[jeppes]

I don´t know which number my fanuc has a,b,c or....?
OMM: 0A66-19
PMC: 0F-K
Which one shows what it is?
I'm trying to get it to dripfeed, is that possible, and how?
I've tried to change parameter G127 without any luck. Is it because its not possible to change?
Is there anyone who can explain this to me in a simple way?

Thank you
-Jeppe, Denmark

[Al_The_Man]

The G127.5 is not a parameter per se but a internal register that is used to pass information from PLC-> CNC.
This is set by a switch installed by the MTB or OEM as an option.
When the switch is set the DNCI bit (G127.5) changes from 0 to 1.
See attached PDF.
Al.

[jeppes]

Thanks AL_the_man
So you say it is possible to DNC with my Fanuc 0M?? The machine is a LEADWELL MCV-OP..
Jeppe DK

[GPena]

Jeppe:

To work in DNC mode depends on your machine, if you are able to see the ladder (usually possible in B,C and D models) you can search for 127.5 coil; if it is there then the DNC mode is installed, just see what is in the line to activate 127.5. If not, then you'll have to install it by adding a line in the ladder, we have a ladder editor for 0A(some versions), B, C and D; if it is required.

If you can't see the ladder and you do not have the tape mode I will suggest that you go to auto mode and press every button in the operators pannel to see if the signal 127.5 turns on.

Please let me know what happens to see if I can be helpfull.

Greg.

[samu]

how can i see ladder on a 0-MB??

[Al_The_Man]

how can i see ladder on a 0-MB??

Should be parameter 0060.2 set to 1 if possible on this version.
Al.

[GPena]

Samu:

Well, press key "PRM/DGNS" several times, the first time it'll take you from parameters to diagnostics, the second time from diagnostics to ladder. Sometimes it is not possible to see the ladder on 0B controls due to a control condition, let's say 50/50 of the times. If you can not open the ladder in the machine then you'll have to use a Fanuc Ladder console to do that, we have one; if you need it please let me know.

Greg.

[jeppes]

Hello Greg ... I can see the ladder in the controler and in the book
|-D480,2------G127,5-| But what is D480,2? I have tried AUTO and pressed all the buttons without any luck.. So what to do now, any suggestions ?? I use Cimco on the Pc..
Jeppe S

[GPena]

Jeppes:

D480.2 refers to diagnostic 480 bit 2, change it to 1, check the ladder after that, signal 127.5 must be on, with that you'll have the DNC option active.

Greg.

[jeppes]

Jeppes:

D480.2 refers to diagnostic 480 bit 2, change it to 1, check the ladder after that, signal 127.5 must be on, with that you'll have the DNC option active.

Greg.

Thank you Greg, you're my man...
I made my first feed dripping yesterday. Do you now if´its possible to make a manual switch instead of changing the parameter?
I'll buy you a beer if you ever come to Denmark...

[GPena]

Jeppes:

That beer sounds good, Denmark is a little bit far from Mexico, so, maybe it will have to wait, thank you for that invitation. About your question:

It is possible to enable the DNC mode with a button on the operators pannel of your machine, unfortunatelly to do that you'll have to install and wire the button (easy thing) and edit the ladder to change the line with a fanuc console and that will cost about $1,200.00 us. If you want to do it let me know, maybe we can help you, otherwise you'll have to change the diagnostic every time.

I am glad I was able to help you.

Greg.

[toranacar]

Hi guys
This is an old thread but I have a similar issue.
Im about to purchase a Leadwell MCV-OP Fanuc OM
I also need to find out more about drip feeding this machine, so is this thread regarding OM or OM A, B, C???
Thanks
Bart

[m1n1m]

Hi guys
This is an old thread but I have a similar issue.
Im about to purchase a Leadwell MCV-OP Fanuc OM
I also need to find out more about drip feeding this machine, so is this thread regarding OM or OM A, B, C???
Thanks
Bart

Is it a OMate? On both mate and om-c you can hit prog button until ladder comes up and then you search for G127.5. You should be able to tell from the ladder what needs to be activated to set G127.5 to 1 from the ladder. If you attach pictures of the ladder here we can tell if it's connected to a diagnostic parameter or a physical button. When I rewrote my ladder to include G127.5 I hooked it up to a spare digital input that I wired to a physical button. It's nice to be able to switch between local and dnc quick.

