Notes - YASKAWA YRC1000 Operator's Manual

1.13.8.5 Notes

1 Spot Welding Application Using a Motor Gun
1.13 Other Functions Using a Motor Gun
1. It is recommended that the "TH" tag of SVSPOT/SVSPOTMOV
instruction be set just before thickness measurement after teaching
operation.
If the "TH" tag is specified before that, the alarm "Thickness Error" may
occur during test operation, which results in less operating efficiency.
2. The value of detected workpiece thickness is affected by the delay of
detection timing and gun arm bend at the touch motion. Therefore, an
absolute accuracy cannot be guaranteed.
The faster the touch speed becomes and the more the touch pressure
increases, the bigger the error will be. If the pressure specified in the
thickness measure mode is equal to that in the monitoring mode, the
absolute accuracy will be approximately 1 mm or less.
3. The detected workpiece thickness is calculated by converting the
pulse data at touch detection to the stroke according to the pulse-to-
stroke conversion table registered in the Gun Condition file.
Therefore, the detected workpiece thickness is affected by the
accuracy of the pulse-to-stroke conversion data.
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