Fanuc resetting in automatic

[skidoo]

Hi,

I have a Fanuc 21i-T Control on a kia skt300 lathe and I would like for the program to return to the beginning when reset is pushed and the machine is in Auto mode. At present the program only resets to the beginning when it is in Edit mode and the reset is pushed. Is there a parameter which can be changed to enable this in Auto mode?
I want to have the same as okuma lathe. We have 3 crash with this problem
because the operator don't reset the machine correctly.

thank-you.

[stevo1]

I have never seen any parameters that can be changed to achieve what you need. I will take a quick look through the parameter manual when I get a minute but I am pretty sure that the program will only return to the beginning if you are in Edit mode or a M30 is programmed.

My best advice would be to properly instruct you operator how to rest a program. It should be pretty common practice to always do a "edit", "program", "rest". Or you need to eliminate the need to rest the program when it is running. What is the reason that the program needs to be rest before it is finished?

Stevo

[Dan Fritz]

I believe that what you're looking for can be done in the ladder. When you execute an M30 in Auto mode, the program resets to the beginning because the decoded M30 output bit is tied to the RRW (Reset ReWind) input bit. When you press the RESET button on the operators panel, a bit called RST is turned on momentarilly, so you could put an "OR" function in the ladder so that the M30 output OR the RST output will turn on the RRW input.

You may have to put a short timer on the RST -> RRW rung of the ladder so that RST turns on RRW for only a short time because I believe that RRW will also turn on RST internally, creating a "lockup" situation where the RST signal comes on and stays on forever. That would be bad.

I can't offer any advice on editing your ladder because I've never done it on a 21. Maybe some other forum members have experience editing a Fanuc 21 ladder.

[hrh]

I think you can "rewind" to the beginning in Memory or Auto Mode by pressing the > softkey once and then a softkey for [REWIND] will be displayed. Press [REWIND] and the cursor will jump to the program header.

[skidoo]

Originally Posted by stevo1 I have never seen any parameters that can be changed to achieve what you need. I will take a quick look through the parameter manual when I get a minute but I am pretty sure that the program will only return to the beginning if you are in Edit mode or a M30 is programmed. My best advice would be to properly instruct you operator how to rest a program. It should be pretty common practice to always do a "edit", "program", "rest". Or you need to eliminate the need to rest the program when it is running. What is the reason that the program needs to be rest before it is finished? Stevo

Sorry for my english.

The parameter #3402 bit #6 make a reset and a rewind but only in MDI.
I would like to have the same in auto. The reason it's we have many okuma machine and when the operator work on a fanuc control foget to rewind the program !

I want to have and " idiot proof" system.
For the ladder, we have 6 different machine with different control.
It's complicated to change the ladder of each machine.

[psychomill]

However, there is a parameter that resets the control to the beginning of the program when it reads a "M30" or "M2"...(3404.4 and 3404.5) Why not not just check that setting? Are you guys having to constantly rerun the first tool of the program or something?

[stevo1]

There is no parameter that I seen that allows you to rewind to the beginning of the program when you are in memory.

So as Fritz has said you would have to alter the ladder in order to acheive this. I know this is something you don't want to do but if you continue to have problems and create scrap the benefit might out weigh the cost.

As I had asked before and as Psychomill is asking why is the program being reset before it reaches the end?? If you program a M30 or a M2 at the end of the program with the parameters set according to post #6 the program will rewind to the beginning when you are in memory mode.

Stevo

[ALLtra Mach]

He answered that, His operators are also running Okuma controls which have this function. He is trying to make his Fanucs act like the Okumas so that his Operators don't have to remember which machine they are at. Just a guess, but if operators can't keep up with this, probably button pushers you do not want into edit mode? Maybe?

Any way, you cannot do this without changing the ladder, as has been said.
And the soft key rewind feature is not a fanuc feature, you must be running a control with an OEM front end.

[stevo1]

Originally Posted by ALLtra Mach He answered that, His operators are also running Okuma controls which have this function. He is trying to make his Fanucs act like the Okumas so that his Operators don't have to remember which machine they are at. Just a guess, but if operators can't keep up with this, probably button pushers you do not want into edit mode? Maybe? Any way, you cannot do this without changing the ladder, as has been said. And the soft key rewind feature is not a fanuc feature, you must be running a control with an OEM front end.

He did not answer my question. The question is why is the program not running to the end??? I don't care if his operators are running a Okuma control or a Fanuc control. That make no differnce at all to the question being asked.

