Precautions - Mitsubishi Electric M800VW Series Programming Manual

M800V/M80V Series PLC Programming Manual (2/2)
14 PLC Help Function
14.2 Manual Speed Command

14.2.3 Precautions

(1) The execution of the manual speed command ignores the cycle start.
(2) If the asynchronous tapping is executed while the manual speed command is valid, the pitch will not be the same as com-
manded.
(3) The reverse run cannot be executed in the following operations:
 Dog-type reference position return
 In cutting cycle in the synchronous or asynchronous tap
 In shift amount operation in a fixed cycle
 In tool center point control
 In normal line control
 In milling interpolation/pole coordinate interpolation/cylindrical interpolation
 Thread cutting (G33) .
 Exponential interpolation.
 Spline interpolation
 NURBS interpolation
 Tool change position return or 2nd/3rd/4th reference position return (from the intermediate point to the block end).
 Reference position return (G28, G29).
When G28 is commanded, however, the reverse run is available from the start point and to the intermediate point.
When G29 is commanded, the reverse run is available from the intermediate point to the end point.
(4) If a forward run has been executed at rapid traverse (G0) with non-interpolation, the reverse run may not have the same
path.
Y
Reverse-run path
G0 start point
(5) During the creep distance movement in the unidirectional positioning (G60), a reverse run ends at the creep distance
movement start point.
Start point
Creep distance movement
start point
G0 end point
Reverse run start point
Forward-run path
Positioning position
Final advance direction
End point
G60 Creep distance
(Range of the reverse run
during the creep distance movement)
575
X
IB-1501668-B