NEDD HELP PROGRAMING TO CUT A THREAD ON A CNC MILL

[malirami]

I need help. I'm trying to mill a thread on my cnc mill with a FANUC 11M MODEL A Control and I have this alarm :
PS 186 ILLEGAL PLANE SELECT . Do I have to change the way that I'm programing?The subprogram is:G91 G02 I0.500 Z-0.125 F10.0

[Superman]

Fanuc and Okuma are similar

We have to state the I and J on a line doing full arcs

Suggest placing J0. on your line in the subs

I am also assumming you are in the G17 (XY) plane

[malirami]

Thanks , I'm going to try that and Yes I,m using G17 I should have to change that?.

[broby]

If you do not program I or J the controller will assume that the value for them will be 0 (zero), i.e. no need to program I0.500 J0 as J0 is assumed.
I would suggest that your problem is that you may not have the helical move option on your control, thus explaining the reason for the Plane error.
Even if you do not have the helical move option, you should still be able to program arc moves on the XZ or YZ planes using the G17 G18 G19 plane selection commands.

[malirami]

I think so , because I have programed on other machines with different controls and never had a problem.On this one I tried with G18 , G19 and I made the program with GIBBS CAM too but I get the same alarm.

[Superman]

a quick check,
program an arc using X,Y I, J
prove that it runs
now add a Z to the block

We have one machine that interpolates only in 2 axis, ( cannot ramp on arcs )

[malirami]

I tried something like that , but let me see again.thank you superman.

[chopkins]

Try programming 1/4 circles.
Takasaya mills will only spiral 90 deg or less.
This should work.

[malirami]

ok, let me try thta too.

[malirami]

Thanks

[jimmytightpants]

on the mill I run if we want to cut an arc while moving in the Z we have G2.1/G3.1 instead of G2 and G3. see if your machine has something like that.

[malirami]

OK.