Okuma lathe retrofit servo help

Thanks for the info. I'm planning to use this for some production. starting to think that I might need to change motors. Looked at AMCs suitable servo drives and for that price I might able to get a new set of delta servos and drives. 

Then came across something very concerning. It seems like linuxcnc doesn't really like front and back tools together. Tool orientation in lathes seems just a visual representation ? (At least that what andy had said few years ago) This thing has two turrets with both front and back tools which will have different orientations. How can i deal with that. it seems like it cannot change the direction of the spindle with orientation as well. seems really limiting at that compared to linuxcnc for mills. 

Good day ,
Do you mean that the two tool turrets are on the same x axis slide ,as this system
is used on the early mazak m3,m4,and m5 lathes .
I have a mazak m3 and the The tool turret is selected and the tool selection is done in linuxcnc classic ladder.
Have you any manuals on the lathe it will probably explain the required sequence.
It looks like the tool change is hydraulic .
cheers john

Thanks for the reply. Yes both turrets are on the same x axis slide.i might be able to do that with classic ladder. Rear turret seems like it has a servo and a hydraulic lock. I'm currently searching for the manuals.

On your lathe how do you deal with front and back tooling in one program? I just came across a similar thread and they have concluded it to doing axis rotation commands. As i read industry standard for front and back tooling is to do G68,G69 commands to set the orientation. Since linuxcnc don't have g68,g69 they have proposed to remap g68 commands to g10 commands and do the same thing. (This was the first time i read it sorry if i'm mistaken or something) But there were no more posts after that.

I usually place the boring drilling and tapping tools on the back tool turret and
the turning tools on the front turret.
Also reference both turret tools to the spindle centre line as x axis zero.
cheers john

Hi. We operate a lathe with two turrets similar to your setup. Basically, we use the rear turret with negative x values. The tool orientation is still as per the manual. G2,G3,G41/42 is opposite to the normal setup on the positive side of the center line. 

Alternatively, you can issue a G10L2P1R180 before using the rear tool. This works as well. I've tested this, but not used it much.

There is also a cam postprocessor for fusion 360 that allows use of the back tool successfully.

remapping the g10 command is a nice way to go.
I haven't tested this technique on my lathe but played with a simulator.
It doesn't reverse the spindle but you could probably add that too.