Need Help!- Fanuc 18i acting crazy

[luke1626]

Hey guys. We have a Cincinnati FTV 850-3700 with a GE Fanuc 18i MB control. It has been running fine until last Friday. I thought the x axis servo motor was gone, but come to find out, a parameter was changed that distinguished the type of motor. When I run a program, it automatically changes the parameter number that ='s the program number bits 0 and 1 to 1.
It doesn't do it if i power off and restart the program, but if I stop a program for any reason and reset i, it will either do this or give me alarm #5111 Improper Modal G Code (G05.1) . I'm not even using G05.1. Any help will be greatly appreciated.

Thanks,

Luke

[stevo1]

What changed the parameter and what parameter # was changed?

Is the program changing parameter bits? Can you maybe post your code were you are getting the alarm "IMPROPER MODAL G-CODE" (G05.1)?

Stevo

[luke1626]

The program number was 2001, so it changed parameter 2001. When I run program number 2007, it changes parameter 2007. The program is just a simple program to skim the top of some blocks.
T2 M6;
G00 G90 G55 X0 Y0 S1200 M3;
G43 H02 Z1. M8;
G01 Z-.05 F50.;
G01 X10. F20.;
G00 G91 G30 Z0.;
G30 Y0.;
M30;

[f-bu]

Silly idea, but who knows...
Every one of T2 and M6 can call a macro program. Look inside all the macro programs for
G10 L50 ;
You can see the format of programmable parameter change in op. manual chapter 17.
Motor type is in PRM. #2020
Though I am not sure if servo parameters can be changed and why alarm #000 is not on.

[sinha_nsit]

Originally Posted by f-bu Silly idea, but who knows... Every one of T2 and M6 can call a macro program. Look inside all the macro programs for G10 L50 ;

You can save time by running the program block-by-block, and verifying if T2 or M6 do jump to some other program. If yes, the called program would appear on the screen, and its program number would be displayed on the top of the screen.

[MysticMonkey]

2001 = AMR = 00000000

This is only changed for Linear LiS Motor

Parameter 2000 will make changes to all servo parameters according to what is set in 2020

[stevo1]

Luke,
How long have you had this machine and have you ever had this problem before?

Check to see if you have any macros being called with the M6 or the S and T.

I see no way other then the G10 as f-bu suggested that these parameters would change.

What does the actual bits change to when you run a new program? Do the same bits always get set? IOW if you run program 2000 does it set the bits as an example like 01100100 and if you were to run program 2001 will it set parameter 2001 the same way 01100100? Is it a possiblility that someone messsed with the programs?

Stevo

[luke1626]

Thanks for your help. We got the problem figured out, come to find out, the Cincinnati's have a button for path control, which enables G400, its similar to G05.1 or G05. Apparently an operator had turned it on and didn't realize it. When u do a tool change or reset the program, it causes the parameters to change for some reason, one of the guys from Cincinnati said they had a problem with it causing mirror to become active after tool changes a couple years ago.

Thanks,

Luke

[stevo1]

Wow sounds like a design flaw to me. I would disable the button on the control. Even if the machine was changing parameters it should have been set to only change the ones needed not based on the program number.

I had a guy once accidently activate mirror image on one of our mahcines about 10yrs back and it whiped out an indexer and a drive on a million dollar mahcine. It cost about 100k and a month downtime to get it back up and operational.

Stevo