G12.1 & G68.5 on HD2

Hi guys,

I tried to mill something on HD2 in G12.1 mode. I used G68.5 to translate the coordinate system accordingly (G68.5 X0 Y0 Z0 I0 J0 K1 R180.). After that X+ and Z+ become X- and Z-.

G12.1 then tried to mill below center which of course won't work. Is there a way to get G12.1 work above center (which would be in X- due to the translated coordinate sys via G68.5)?

Thanks

PS In the end I just did it without G68.5

The machine is a Integrex Matrix

I had the idea to mirror the X axis with G50.1 but it gave me an error message (something like Miss Set G-Code); Well I assume G50.1 is not available on the lathe; Does somebody know something about that?

Show me the beginning of your program.

G17 XY??

If i'm not mistaking it should be

G0C180.(at some angle)
G17UH
G12.1
And then you could also activate the diamter inputs if you want(G123.1 is off)
G122.1

lolz i hope i wroted correctly...

MM

I have G17 UV in the prg;

I will post the prg when I get back on the machine next week;

I was playing around a bit today again with his G12.1 and G68.5 (milling on 2HD) and something strange happened;

The prg (EIA) looks fine on the graphics but when I actually tried to run it it overloaded the x-axis (or so); It was like it was accelerating like crazy (although the rapid feed overwrite was set to 1%!!!) and then hit the breaks immediately!?!?

It really sounded bad and I thought something broke; After this I couldn't move any axis anymore and they seemed to be in a state like before you home it and I had to restart the machine to get it going again; Well I tried to run the prg again and it happened again; I'm now about it let it go as I don't want to break something;

There wasn't even an alarm message at all after this!?!? Has that ever has happened to somebody of you before? I think this must be another software glitch;

Well if somebody could post a working example for milling on HD2 in G12.1 and with active G68.5 that would be cool;

PS I will get that vicious prg on stick and post it here maybe you guys have a clue what I'm doing wrong

Need to see the program. Put a comment in were it over loads.

I never use 68.5 with G12.1 on sub spindle, in fact I never use 68.5 on main either. Not sure its possible, check the manual.

Well I found out what I did wrong; I tried to use G122.1 together with G12.1 which is not supported by G12.1. This apparently made the machine behave unexpectedly (well I would expect that the machine's software would issue an error message in such cases but it didn't).

And yes you can use G68.5 and G12.1 together on the sub-spindle (this is what I'm doing now).

fooo.......could you please show an example of how you used the G68.5 & 12.1 together on the sub spindle. When we tried it, it gave us problems and Mazak said to get rid of G68.5???
12.1 works without the G68.5 but cutter comp is backwards?

Hmm I only did a quick dry run and it seemed to work (as we had already setup the program without G68.5 and were using it).

The problem was that when we tried to use G12.1 and G68.5 together on the sub-spindle the milling head always wanted to mill below centerline which of course won't work. After taking out G122.1 it seemed to work.

Well we didn't use cutter compensation so I can't say much about that. If I find the time I might try it and see what we get.

There was nothing special in the program though. It was setup like any regular G12.1 program for the main spindle.

Well if you don' properly translate the coordinate system via G68.5 for milling on HD2 then everything will appear mirrowed on the subspindle which you should be able to see on the graphics (select xy-xz-xy I think)