Spindle Position Control (Spindle/C Axis Control); Outline; Switching Command - Mitsubishi Electric M800VW Series Programming Manual

M800V/M80V Series PLC Programming Manual (2/2)
13 Spindle Control

13.10 Spindle Position Control (Spindle/C Axis Control)

13.10 Spindle Position Control (Spindle/C Axis Control)

13.10.1 Outline

A spindle can be controlled as the rotary axis. After switching the spindle to the rotary axis, the positioning and the
interpolation between the spindle and other NC axes can be operated in the same way as the NC axis by executing the
position command (the movement command).
The NC axis for controlling the spindle as the rotary axis or the machinery for switching the spindle and NC axis (such as a
gear switching machinery) had been necessary for controlling a spindle readily as the rotary axis, but they are not necessary
with this function.
There are two method for switching a spindle and a rotary axis: PLC signal method and program command method. The
method can be selected with the parameter.
This chapter describes the PLC signal method.
To enable the method, set "#3129 cax_spec/bit0" (Spindle position control selection method) to "0".

13.10.2 Switching Command

The spindle mode and the C axis mode can be switched with the "Servo OFF" signal (*SVFn) ON/OF with PLC ladder.
The interpolation operation is enabled by executing the movement command to the C axis in the C axis mode same as NC
axis.
 Switching spindle mode to C axis mode
Change the "Servo OFF" signal (*SVFn) OFF to ON.
 Switching C axis mode to spindle mode
Change the "Servo OFF" signal (*SVFn) ON to OFF.
Note
(1) The spindle does not operate when switching from C-axis mode to spindle mode while the "Spindle forward run start" sig-
nal (SRN) and "Spindle reverse run start" signal (SRI) are on. The "Spindle forward run start" signal (SRN) and "Spindle
reverse run start" signal (SRI) must be input again.
(2) Turn the "Servo OFF" signal (*SVFn) OFF after confirming that the C axis has stopped. If the signal is turned OFF while
moving, the operation error (M01 0005) is generated.
(3) The state of mode changes is confirmed with the servo ready signal for the spinning axis.
Spindle mode
Servo OFF signal
(*SVFn)
Servo ready
completion signal
(RDYn)
Program example ("S1" for the spindle and "C" for the NC axis are configured)
Program Example Mode
M03 S1000 Spindle
:
:
C axis
M14
G01X10.C20.F100
:
Spindle
M15
M04 S1500
:
C axis mode
Command of 1000 r/min with S1 spindle set to forward operation (M03)
:
:
Change from the spindle mode to the C-axis mode by turning ON the C-axis servo OFF
signal (M14).
During C-axis mode, the S1 axis functions as an NC axis (C axis) command. Interpola-
tion operation with other NC axes is possible.
:
Change from the C-axis mode to the spindle mode by turning OFF the C-axis servo OFF
signal (M15).
Command of 1500 r/min with S1 spindle set to reverse operation (M04)
:
523
Spindle mode
Servo ON
Servo OFF
Ready ON
Ready OFF
Explanation
IB-1501668-B