[toranacar]

Thank you for the reply.
Ive been talking to these guys and wondering what software I should get.
Predator CNC Editor Express - Predator Software Inc.
Predator CNC Editor - Predator Software Inc.
And Cam Soft.
Ladder im guessing the wiring input/outputs? Of the RS232???
I don't have the picture of this but I will try to get it to you.
It is a Fanuc O-M control.Attachment 421260

Reply from Predator Software
So it can be a bit tricky. Technically there are four possibilities:

1. On the operator panel there are a series of buttons for the main modes MDI, Edit, Automatic, Jog and hopefully Tape. Tape mode may also be labeled Remote mode.

2. On the operator panel there is a rotary switch for the main modes. Again look for a Tape or Remote position.

3. Some Fanuc 0s don't have a Tape/Remote button or a Tape/Remote switch position. But, they do have a special procedure to enter Tape mode. Which is not common knowledge and is what I have documented at the office.

4. Finally, your concerns are correct. The earliest/oldest Fanuc 0s don't support Tape/Remote mode at all. When you boot the CNC there is a revision letter that is also important to determine the age/capability. Look for a Fanuc 0M A, B, C, D, E, F etc. Again, the letter revisions which will/won't work is documented at the office.

Have you purchased the machine already? Can you discuss this point with the previous owner?

Thanks,

Jim

From Cam Soft
Drip feeding via an RS232 serail from the PC to the Fanuc is a standard feature of our Advance System 3000 CAD/CAM software.
Which means you get a CAD/CAM system which you don't have to use.
The documentation shows a diagram on how to make the RS232 cable for a Fanuc 0M control.

The cost is only $199 when you purchace direc. Plus $59 for an Optional USB hardware ket (dongle). Retail or Dealer prices ar $1,295

(1) You got to be sure that your Fanuc has a RS232 port.

(2) You also want to be sure you already know how to set up the Fanuc to send and recieve programs.

(3) Drip feeding is different than downloading on a Fanuc. You should know how to set up the Fanuc parameters to configure the XON and XOFF characters that enable the dripping start and stop process.

[m1n1m]

Thank you for the reply.
Ive been talking to these guys and wondering what software I should get.
Predator CNC Editor Express - Predator Software Inc.
Predator CNC Editor - Predator Software Inc.
And Cam Soft.
Ladder im guessing the wiring input/outputs? Of the RS232???
I don't have the picture of this but I will try to get it to you.
It is a Fanuc O-M control.

Reply from Predator Software
So it can be a bit tricky. Technically there are four possibilities:

1. On the operator panel there are a series of buttons for the main modes MDI, Edit, Automatic, Jog and hopefully Tape. Tape mode may also be labeled Remote mode.

2. On the operator panel there is a rotary switch for the main modes. Again look for a Tape or Remote position.

3. Some Fanuc 0s don't have a Tape/Remote button or a Tape/Remote switch position. But, they do have a special procedure to enter Tape mode. Which is not common knowledge and is what I have documented at the office.

4. Finally, your concerns are correct. The earliest/oldest Fanuc 0s don't support Tape/Remote mode at all. When you boot the CNC there is a revision letter that is also important to determine the age/capability. Look for a Fanuc 0M A, B, C, D, E, F etc. Again, the letter revisions which will/won't work is documented at the office.

Have you purchased the machine already? Can you discuss this point with the previous owner?

Thanks,

Jim

From Cam Soft
Drip feeding via an RS232 serail from the PC to the Fanuc is a standard feature of our Advance System 3000 CAD/CAM software.
Which means you get a CAD/CAM system which you don't have to use.
The documentation shows a diagram on how to make the RS232 cable for a Fanuc 0M control.

The cost is only $199 when you purchace direc. Plus $59 for an Optional USB hardware ket (dongle). Retail or Dealer prices ar $1,295

(1) You got to be sure that your Fanuc has a RS232 port.

