Cam/Ball Screw Switching Function - Mitsubishi Electric Q172CPU Programming Manual

10 AUXILIARY AND APPLIED FUNCTIONS

10.2 Cam/Ball Screw Switching Function

Cam/ball screw switching
command (M5488+n) : OFF
Cam/ball screw switching
command (M5488+n) : ON
Refer to Section 1.3.4 of the "Q173CPU(N)/Q172CPU(N) Motion controller
(SV13/SV22) Programming Manual (Motion SFC)" for the correspondence software
version.
When a cam is set as output module in the mechanical system program, a cam
executes the same operation as ball screw by turning the cam/ball screw switching
command (M5488+n) on corresponding to each output axis No..
(1) Operation of output axis by cam/ball screw switching command
Items
Specified cam pattern operation
Same operation as ball screw
Command to servo amplifier = Preset command to servo amplifier +
(Note): Feed current value is calculated based on the travel value per pulse set
(2) Cautions at cam/ball screw switching
The current value within 1 cam shaft revolution is calculated based on the feed
current value, lower stroke limit value, stroke amount and cam No. (cam pattern)
by turning off the cam/ball screw switching command.
It is invalid to turn on the cam/ball screw switching command to axis that except
cam axis.
If the cam/ball screw switching command (M5488+n) is turned off outside the
range of "lower stroke limit value to stroke amount" for cam a minor error (error
code: 5000)will occur.
(3) Cam operation re-start procedure on servo error
"Continue Virtual Mode" is set for operation on servo error, if the feed current
value of output axis is outside the range of cam operation ("Lower stroke limit
value to Stroke amount") by servo error for two-way cam, return the output axis to
within cam operation range.
a) Remove servo error cause.
b) Turn the cam/ball screw switching command (M5488+n) ON.
c) Execute the servo error reset (M3208+20n).
d) Return the output axis position within cam operation range to within stroke
range by JOG operation, etc.
e) Turn the cam/ball screw switching command (M5488+n) OFF.
f) Re-start virtual mode.
Operation details
in the fixed parameter.
10 - 7
Drive module travel value[PLS] Gear ratio