
B–63505EN/02
7.TROUBLESHOOTING
249
CNC is reading an axis command (X,Y,Z,...) in a program and giving the
command to the axis.
CNC is reading a dwell command (G04) in a program and is executing
the dwell command.
Positioning (G00) to a specified position of a specified axis is not
completed.
Whether positioning is completed or not is checked as the servo position
error amount. Check it CNC’s diagnostic function as follows:
DGN no.300
Position Error
> PARAM 1826
In–position width
Position error amount almost becomes 0, when positioning of an axis
completes and when the amount becomes within the in–posiiton width,
it is assumed that positioning completes and the next block is exected.
If position error amount does not become within the in–position width,
refer to servo alarm 400, 4n0 and 4n1.
Actual feedrate is overridden by the override signals to a programmed
feedrate. Check the override signals using the PMC’s diagnostic function
(PMCDGN).
<Normal override signal>
#7
*FV7G0012
#6
*FV6
#5
*FV5
#4
*FV4
#3
*FV3
#2
*FV2
#1
*FV1
#0
*FV0
*FVn :Feedrate override
<State of override signal>
*FV7@@@@@@@*FV0
11111111
11111110
:
10011011
:
00000001
00000000
0%
1%
:
100%
:
254%
0%
<T series>
Start lock signal is input
#7
G0007
#6 #5 #4 #3 #2 #1
STLK
#0
#1 (STLK) With this signal being 1, start lock signal is input.
<Common to T series and M series>
There are a plural number of interlock functions. Parameters are set by
machine tool builders for which interlock function is used.
Therefore, confirm the following parameters at first:
#7
3003
#6 #5 #4 #3
DIT
#2
ITX
#1 #0
ITL
#0 (ITL) 0 : Interlock signal(*IT) is valid.
#2 (ITX) 0 : Interlock signal (*ITn) is valid.
#3 (DIT) 0 : Interlock signal (± MITn) is valid.
Confirm which interlock signal is activated by the PMC’s diagnostic
function (PMCDGN) .
b.Travel command is being
executed
c. A dwell command is
being executed
d.In–position check
(confirming positioning)
is being done
e. Feedrate override is at
0%
f. Interlock signal or start
lock signal is input