www.dadehpardazan.ir 88594014-155.5 Polarity Detection5-155 Trial Operation (Checking Linear Servomotor Operation)5.5 Polarity DetectionWhen using a linear servomotor without hall sensor, execute the polarity detection.Make sure that the following conditions are satisfied when executing the polaritydetection.• There will be no danger around the linear servomotor when the linear servomo-tor moves approximately 10 mm.(The linear servomotor may move approximately 5 cm in the case the polaritydetection fails. The distance the linear servomotor moves in such case may differdepending on many factors.)• The scale pitch is within 100 m. (within 40 m is recommended when using anincremental linear scale.)• Minimum unequal external force on the linear servomotor (5% of the rated forcemaximum is recommended.)• The mass ratio is 50 times greater or less.• On a horizontal axis.• Friction on the guide is a few percentages of the rated force (air slide not used).1. The linear servomotor is turned ON during polarity detection, sotake measures to avoid electric shock. The linear servomotor willmake large movements during detection, so take the machine’srange of motion into consideration and do not stand near the anymoving parts.2. Polarity detection depends on many factors, such as mass ratio,friction, and cable tension. If any error occurs because of one ofthese factors, polarity detection may failed.Polarity detection→Status display: P-dtPolarity detection completed→Normal operation possible/S-ON input(/P-DET)/S-RDY output
