3 can be set and displayed.
4. Current and Conduction degree monitor: Sets the High and Low current limit (1-->99%) and monitors current fluctuation and conduction degrees.
5. Valve and Mode Select: Step-up / Counters / Turn Ratio, +/-% Current Window
6. Caution and Error Indicators: No current, Overtemp, SCR Short, Current Limit, No weld, and Step End.
7. Emergency Stop
8. Reset
 
 
 

CY-210B Constant Current Weld Control (below)

SC-210 Contactor (below)

 

	SC-210	SC-210CB
SCR Options	300A Air Cooled 1200A Water Cooled 1700A Water Cooled 3200A Water Cooled
Circuit Breaker Options	N/A	225A 400A
Operator Control Options	Emergency Stop Key Switch / Program Lock Control Power On / Off Main Power Indicator Retraction Valve 115V or 24V Primary Current Sensor
Dimensions: (includes 1" (25.4 mm)  clearance for push buttons)	24 x 20 x 10 in (610 x 508 x 254 mm)	30 x 36 x 12 in (762 x 914 x 305 mm)

 

Specifications

Model	CY-210B	CT-110B
Control Power Weld Power	120 VAC, +/- 20%, 50/60 Hz. 220 VAC / 440 VAC +10%, -25%, 50/60Hz autoselect
Weld Current Control Systems:	Secondary Feedback Primary Feedback Primary Voltage Compensation
Control Speed:	Secondary Constant Current: 1/2 Cycle Primary Constant Current: 1/2 Cycle Primary Voltage: 1 Cycle
Current Range:	1 kA to 80 kA (Maximum: 5 kA to 80 kA)
Timer Settings:    Squeeze    Preheat    Cool 1    Upslope    Weld 1    Cool 2    Weld 2    Down Slope    Hold    Off    Pulsation	15 Schedules 00-99 cycles 0-9 cycles 0-9 cycles 0-9 cycles 00-99 cycles 00-99 cycles 00-99 cycles 00-99 cycles 00-99 cycles 00-99 cycles 1-9 times	15 Schedules 00-99 cycles 00-99 cycles 00-99 cycles 00-99 cycles 00-99 cycles 00-99 cycles 00-99 cycles 00-99 cycles 00-99 cycles 00-99 cycles 1-9 times
Valve Outputs:	2 schedules Output is 100 VAC, max 1 amp or 24 VDC by Triac control	1 schedule Output is 100 VAC, max 1 amp or 24 VDC by Triac control
Current Steppers:	2 schedules 9 step counter -- 0-9,999 Step Up rate: -50 to 99%  (1% increments)	1 schedule 9 step counter -- 0-9,999 Step Up rate: -50 to 99%  (1% increments)
Current Monitor:	15 schedules High Limit: 1 to 49% Low Limit: -1 to -49% Set at 0 for no monitoring
Conduction Degree Monitor:	1 to 180 degrees, 15 schedules Set at 0 for no monitoring
Fault List:	A) Over Temp B) SCR short C) No current or Toroidal coil error D) No Weld E) Self Diagnostic Error F) Start input Error (parity check error)
Dimensions: H x W x D	14 x 4.7 x 9.8 in (356 x 119 x 249 mm)	4.8 x 14 x 9.8 in (112 x 356 x 249 mm)
Weight:	9.9 lbs (4.5 kg)
Toroidal Coil:	MB-400L (I.D.: 5")

For more information, or help selecting or pricing a controls system, feel free to contact T. J. Snow. You might also be interested in:

• Miyachi's AC Resistance Welding Controls
• DC Inverter Power Supplies
• Adding a Weld Checker to your system
• Need Resistance Welding Supplies?

Weld Checker Chart | Other Miyachi Products and Accessories
Welding Supplies | Return to T. J. Snow

Contact Information:	120 Nowlin Ln P. O. Box 22847 Chattanooga, TN 37422	(423) 894-6234 1-800-NOW-SNOW FAX (423) 892-3889 ORDER FAX (423) 490-2417
	welders@tjsnow.com