NT4250 DSG help

[jerry13]

Running 40" parts between the 2 spindles.

Center section cut down from 4.3 to 2.875. 2.5 long x 4.0 diameter ends.

I want to rough the center section with the head1 and the bottom turret. Head 1 plunge cutting at a 20 degree angle from X4.3 Z-5.5 to X2.875 Z-7.772. Then linear feed to 19.24.

At the same time bottom turret plunge cuts from X4.3 Z-18.9 to X2.875 Z-19.22 then linear feed to Z-32.66.

Problem is I can't get the two turrets to cut independantly. Different combinations of M314/M315 and G68/G69 don't work. I can get head1 to run it's operation but not bottom turret. I get a command prompt time out alarm.

Can cycles on both programs.

[fordav11]

you may need to add waiting codes to synchronize the turrets.
usually waiting codes are M100 to M197

also possibly need other M-codes like
M303/M304 - MAIN/SUB spindle active for spindle control commands
M34 Dual synchronize spindles turning mode – Phase control C-axis chucks
M35 Dual synchronize spindles turning mode – RPM speed only
M36 Dual synchronize spindles turning mode – CANCEL

I don't know what M314/M315 is.

If you post the full program we may be able to help more.....

[fordav11]

oh wait. you are telling the machine to do balance cutting (G68) but the two process paths you want to cut are completely separate so it is not a balance cutting operation. try removing the G68 and let both programs run by themselves.
you may need to add a waiting code at the start of the cycle so they are both positioned at the start diameter and ready to go and another wait code at the end of the cycle and leave the tool at the same X position until the other head has completed then move both turrets away together.

i.e.

program 1               program 2
---------               ---------
G0 X4.3 Z-5.5           G0 X4.3 Z-18.9
M100                    M100
G71 P10 Q11 etc         G71 P10 Q11 etc
N10                     N10
......                  .......
N11                     N11
M101                    M101
G0 X300. Z300.          G0 X300. Z300.

[jerry13]

M314/315 is feed sync on and off. M303 and M35 are used.

I've tried wait codes and that didn't work.

I have been able to get head1 and turret 2 to start at same time but t2 waits at end of cut for h1 to finish that cut and both start at same time for next cut. Not reducing cycle time that way.

[fordav11]

did you remove the G68? that is the problem IMO

[jerry13]

Yes, removed G68. Still doesn't work.

[fordav11]

and M314/M315 also? No syncing is required at all except spindle rotation sync.

[jerry13]

Yes. M314 omitted.

With spindle sync only and a wait code before the canned cycle and at the end on both pgms the turrets don't even cut.

[fordav11]

ok so with both turrets working (but waiting for the cuts to finish) try writing it long hand. i.e. no cycles. does that work?

[jerry13]

Haven't tried long hand.

There are several proven programs, all with canned cycles. If I can make it work with cycles my life is easier.

I work for a large corporation with a programming dept. I can't get much help from them. The don't think the proven programs should be changed. I have been on this 9 axis Mori (my first) for 2 months and I think I know more than them. And I'm learning new **** everyday.

I miss the Integrex I ran.

[zooloader]

"I have been able to get head1 and turret 2 to start at same time but t2 waits at end of cut for h1 to finish that cut and both start at same time for next cut. Not reducing cycle time that way."

Is there an interference problem that has made you write one tool with a longer path than the other?
I would make them the same length so they start and finish at the same time.
Why can't you use a normal balance cut process?
Maybe try starting at each end and work towards the middle?