Absolute Position Detection For Auxiliary Axis; Dog-Type Reference Point Return Method; Machine Stopper Method - Mitsubishi Electric MELDAS C6 Instruction Manual

5.2 Absolute Position Detection for Auxiliary Axis

5.2.1 Dog-type Reference Point Return Method

The coordinate zero point is established with the dog-type reference point return operation. The
operation method is the same as the dog-type reference point return using the incremental system.
Refer to the section "5.1 Dog-type Reference Point Return for Auxiliary Axis".

5.2.2 Machine Stopper Method

Jog feed is carried out with the torque (current) limit set, and the axis is pushed against the machine
end, etc., to determine the absolute position origin point.
(1) Initialization
The operation parameter group 4 will be automatically selected during the reference point
initialization mode. Set the torque limit value (TL4) and excessive error detection width (OD4) to
values appropriate for the pushing operation.
1. Select the Auxiliary axis monitor screen.
2. Press the page key to select the axis to be set
3. Press
4. Press
5. Press
6. Press
7. Move the axis to set the marked point.
8. After initializing, turn on the power again to run
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5. Zero Point Initialization for Auxiliary Axis
5.2 Absolute Position Detection for Auxiliary Axis
Operation procedure
and set the axis name.
to turn ON the "Ope test mode"
J
signal.
.
Z
. When the "Ope test mode" is
M
INCREMENTAL or HANDLE, move the cursor to
"Scale" and set the feedrate per pulse.
.
P
(Press or to start.)
(1) The axis is pushed against the machine end stopper
with jog or handle feed. When the torque (current)
reaches the limit value due to this pushing, the
limiting torque (TLQ) is output, and the position is
saved as the "absolute position origin point".
(2) The axis is moved in the direction opposite the
pushing direction. When the axis moves and
reaches the first grid point, the axis automatically
stops, and the absolute position coordinates are
established.
If parameter "101 Cont1 bit A" is set to "1", the
electrical zero point (grid) will be set as the "absolute
position origin point" instead of the pushed position.
(3) In this state, the absolute position origin point will become the coordinate zero point. To set a point
other than the push position or electrical zero point as the absolute position coordinate zero point,
move the machine coordinate zero point with parameter #116 ABS Base (Absolute position zero
point).
the normal operation.
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If the axis that has not been set is selected, error
will occur.
"Ope test mode" signal can be turned ON only
when the auxiliary axis is stopped and "Ope test
mode valid" signal from PLC is turned ON.
The absolute position initializing state is on.
Operation mode can be selected from the followings:
JOG, INCREMENTAL, HANDLE
Speed and torque limit value can be designated.
#101 Cont1 bit A = 1
#101 Cont1 bit A = 0
∆ ∆
Machine coordinate
zero point
III - 30
State
Axis stopper
position
Axis movement
(1)
(2)
Setting distance in
#116 ABS Base
∆
← Grid
Electrical
zero point