Fanuc 32i Incremental

[Randy Morton @ Clem Industrial]

Hey,

 

I have a Fanuc 32i control on my lathe. I was wondering, since basic principles are based on mill g-coding, how can one move incrementally and absolute in the same move?

 

Example from the past; make a bevel: X2.5 W-.05

Example from now: X2.5 Z-.8865

 

Fine, call me lazy (I hate to see what comes next), but why work out the Z dimension when I can just tell it how much to move? But can that be done anymore? I now need G91 to move INC. on this control. Can I do (G90) X2.5 G91 Z-.05 ??

 

Thanks!

[Hymen]

Just a guess but I'd have to say no! It's only a computer not a Magic Machine. JK

Wait how about (G90 X2.5 Zchamfer-.050 )

Try it. Lemme know how it goes.

Really though can you do that on a mill?

G91 X2.5 G90 Z.05

Almost positive you'll alarm out with illeagal G-code. Or you'll get 2 moves.

[Hymen]

Sry man if you hadn't expected it I wouldn't have done it.

This isn't allowed with the 32i controller?

G90 X2.5 W-.05

I would think that this would still be a valid line.

Running 16i so I really don't know!

If it isn't valid that would blow making it more difficult!?

Only have 32i on a mill here.

Anyone know the differences between the 32i and 16i?

 

Edit: Aren't the differences mostly to do with positioning and under/overcutting on corning during milling at high speeds?

Edit:Edit: Nope I'm way off! and the mill is 16i

I'll go back in my hole.

[3rdstring]

quote:

---

Anyone know the differences between the 32i and 16i?

---

I'm gonna say 16

 

 

We have a few hardinge machines with an 18 T control & the operator will key in something like

code:

---

 ,A45Z-0.05 

---

to get a 45 deg camfer.

 

HTH

[Hymen]

Yur right! the i's cancel.

I don't have that many fingers.

Did you use a calculator?

[Hymen]

http://www.gefanuc.com/en/ProductServices/..._32i/index.html

Wow thats one slick controller!

PDF:

http://www.fanuc.co.jp/en/product/catalog/pdf/mgi-ce02.pdf

[Guest CNC Apps Guy 1]

Yeah that control is a SERIOUS work horse that will mow through some code!!!

[Randy Morton @ Clem Industrial]

It is a slick control, actually. I got the answer. In Fanuc systems there is 3 G code level (A,B,C) and we are on B. B level uses G91 for inc. mode. A level uses U & W for inc. mode. That's basically the only difference. So, my mfg. provided me with the parameter and it works like a hot darn to use U & W now instead of G91 (which on a lathe is kinda silly, if you ask me).

 

=] Thanks for the input!!!

[Guest]

Movin' up there in the machine world Randy.

 

[tryon]

I think G91 is silly on a mill and wish U,V, and W could be used instead. oh well not really a big deal anymore with cam though.

 

jmho

[Mike Mattera - TFM]

Did you try it? Many modern controls can do it.

 

G90 X(abs. position) G91 Z(incr. move)

I would create a simple line like this and see if it works.

 

You can do it on a Heidenhain.

 

Mike Mattera

[Randy Morton @ Clem Industrial]

This is my actual control from our new Gildemeister CTX 410 lathe (with Mill abilities). It is actually really good, but I have found that Fanuc kinda took a step back in some programming aspects for the 32i control.

 

On my last machine (21T Fanuc Lathe) to send a program, you had to either have it highlighted or be in the program and just hit send. With this control you must type the program name, pust 'p set' and then send. An extra step that is not so much needed, from my view.

 

As well, if you look at the picture on the bottom left there is a turn dial. That controls the feed over-ride and the rapid over-ride. Yes, it does control both. Yuck. So if you want to turn the rapids down to come in close to a part, you must crank it back up when running, then at the end crank it back down before it moves away (first run safety stuff...you know what I mean I am sure).

 

All and all good control, but just a little quirky compared to the old stuff.

 

It also has the Manual Guide i that Hymen gave links to. Basically conversational programming...basically. It's an ok system, but I don't have time for that kind of stuff right now. And the graphics, well, let's just say that they have a little to be desired....but they are better then the little lines moving around a graph screen from 10 years ago!

 

[dougm]

Randy

Do you use the G0 limit button ?

(above the chip conveyor buttons)

I have a ctx 420 linear and a 180i control

Doug

[heavychevy2155]

at least its not a siemens control on a lathe it takes 7 steps to shoot out a file and 8 steps to receive a file. That makes for a long day running short run parts, one-offs and the like.

[Randy Morton @ Clem Industrial]

Doug, we do have a limiter for 25% maximum, but (I know, mine is not the linear like yours) 25% of 1,200 IPM is still freaking fast, and can be a little wrenching on the nerves.... The button kinda looks like a circle with a line thru it (like a no smoking sign) and a G0 in it (I think).

 

Kinda annoying, but, I suppose all I can do is get used to it. *sigh*