Workpiece Coordinate System Shift; Operation Method - Mitsubishi Electric M800VW Series Programming Manual

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

14.6 Workpiece Coordinate System Shift

14.6 Workpiece Coordinate System Shift
Carry out the automatic setting for the workpiece coordinate system shift amount using the "Workpiece measurement" signal.

14.6.1 Operation Method

(1) Carry out the reference position return. If the workpiece is measured without establishing the reference position return,
the operation message "Meas axis not returned to ref. position" appears. However, when the setup workpiece coordinate
system shift screen is not displayed, the message will not appear.
After the power is turned ON, carry out the dog-type reference position to establish the coordinate system. In the absolute
position detection specification, configure the initial setting in advance if the absolute position is not established.
(2) Set the mode selection switch to the manual mode (handle, jog, rapid traverse, or step).
(3) Set the "Tool length measurement" signal (YC21) to "1". "On mea" is displayed on the setup workpiece coordinate system
shift screen.
(4) Select whether to measure the workpiece coordinate system shift amount on the main spindle side or sub-spindle side by
using the "Tool presetter sub-side valid" signal (YCDA).
Hold the status of this signal until the workpiece coordinate system shift amount measurement with the selected tool is
completed.
(5) Issue the T command by MDI operation, etc., then select tool.
Set the selected tool compensation No. in R register. The R register to be set differs according to parameter setting and
the state of the "Tool presetter sub-side valid" signal. Set the tool length data and wear data for the tool being used
beforehand.
(6) If the workpiece end face does not need to be cut, carry out positioning to the measurement position.
If the workpiece end face has not been cut, cut the workpiece end face slightly to even it. Do not move the tool in the Z
axis direction after cutting the workpiece end face.
(7) Input the "Workpiece measurement" signal (Y9E1). The Z axis external workpiece coordinate offset data is automatically
calculated from the tool compensation data of the used tool and the machine value at the point this signal is input. The
results are set as the data.
<Details on automatic calculation expression>
The workpiece coordinate system shift amount is automatically calculated with the following expression:
When the parameter "#8709 Ext work sign rvs" is set to "0".
Workpiece coordinate system shift amount = Machine coordinate value - Tool com-
pensation data
When the parameter "#8709 Ext work sign rvs" is set to "1"
Workpiece coordinate system shift amount = - (Machine coordinate value - Tool com-
pensation data) * (-1)
Select the tool compensation data used for the measurement with the parameter "#1226 aux10/bit0".
#1226 aux10/bit0
0
1
<Compensation No. of selected tool>
The compensation number of the tool length and nose wear data used for automatic calculation is determined by the PLC
ladder.
IB-1501668-B
Tool compensation data
Tool length data + nose wear data
Tool length dat
592