(2) You also want to be sure you already know how to set up the Fanuc to send and recieve programs.

(3) Drip feeding is different than downloading on a Fanuc. You should know how to set up the Fanuc parameters to configure the XON and XOFF characters that enable the dripping start and stop process.

Don't get anything yet. I use fusion 360 for CAD and CAM. It's free until you produce for more than $100k/year. Start with that for testing and see that everything works before you spend anything on CAD/CAM software if you are within the limits. If not start it as a trial version so you can test it.

I'm not an expert on these machines and I only know what I found out on my O Mate and OM-C so take this info with a grain of salt but I figured that it's better to tell you what I know than saying nothing :P I haven't worked on a Fanuc OM (without -A/B/C extension). Is it an older version?

By ladder I mean the PLC program in the fanuc controller. If you look in the attached files this is how the ladder diagram looks in a fanuc om-c. If the machine isn't to old you should be able to enter this screen by tripple clicking the diag button I think it was. If it's old I've heard you either need a readout or look in the machine documentation if there is a printed version of the ladder. If you have documentation that your machine has drip feed enabled then you can just follow that but if you don't know you can search in the ladder for "G127.5". You will find it in the right side as an output to PMC and the symbols left of it tells you what needs to be enabled/disabled to have it set to "1". In the example I attached X002.0 and X008.0 needs to be on and the rest is off. X002.X is the four inputs from the mode switch on my machine and at this state it's in "auto" and X008.0 is a spare digital input I used to enable drip feed by a button I mounted in the front of the machine. In your machine if it's programmed it's most likely bound to a button in a similar fashion or it's connected to a "Dxxx" diag parameter so you can enable/disable it from a diagnostic parameter. G127.5 was not programmed into my machine so I added in my ladder.

For drip feeding I use a free program but it only runs on 32bit systems. I just use a old computer that is dedicated for the cnc. An old computer with a proper comport is preffered btw. You can use usb to serial but nothing beats a native port with hardware interrupts I think. There are some good ethernet-dnc solutions and ethernet to rs232 converters also but I haven't tried them on fanuc yet.

[zavateandu]

Hi guys
This is an old thread but I have a similar issue.
Im about to purchase a Leadwell MCV-OP Fanuc OM
I also need to find out more about drip feeding this machine, so is this thread regarding OM or OM A, B, C???
Thanks
Bart

if you go and activate the diagnose D481 BIT 0 to 1 you will have DNC function on
good luck

D481.0=1 DNC ON

[toranacar]

if you go and activate the diagnose D481 BIT 0 to 1 you will have DNC function on
good luck

D481.0=1 DNC ON

Yes DNC is on.
Need to figure out changing ladder for drip feeding

[toranacar]

Yes DNC is on.
Need to figure out changing ladder for drip feeding

Can't see how to change the ladder

[Anders_K]

TAKANG VMC – Fanuc 0M model C 1992. This is what it says in the papers. BUT at startup it says PMC: 0001-A2. So if it really is a C-model? Would like to dripfeed. I have changed diagnostic 480 bit 2 to (1) in order to activate DNC, nothing happens. Then I would check the ladder to see if I can find signal 127.5. If I press SRCH in the ladder program, I get “ILLEGAL OPERATION” and can’t then make a search. Can anyone tell me how to check the ladder or another way to check if the machine is able to dripfeed?

Best regards
Anders K

[Zdravko Dren]

Did you input G127.5 and then SEARCH?

I don't know any other way, I'm very new to dripfeed, just managed it few days ago, also with D480.2.

I searched for G127.5 in a ladder, and in the same line I found 480.2, changed it to 1 and voila, I DRIPFED seconds later:-)

I tried a little program like this:
...
G1X0.01F500
G1X0.01
G1X0.01
G1X0.01
...
but feddrate was only around 20mm/min.
Is it baudrate, buffer or something else related?

p.s. I just found this, I'll check it tomorrow:
"The DC3 code is output and reading is stopped at the end of each block
(each time the EOB is read). To enable continuous reading of the
blocks, specify bit 7 of parameter 0390 accordingly"