Instruction manual

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5. OPERATION AND FUNCTIONS
5.2.6 Magnetic pole detection under the specified condition
(1) Magnetic pole detection by the current detection 1
This method is used when the travel at the magnetic pole detection is expected to be smaller than the
magnetic pole detection (initial value) of the positioning detection method. The use of this method is limited
to when the load mass ratio (control gain) of equipment is clearly known.
(a) Procedures of magnetic pole detection by the current detection 1
1) If the control gains (Parameter Nos. PB06, PB07, PB08, PB09 and PB10) are known, set them in
advance. If they are not known, adjust the control gains using the following method a. or b.
a. Move the linear servo motor and execute the auto tuning (or normal gain adjustment), after the
magnetic pole detection of the positioning detection method.
b. Set the auto tuning to the manual mode 2 (Parameter No. PA08:
2), set the response level to
12 (Parameter No. PA09: Initial value), and then apply the value calculated from the machine
configuration to the load mass ratio (Parameter No. 06) against the linear servo motor primary side.
2) If the initial magnetic pole detection error (27) occurs at the magnetic pole detection, the following
conditions may be considered as causes. Check the setting values.
The setting value of the parameter No. PS09 (Magnetic pole detection voltage level) is too small.
The parameter No. PC PS27 (Encoder pulse count polarity) is not set correctly.
The parameter Nos. PS02 and PS 03 (Linear encoder resolution setting) are not set correctly.
3) If the overcurrent alarm occurs during the magnetic pole detection, make the magnetic pole detection
voltage level (Parameter No. PS09) smaller five by five. If the overload 1 (59) and overload 2 (51)
occur, make the current detection method oscillation setting (Parameter No. PS11) smaller 10 by 10.
4) If the machine resonates during the magnetic pole detection, lower the response level (Parameter
No. PA09) of the auto tuning or use the machine resonance filter (Parameter Nos. PB13 and PB15).