Fanuc O-MB incremental input

[MPE racing]

Can anybody help me here. I'm used to using a HAAS machine, however we purchased a Mill with a Fanuc controller(O-MB) and I'm curious as to how to add incremental values when doing work offsets.
Lets say you have set the X and Y but want to adjust it by an amount. Instead of calculating the new value, can you just type in an incremental amount and add it to the current value without overwriting what you already have.
Or alternatively, can you move the bed to a certain point and somehow input that value by pushing a button as opposed to typing the value in.
On the Z axis, we can Hold EOB and push the Z button, and it will automatically bring up the Z value. Then I push enter and it enters the value. I would like to be able to do something similar with the X and Y.

Can anybody help me here.

Thanks in Advance
Greig
Motorcycle Performance Engineering

[HuFlungDung]

Hi Greig,

I'm not sure how you are accustomed to working, but I always use an appropriate Gcode to define the tool's position relative to to the part datum. In particular I use a G92 command but this may not be what you would use. This does require actual editing of the code.

It sounds like you want to make a movement outside of the work coordinate system. However, it seems to me that you could get yourself in a lot of trouble doing this because on the next work offset, you would still be carrying the error of your previous mdi movement. Sounds like a recipe for scrap I may not be understanding what you are saying though.

[cadcam]

MPE Racing in the Fanuc O-M control you can not do as you except. the control wants a exact numer to be inputed in to the control.

I agree with the Haas this is vary easy just add or subtract the amount you want to change and you are of and going.

[hardmill]

Do some research on using varables to shift the machine.
See what the machine will and wont accept.
If you show me exactly what you need i'll take a look when
i get home i'm on my way out.
Varibles are always a quick, short and easy solution when
you understand the basics.

And congrats on the fanuc. Their great controls.

PEACE

[dpaulson]

Will G92 Set program part zero do anything for you?

[cadcam]

you use the G92 instead of useing a G54,G55 and you need to find the pickup location from Machine home and input this info to the front of the program.

[MPE racing]

Thanks guys. I'll have to keep doing it the way I have been already I guess.
I like the idea of using variables Hardmill. My machine doesn't like G92 at the moment unfortunately, but I'l look at that. I'll be setting up some quick change set-ups on the machine, and when we have these I might set a bunch of home positions using variables to store them. This way if we have to work on the machine, and the positions change, it's only a matter of resetting 2 variables and we are away again. Cool idea, thanks.

Here's another question. The tool diameter offset has to be input as a radius. Is there a parameter or something in the controller to convert this to a diameter. Another HAAS thing I'm used to. It saves having to think too much when adjusting offset diameters as well.

Thanks in advance again

Greig
Motorcycle Performance Engineering

[cadcam]

You do know that the Haas will do either Radi or Dia it is a option in the Pramaters?

[MPE racing]

Will the Fanuc allow it though? That's what I have

Greig

[hardmill]

Originally posted by hardmill Do some research on using varables to shift the machine. See what the machine will and wont accept. PEACE

Are you referring to variables?

[MPE racing]

Does the Fanuc have a parameter to change from radius to diameter.

Greig

[cadcam]

MPe I think it does I will see if I can find the Pramaters if it does.
This is the Fanuc O-M control correct?