Mitsubishi Electric MELDAS C6 Instruction Manual page 377

(3) The servo amplifier recognizes the first
(2) Execution procedure
The execution procedure for dog-type reference point return is shown below.
(1) Initial setting
(2) Set the speed
(3) Designate the
reference
point return
direction
(4) Select the
reference
point mode
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5. Zero Point Initialization for Auxiliary Axis
5.1 Dog-type Reference Point Return for Auxiliary Axis
grid point after the dog signal turns ON
as the electrical zero point.
Confirm that the parameter "#101 Cont1 bit D (No zero point)" setting is to 0 (zero).
< Memo > When "#101 Cont1 bit D (No zero point)" is 1, the specification will be that
there is no reference point. The machine position when the power is turned
ON becomes the reference point.
Set the parameters that designate the axis feedrate during reference point return "#110
ZRNspeed (Reference point return speed)" and "#111 ZRNcreep (Reference point return
creep speed)".
< Memo > If the reference point return speed is too fast, it may not be able to decelerate
fully when the limit switch is ON, and an alarm may occur. If this alarm
occurs, decrease the reference point return speed.
Determine the motor rotation direction for reference point return execution with parameter
"#101 Cont1 bit8 (Reference point return direction)".
#101 Cont1 bit8
Reference point return direction
When the "reference point return mode (ZRN)" signal is turned ON, and the start signal is
turned ON, reference point return will be executed.
The axis automatically stops at the electrical zero point.
< Memo > The default settings of electrical zero point, reference point, and coordinate
zero point are the same. Refer to the next section when setting the reference
point and coordinate zero point to a different position than the electrical zero
point.
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∆ ∆
Machine feedrate
ZRNspeed Reference point return speed
ZRNcreep Reference point return creep speed
Near-point
dog
∆ ∆ ∆
Electrical zero point
0
1
III - 28
Stop
∆ ∆
▲
Electrical zero point
∆ ←
▲
Grid
Approach direction
Motor rotates CW and approaches
Motor rotates CCW and approaches