Absolute Position Zero Point Initial Setting: Marked Point Alignment Method; Test Operation In Auxiliary Axis Test Screen - Mitsubishi Electric M800VW Series Programming Manual

M800V/M80V Series PLC Programming Manual (2/2)
14 PLC Help Function
14.34 PLC Axis Indexing

14.34.3.7 Absolute Position Zero Point Initial Setting: Marked Point Alignment Method

This method determines the absolute position basic point by aligning the axis to the marked point on the machine.
 Selecting the marked point alignment method
Set "2" to "#2049 type (Absolute position detection method)" and turn ON the power again.
 Initial setting
Set "#2050 absdir (Basic point of Z direction)" with the direction of the grid point, which is an electrical zero point, from the
marked point alignment position.
Marked point alignment position
Electrical zero point
when "absdir" is set to "1"
(-) direction
 Operation and performance
(1) Turn ON the following signals to enable the absolute position reference position basic point initialization set mode.
Abbreviation Signal name
AZS Zero point
initialization mode
(2) Move the axis to the desired "absolute position basic point" in jog handle or incremental feed.
(3) Turn ON the Reference point setting (ZST) signal.
(4) Using jog, handle or incremental feed, move the axis in the direction of the grid to be an electrical zero point. When the
axis will automatically stop at the grid to be an electrical zero point, then the absolute position coordinates will be estab-
lished.
When "#2059 zerbas (Select zero point parameter and basic point)"is set to "1", the "absolute position basic point" will be
set to the electrical zero point (grid) instead of the Reference point setting position.
(5) In this state, the absolute position basic point will be the coordinate zero point.
To set the absolute position coordinate zero point to a position other than the one where Reference point setting (ZST)is
ON or the electrical zero point, move the machine coordinate zero point with "#2 Zero-P".
[Reference point setting method]
Axis movement
Distance set in "#2 Zero-P"
When "#2059 zerbas" = "1"
When "#2059 zerbas" = "0"
Machine coordinate
zero point

14.34.4 Test Operation in Auxiliary Axis Test Screen

The absolute position setting and test operations can be carried out by separating the axis control from PLC using the
auxiliary axis test screen. As for the operation details, refer to Instruction Manual.
Electrical zero point
when "absdir" is set to "0"
(+) direction
The absolute position basic point initialization mode will be entered.
This mode will be kept until the NC is turned OFF.
Marked point alignment position
(2)
(4)
Electrical
Grid
zero point
Explanations
855 IB-1501668-B