Full radius turning, fanuc

Numbah1 · Nov 9, 2020

I have puma tt1800sy with fanus series 31i, trying to make a full radius. Off the face my print calls out a .748 dia, .124r on top of the arc, wraps 180* to a .051r the other way into a .498 dia body. I tried to use a n123f2-0318-ro h13a, .0625 rad, .125 wide (part is alu) had .0625 on my tool offset under R, i tried t8 & t0 on the t column.

I wrote;
G0 z0
.x850
G1 .686 f.004
G03 z-.249 x .686 r.124
G02 x.498 z-.300 r.051
G0 x1.

Tried ALOT of different numbers. Nothings working, its so high in x. Not sure whats wrong. Idk where to get the definition of the t column #'s, but my co worker thinks that is whats wrong. Appreciate any help

Delw · Nov 9, 2020

Numbah1 said:
I have puma tt1800sy with fanus series 31i, trying to make a full radius. Off the face my print calls out a .748 dia, .124r on top of the arc, wraps 180* to a .051r the other way into a .498 dia body. I tried to use a n123f2-0318-ro h13a, .0625 rad, .125 wide (part is alu) had .0625 on my tool offset under R, i tried t8 & t0 on the t column.

I wrote;
G0 z0
.x850
G1 .686 f.004
G03 z-.249 x .686 r.124
G02 x.498 z-.300 r.051
G0 x1.

Tried ALOT of different numbers. Nothings working, its so high in x. Not sure whats wrong. Idk where to get the definition of the t column #'s, but my co worker thinks that is whats wrong. Appreciate any help

Are you on drugs

seriously your numbers make no sence. draw something up or take a snap shot of the print.
you cannot start you rad and finish it at the same dia ie the two X0.686 numbers

706jim · Nov 9, 2020

On my older Fanuc radius programming cannot be used for a full circle. You would need to use i and j instead.

Delw · Nov 9, 2020

Delw said:
Are you on drugs

seriously your numbers make no sence. draw something up or take a snap shot of the print.
you cannot start you rad and finish it at the same dia ie the two X0.686 numbers

OH wait!!! Im on drugs !!!!
your talking a ball so to speak Angel should answer your question.

Numbah1 · Nov 9, 2020

I tried to split it up into 2 radi also, i still the #'s for that try. Sorry if this is straight forward, i looked at another prog here for an example b4 i asked too. I also tried 3x to turn the pic lol

Delw · Nov 9, 2020

Numbah1 said:
I tried to split it up into 2 radi also, i still the #'s for that try. Sorry if this is straight forward, i looked at another prog here for an example b4 i asked too. I also tried 3x to turn the pic lol

when I used to do them in the past, I used a full rad Toplock, never used tool comp though. it worked better that way at least for me. I alwasy had a tool comp issue doing those unless it was on the old multiseko's control from hitachi.

Numbah1 · Nov 9, 2020

This is the tool i wanted to use, but im open to suggestions. I dont think a dcmt 32 51 ; 55* diamond has the clearance for the back of the radius

SeymourDumore · Nov 9, 2020

Without knowing all the other details, here is a couple ways to finish them:

(FRONT TO BACK)
(TOP NOTCH - .031 FULL-RAD )
(DIR 8, TOOL CTR IS Z0 )
G00 G97 T101 S600 M03
G00 G42 X-0.08 Z0.1
G96 S900 M08
G01 Z0. F.004
G01 X0.5 Z0.
G03 X0.5709 Z-0.2428 R0.124
G02 X0.498 Z-0.2917 R0.051
G01 X0.498 Z-0.624
G01 G40 X1.498 Z-0.624 F.1
BLAH
BLAH
BLAH

(OR, DOING IT IN REVERSE....)
(TOP NOTCH - .031 FULL-RAD )
(DIR 8, TOOL CTR IS Z0 )
G00 G97 T101 S600 M03
G00 G41 X1.498 Z-0.624
G96 S900 M08
G01 X0.498 Z-0.624 F.01
G01 X0.498 Z-0.2917 F.004
G03 X0.5709 Z-0.2428 R0.051
G02 X0.5 Z0. R0.124
G01 X-0.08 Z0.
G01 G40 X-0.08 Z0.1
BLAH
BLAH

And yes, it's all with TNR comp, and I have no idea why you'd ever not want it that way ..... :scratchchin:

Jim

That is not a full circle, in fact not even a 180 deg circle due to the fillet on the back.
So, using the R is just fine here.

Numbah1 · Nov 9, 2020

Wow Jim, huge thanks! I under most of that - i set my t column for the tool at 8 and took the r column to 0. Ill look up tnr here shortly to try and understand further. Thanks guys

SeymourDumore · Nov 10, 2020

Numbah1 said:
Wow Jim, huge thanks! I under most of that - i set my t column for the tool at 8 and took the r column to 0. Ill look up tnr here shortly to try and understand further. Thanks guys

hmmmm .... trying to decrunch all that ...

Not Jim, it's Seymour, but that's all good.
TNR means Tool Nose Radius
Direction 8 means tool pointing to the 6'o'clock direction
Tool radius should be set to actual tool radius and not 0!

But!

Looking at the picture you've posted, I think you will need to work on the roughing first!

dieselpilot · Nov 10, 2020

The .0625" radius tool (.125" wide) can't produced that part. The inside radius blending to the shank is smaller than the tool radius. I'm note sure if the control will tell err, warn, or just cut what it can reach.

Notice the .031" rad tool in SeymourDumore's suggestion.

Numbah1 · Nov 10, 2020

Sorry Seymour! I thought you had signed Jim at bottom and didnt look at user name. Yea, i changed my rough path on the next part and it had gotten better, no under cut. I think diesel might be right, b c my switch back radius is measured .114

Numbah1 · Nov 10, 2020

I put a .077 wide radius tool in and set my rad in geometry to .039. Its alarming out out for no intersection at g41/42.
I had;
G0 z.5 m8
G0 g42 x-.08 z.1
G1 z0 f.004
G1 x.5 (odd move)
G03 x.5709 z-.2428 r.124
G02 x.498 z-.2917 r.051
G0 x1.0

I put a g41 in between the g3 & g2 in its own block and dove into the bar and left a .350 dia. Im about to go apply at burger king

SeymourDumore · Nov 10, 2020

Numbah1 said:
I put a .077 wide radius tool in and set my rad in geometry to .039. Its alarming out out for no intersection at g41/42.
I had;
G0 z.5 m8
G0 g42 x-.08 z.1
G1 z0 f.004
G1 x.5 (odd move)
G03 x.5709 z-.2428 r.124
G02 x.498 z-.2917 r.051
G0 G40 x1.0

I put a g41 in between the g3 & g2 in its own block and dove into the bar and left a .350 dia. Im about to go apply at burger king

Try that if you don't want to turn the neck.

Numbah1 · Nov 12, 2020

That worked. I used a .078 wide tool so i .039 in my r column, still used 8 then offset z -.039 i think, the offsst was yesterday. Part went out for inspection but QA was ok with it! Thanks again Seymour. Cant say i wont ask about this again but i used this incident to ask my shop for more training

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