6 POSITIONING CONTROL

6.23.8 Home position return by the data set type 2

(1) Data set type 2

The proximity dog is not used in this method for the absolute position system.

(2) Home position return by the data set type 2

Home position is the real position of servomotor at the home position return operation.

Machine travel range

Real position of

Command position

machine at the home

at the home position

position return start

return start

Home position is the real position at the

Home position returnhome position return by servo program

start instruction

Fig. 6.39 Home position return operation by the date set type 2

(3) Home position return execution

Home position return by the data set type 2 is executed using the servo program in Section 6.23.16.

(4)Cautions

(a)A zero point must be passed (zero pass signal: M2406+20n ON) between turning on the power supply and executing home position return.

If home position return is executed without passing a zero point once, "no zero point passed error" occurs. If "no zero point passed error" occurred, perform the home position return again, after reset the error and turn the servomotor at least one revolution by the JOG operation.

The zero point passing can be confirmed with the zero pass signal (M2406+20n). However, when "1 : Not need to pass motor Z phase after the power supply is switched on" is selected in the "function selection C-4" of servo parameter (expansion setting parameter), even if it does not pass zero point at the servo amplifier power ON, the home position return is possible because the zero pass signal (M2406+20n) turns ON.

(b)The home position return data required for the data set type 2 are the home position return direction and home position address.

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