Mitsubishi Electric MR-J4-TM Instruction Manual page 470

Servo amplifier melservo-j4

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14. USING A LINEAR SERVO MOTOR

The following shows the relation between the stop interval at the home position return and the linear

encoder resolution. For example, when the linear encoder resolution is 0.001 μm and the parameter

for the stop interval at the home position return, [Pr.PL01], is set to "_ 5 _ _" (16777216 pulses), the

stop interval is 16.777 mm. The value inside a bold box indicates the recommended stop interval for

each linear encoder resolution.

Linear encoder

resolution [µm]

Stop interval

In the case of a dog type home position return, after the proximity dog signal rear end is detected,

the nearest home position reference position shifted by the home position shift distance is used as

the home position.

Set one linear encoder home position in the full stroke, and set it in the proximity dog signal

detection position.

When two or more reference marks exist during the full stroke of the linear encoder, select "Enabled

(_ _ 1 _)" of "Linear scale multipoint Z-phase input function selection" in [Pr. PC17].

Linear servo motor

Proximity dog

Reference home

Linear servo motor

Note 1. Changeable with [Pr. PL01].

Home position return speed

Linear encoder home position

2. Home position shift distance can be changed with [Pr. PT07] and [Pr. PT69].

6710.886 13421.773 33554.432 67108.864 134217.728

Home position return direction

1048576 pulses (Note 1)

1048576 pulses × n + Home position shift distance

Home position shift distance

Home position