NOTE: This weld checker is now obsolete and has been replaced by the MM-370A weld checker. Compare weld checkers available from T. J. Snow.
Using Secondary Constant Current to gain control of your resistance welding process can result in less down time, reduced scrap, and higher production efficiencies.
Miyachi’s Weltouch(tm) AC weld controls with secondary constant current feedback examine each half cycle of the actual weld current flow and compensate for the changes in secondary current during welding. Standard built-in current and conduction degree monitors allow for simultaneous viewing of both programmed and actual weld conditions. Miyachi’s secondary constant current feedback combined with our built-in weld monitors can provide a higher degree of accuracy, confidence, and control in AC resistance welding. The Weldtouch SC-210 and CY-110B offer a variety of SCR sizes and optional contactor accessories. The Weldtouch CY-210b and CT-110B are easily adaptable to most existing contractor cabinets.
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.
SC-210 | SC-210CB | |
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SCR Options | 300A Air Cooled 1200A Water Cooled 1700A Water Cooled 3200A Water Cooled |
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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 |
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Dimensions: (includes 1" (25.4 mm) clearance for push buttons) | 24 x 20 x 10 in (610 x 508 x 254 mm) | 330 x 36 x 12 in (762 x 914 x 305 mm) |
Model | CY-210B | CT-110B |
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Control Power Weld Power | 120 VAC, +/- 20%, 50/60 Hz. 220 VAC / 440 VAC +10%, -25%, 50/60Hz autoselect |
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Weld Current Control Systems: | Secondary Feedback Primary Feedback Primary Voltage Compensation |
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Control Speed: | Secondary Constant Current: 1/2 Cycle Primary Constant Current: 1/2 Cycle Primary Voltage: 1 Cycle |
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Current Range: | 1 kA to 80 kA (Maximum: 5 kA to 80 kA) | |
Timer Settings: | 15 Schedules | 15 Schedules |
Squeeze | 00-99 cycles | 00-99 cycles |
Preheat | 0-9 cycles | 00-99 cycles |
Cool 1 | 0-9 cycles | 00-99 cycles |
Upslope | 0-9 cycles | 00-99 cycles |
Weld 1 | 00-99 cycles | 00-99 cycles |
Cool 2 | 00-99 cycles | 00-99 cycles |
Weld 2 | 00-99 cycles | 00-99 cycles |
Down Slope | 00-99 cycles | 00-99 cycles |
Hold | 00-99 cycles | 00-99 cycles |
Off | 00-99 cycles | 00-99 cycles |
Pulsation | 1-9 times | 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 |
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Conduction Degree Monitor: | 1 to 180 degrees, 15 schedules Set at 0 for no monitoring |
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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) |
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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.