Fanuc CBT button

[g huns]

What is the purpose of the CBT on my Fanuc 16m control? I've never learned the control as good as I should, just write toolpaths send to data server and cut. I have a new guy starting to set-up and run the machine cause I'm swamped with paths to write and the darn thing cuts to fast. He had the machine come to an abrupt halt this morning and didn't know why. The main power switch was on trip and when we started it back up the CBT light was on.

[Hardmill]

CBT is circuit board trip.

Turn it on when you go home and it will power

down the machine for you when it reads an M30 (M2)

 

 

PEACE

[DavidB]

+1 Hardmill

For the main power to be on trip sounds like you set the auto power off option on.It came to a M30 or M02 and triped the main power.It uaualy resets on power up again.

[Tom Dorgan from American Precision]

Is this an option that can be set at control or an option that Fanuc has to turn on? I do some long run engraving jobs that I leave running at night but only have M codes to turn Vac pumps off not the machine. We use Fanuc 18iB controls.

[Hardmill]

quote:

---

We use Fanuc 18iB controls.

---

I would think you would have a CBT or a "auto-source off"

button somewhere on your machine.

 

 

PEACE

[?Mark]

quote:

---

Is this an option that can be set at control or an option that Fanuc has to turn on?

---

On Fanuc it's "M20" code for automatic power shut off. Check your manuals first to make sure.

Some machines have a little switch called power interception switch (I think) right next to a main switch, then when tripped will shot down a machine after getting to M30.

 

Regards, Mark

[Tom Dorgan from American Precision]

The reason I asked is that we build our own routers but also run a production shop with some of them. Our EE that writes the logic won't tell us all that they will do and sometimes I sneak in and enable a bit here and there where I know how to make some things work. We don't have a CBT button of any kind on our machines but IF I could turn on a parameter that would activate it that would be sweet. Time to start digging in the Jinglish Manual. Nothing comes up under CBT or Circuit board Trip on an initial search though.

[?Mark]

quote:

---

Nothing comes up under CBT or Circuit board Trip on an initial search though.

---

Try looking in your M code list, maybe it is there.

Regards, Mark

[Thee Cutterman]

quote:

---

On Fanuc it's "M20" code for automatic power shut off. Check your manuals first to make sure.

---

From memory you had to change a parameter setting for it to recondnize the M20.

 

+100 for checking the manuals first

 

Regards

Darren

[George_Gerhard]

The M20 is not fanuc, but unique to this particular machine tool builder. I have written logic that if you flip a switch and the machine is not active after a certain time period the control will be turned off.

Please be careful M codes are not written by Fanuc, but by the machine tool builder. I could very easily have M777 be the code to start the spindle instead of the industry standard M03

 

rgds

George