How To Apply Tool Axis Rotation Angle Compensation Amount (G174) - Mitsubishi Electric M800VW Series Programming Manual

M800V/M80V Series PLC Programming Manual (2/2)
14 PLC Help Function
14.26 Simple Inclined Surface Machining Command

14.26.2 How to Apply Tool Axis Rotation Angle Compensation Amount (G174)

If you want to perform simple tool center point control (G174) or tool axis direction control (G53.1) using a tool that is not
parallel to Z (-) of the machine coordinate system while the tool axis rotation angle is at 0 degree, the simple tool center point
control (G174) or tool axis direction control (G53.1) can be implemented by specifying the tool axis rotation angle
compensation amount (offset angle).
This is effective, for instance, when you use any tool mounted on a turret for machining.
There are two types of methods to apply the tool axis rotation angle compensation amount as below. Use the parameter
"#1450 5axis_Spec/bit1" (Using G174 tool axis rotation angle as compensation amount) to select the method.
Offset angle designation method ("#1450 5axis_Spec/bit1" is "0")
There are two offset angle designation methods: program command method and PLC signal method.
 The program command method can be designated using the R address of the simple tool center point control (G174) or
tool axis direction control (G53.1).
 The PLC signal method can be designated using the R register (TANGOFS :R2634 to R2635).
The offset angle can be designated using the total value of the angle specified in the program command method and that
specified in the PLC signal method when the simple tool center point control (G174) or tool axis direction control (G53.1) is
commanded.
The offset angle must be designated using the status in which the tool axis rotation angle is at 0 degree, as the standard.
Note that the offset angle varies depending on the tool rotary axis's rotation direction (*1).
When you use a tool of which the center point is in the X axis "-" direction of the machine coordinate system, the offset angle
is set as follows:
 When the tool rotary axis's rotation direction is set to CW (#7933 DIR_T2 = 0), the offset angle is set to 270 degrees. (Refer
to (A) in the following figure.)
 When the tool rotary axis's rotation direction is set to CCW (#7933 DIR_T2 = 1), the offset angle is set to 90 degrees. (Refer
to (B) in the following figure.)
(*1) The rotation direction setting depends on the MTB specifications (parameter "#7933 DIR_T2").
729 IB-1501668-B