If he does just have button pushers then the progam would run from start to finish. And if he put a M30 or M2 at the end of the program it would then rewind to the beginning. Obviously the program is being stopped somewhere in the middle via feedhold, M1 or M0 and the operators are resetting at that point like Phsycomill and I have stated which is why we pose the question “why is the program not running through?”

The reason it is asked is because if the program is being stopped part way through with a M0 or M1 there are ways of programming around this so he does not have to change the ladder to reset to the beginning. You could program to the scenario of Psychomill that if they have to reset because they run the first tool more than once they could have the option to continue on with the program if they don’t need to rerun or have the program rest to the beginning if they do need to rerun.

Stevo

[ALLtra Mach]

LOl..I stand corrected

[stevo1]

If I had a nickel for every time I was corrected I would be living it up in the Bahamas with a perfect 10 girl on each side of me .

I like to use enlightened instead of corrected. Sounds much better.

Stevo

[skidoo]

I found in the ladder of a machine the rewind with the m30.
I don't find the rewind with the reset " rst".

The reason why I want this it's exemple today a guy read a program in
Bg edit and He have a problem with the communication. He push the reset button to cancel the read but in the same time the machine stop !!
He put the cycle start to continu like an okuma but it's not an okuma.
The machine start in the middle of the program and the tool hit the part ...
And other crash today........

This is an exemple of the plant in canada but we have a plant in china too...
It's very complicated to explane to a chines guy.. reset in memory or rewind the program when you have an alarm etc....

I made my programs "idiot proof " but it's impossible to never have a crash
with chines people (we have the same problem in canada)

exemple of my program

$O2046.MIN%
O2046(PROCESS #2)
(2008/10/13/20) (SKT300-MS-1)
(JAW # REP. #3 MS)
(PRESSURE 12-LOW M66)
G30U0W0P3
G28B0.
G50S2000
G20G40G54
M66
(** FACE+OD HUB = T0304 **)
N100G97S500M03
N102T0304
(X=DIAMETER HUB PART)
(Z=THICKNESS FINISH PART)
(H=THICKNESS CASTING)
(D=LENGTH OF MACHINING HUB)
(F= FEED OF FACE)
(S=SPEED IN G97=RPM)
G65P9223X1.95Z1.345H1.41D0.65F0.018S1000
N130M01
(** DRILLING **)
N200
(#507=NUMBER OF THE TOOL)
(#509=DIAMETER OF BORE)
(** Z=THICKNESS FINISH PART **)
(** W= Z OF END DRILLING **)
G65P9200Z1.345W-0.40
N230M01
(** RESTART FINISH BORE HERE**)
N400
IF[#509 LT 0.4130]GOTO2001
IF[#509 GT 1.1875]GOTO2002
IF[#509 LE 0.6298]GOTO700
IF[#509 LE 0.9840]GOTO800
IF[#509 LE 1.1875]GOTO900
GOTO2005
(#503=PUT 3 FOR 3 FINISH BORE)
(#508=NUMBER OF THE TOOL)
(#509=DIAMETER OF BORE)
(#510=TAPER BORE AT THE END)
(Z=THICKNESS FINISH PART)
(W=Z OF END FINISH BORE)
(C=CHAMFER SIZE)
(E=FEED FINISH #1)
(F=FEED FINISH #2)
(V=SPEED IN G97 FINISH #1)
(S=SPEED IN G97 FINISH #2)
(** TOOL 8MM **)
N700T0707
N720 IF[#508 NE 7]GOTO2004
G65P9305Z1.345W-0.1C0.03E0.010F0.008V1500. S1250.
N740
GOTO3000
(** TOOL 12MM **)
N800T0708
N820 IF[#508 NE 8]GOTO2004
G65P9305Z1.345W-0.1C0.03E0.013F0.011V1500. S1500.
N840
GOTO3000
(** TOOL 20MM **)
N900T0709
N920 IF[#508 NE 9]GOTO2004
G65P9305Z1.345W-0.1C0.03E0.013F0.011V1500. S1500.
N930
GOTO3000
N2001THEN#3000=1(#509 IS TO SMAL)
N2002THEN#3000=2(#509 IS TO BIG)
N2004THEN#3000=4(VERIFY #508=#OF TOOL)
N2005THEN#3000=5(VERIFY #509 DIAM. BORE)
N3000M05
N3010T0300M12
N3020 #512=#512+1
N3100M30
%