[bgrdtruk]

I've programed Fanuc controls for a while now and I was asked a question the other day by a new guy that ran Okuma's before. He asked me if Fanuc's could run "subs" that are attached to the bottom of the main program like Okuma's can.

One reason I ask is we were running a program using a standard sub and the control would hesitate when switching between the main program and sub. When we run a sub that repeats (M98 P1000 L20) it also hesitates.

I think the hesitation is because the control can't read fast enough to make a reasonably smooth motion but that is just my guess. I was thinking that if the control would allow a sub in the main it would not hesitate as much.


Thanks

Steve

[dcoupar]

You can use M99 Pnnnn in a program to "jump" to a sequence number in the same program.

If your control has the Custom Macro option, you could add a counter and an IF statement to exit the branch when the counter reaches 21.

I'm not sure how much faster this would be, however.

[tc429]

I never tried, but theres parameters that set non-bufferred m codes- might try (carefully) with setting to 98 (and 99 for the return) and trying it. any non motion block in a fanuc results in in-position check- I think though if defined as not bufferred, might just buffer the next line(needs to be a motion block to prevent stops). I'll have to try it when I get a chance too
Tim

[sinha_nsit]

I believe, the sub/macro has to be a separate program in Fanuc.

[christinandavid]

If you can use macro b on the control, and if it is suitable for your needs, I find a repeating WHILE, DO loop to be quicker than IF, GOTO.

DP

[sinha_nsit]

I find a repeating WHILE, DO loop to be quicker than IF, GOTO.

That is true.
I actually verified it with a stop watch some time back.
The reason perhaps is, GOTO has to search all the sequence numbers, whereas WHILE_DO_ loop is fixed.