wire question

[Fred from Université de Sherbrooke]

Just curious to know what (wire users)you use for coordinate systems (G54 or G92) with a Fanuc Wire.

[Guest]

most defintely use the G92. AND i would also store my initial g92 as a measure point in the machine g77 p1. in a wire break the wire goes back to the last g92 to repair itsself and retrace. hth

[htm01]

G92 here too

[Fred from Université de Sherbrooke]

Ok thank's

 

Why don't you use G54 to define your work offset the use G92 for positionning?

[Formax]

We use G54 and G55 as work coordinate and use G92

for positioning

[Guest]

can someone explain the use of the g 54. i am not familiar with it.

[Formax]

We do a lot of dovetail tooling and we set work coordinates off the dovetail and save as G54 and

are dovetails ar in a fixture so we dont have to set are work coordinates every time.

[Guest]

if i understand you correctly i think i do the same thing in a way.i can store machine coordinate positions in the machine and never lose that positioning and can have unlimited pts saved.in the fanuc wires it saves it under codes g77 p1 etc.

[Formax]

yes, i think it's the same way.

[Fred from Université de Sherbrooke]

That's exactly what I wanted to hear. Are you using a Fanuc? So tell me if I'm correct:

We call G54 at start of program, then for other positions, move to that position (G00) then output a G92 (on a separate line) and cut the feature.

[Formax]

yes here is a example for our first cut.

O1000 (T1001)

(FANUC OI10C/02-27-08)

 

G90

M31

G54 G00 X-.65 Y.525 I1. J0.

G92

M60

M37

S331 D331

G41 G01 X-.54

X-.5

Y.88878

X-.49508 Y1.1701

X-.49426 Y1.2173

X-.4895 Y1.49

X-.47933 Y1.5

X-.35933

Y1.4902

X-.18018 Y1.3552

X-.03633

X.01789 Y1.3239

X.38537

X.41667 Y1.3552

X.54167

X.55167 Y1.3452

Y1.1701

X.60652 Y.9654

X1.55276 Y.535

X1.67776

G40 Y.545

[Guest]

correct me if im wrong guys, but isnt it possible you could lose that position somehow.say in a power outage,wrong input of abs. coordinates etc.

[Formax]

im not sure, we have lost power before and everything was okay.

[Guest]

what if in your program there was a mistake in a rapid move and the next g92 reset your xy abs. would you still be able to go back to the g54 and that position still be correct?

[htm01]

G54 would be from machine "0" not program

[Formax]

i think the g54 position would still be correct

(but i could be wrong ) the only time i had to reset g54 is when the fixture got bumped.I am still learning about that machine i dont get to run it very often just programming in mx.

[Guest]

quote:

---

G54 would be from machine "0" not program

---

i see now. its basically the same thing as the measure ponts i was talking about. thats just how i was trained in school on the fanuc wires by using the G77 P1 codes.

[Matt Berube at Ferron Mold]

I'm with Del. I just do it the way they did at Methods Machine Tools training course.