Disclaimer: CNC Concepts, Inc. accepts no responsibility for the use
or misuse of techniques shown in this web page. We simply publish information
we feel will be of interest to CNC users. In all cases, the reader is totally
responsible for considering the implications, good and bad, of implementing one
or more of the techniques we show.
How do you switch from OD to ID chucking on a turning center?
How would you go about programming I.D. chucking on a Fortune V-turn 26 with
Fanuc 18 since there is not a physical switch to change from O.D. chucking.
Thank you, Marc Surie
Response:
If you're machine does not have a physical switch that allows you to change
from OD to ID chucking (and vise versa), it's likely that the machine tool
builder has included two M codes for this purpose. Check the machine's list of
M codes to find those related to clamping direction. Frankly speaking, more and
more machine tool builders are not supplying the physical switch, since
if this switch is thrown during the machine's operation, the results could be
disastrous. M codes help them avoid switch interfacing headaches.
Keep in mind that even if you have M codes for clamping direction, most
machine tool builders do not intend that you use them in a program. Instead,
you must command their execution in the manual data input (MDI) mode. Again,
this gives you the ability to reverse clamping direction but keeps it safe and
easy for the machine tool builder to provide clamping direction reversal.
