Mitsubishi Electric M800VW Series Programming Manual page 541

M800V/M80V Series PLC Programming Manual (2/2)
13 Spindle Control
13.9 Multiple-Spindle Control II
Spindle rotation speed control
There are two methods for spindle rotation speed control. Which to use can be selected by the parameter "#1300 ext36/bit1"
(Spindle control for each part system).
 Common to part systems (Parameter #1300 ext36/bit1 = 0)
The spindle function (S) command which was last issued to each spindle is valid.
The spindle function (S) command issued in each part system becomes valid when the spindle to control is selected.
 Individual for each part system (Parameter #1300 ext36/bit1 = 1)
The spindle function (S) command which was last issued in the part system where each spindle is selected is valid.
Even when the part system selected for the spindle is switched, the current rotation speed is held until new spindle function
(S) command is given.
Shown below is a timing chart of the 1st spindle command rotation speed when the spindle is used in two different part
systems.
M3 command selects the 1st spindle and runs it forward.
Machining program
1st part system
S100
2nd part system
1st spindle command rotation speed
Common to part systems (Parameter #1300 ext36/bit1 = 0)
100
(r/min)
50
(r/min)
0
(r/min)
Individual for each part system (Parameter #1300 ext36/bit1 = 1)
100
(r/min)
50
(r/min)
0
(r/min)
(1) M3 command given in the 1st part system rotates the 1st spindle at 100r/min.
(2) M3 command given in the 2nd part system switches the part system selected for the 1st spindle to the 2nd part system.
When spindle control is common to part systems, the current rotation speed (100r/min) is retained even though the
selected part system is switched.
When spindle control is individual for each part system, the rotation speed of the 1st spindle becomes 50r/min, a speed of
the spindle function (S) command issued last in the 2nd part system, at the timing of part system switching.
(3) The spindle function (S) command given in the 2nd part system changes the rotation speed of the selected spindle (1st
spindle) to 80r/min.
(4) M3 command given in the 1st part system switches the part system selected for the 1st spindle to the 1st part system.
When spindle control is common to part systems, the current rotation speed (80r/min) is retained even though the
selected part system is switched.
When spindle control is individual for each part system, the rotation speed of the 1st spindle becomes 100r/min, a speed
of the spindle function (S) command issued last in the 1st part system, at the timing of part system switching.
The following spindle commands are processed individually for each part system while the part system-based spindle control
is enabled:
 Spindle function (S) command
 Constant surface speed control (G96)
 Spindle speed clamp (G92)
IB-1501668-B
(1)
M3
・・・
S50
(2)
・・・
M3 S80
520
(3) (4)
M3
・・・