[okuma1984]

Hi there I have an Okuma CNC lathe from 1980s and I don't know how to extend the tailstock on it. I can manually move the entire tailstock but can't extend/advance the tail stock
can anyone give me some suggestions please? here is a picture of the machine.

[Superman]

Looks like an older LB15 or 25 ?
probably OSP5020L control ?

G & M codes for that era .... so try....
M55 = Quill Retract
M56 = Quill Advance

got this from an OSP 7000L book, also shows the same codes for a P300 control

[okuma1984]

true but the pedals are supposed to work and they are not working you dig?

[Technical Ted]

There's a screen where you can set it to use the tail stock. It's the same screen that you set ID or OD chucking. I can't remember if it's under settings or parameters. If you can't find it then I can send you more info when I'm at work tomorrow morning.

[okuma1984]

There's a screen where you can set it to use the tail stock. It's the same screen that you set ID or OD chucking. I can't remember if it's under settings or parameters. If you can't find it then I can send you more info when I'm at work tomorrow morning.

ok thanks I think you're referring to chuck work?? that should be on "1"?

[Superman]

Maybe a broken wire to the pedals....
use the check data page to see if the pedal press is being acknowledged.

[Technical Ted]

ok thanks I think you're referring to chuck work?? that should be on "1"?

That is correct. If it still doesn't work then go to the back of the machine & turn up the tail stock pressure. There's times on our LB 15 that we have to give the tail stock a good whack before the quill will extend. Let us know how you make out.

[okuma1984]

That is correct. If it still doesn't work then go to the back of the machine & turn up the tail stock pressure. There's times on our LB 15 that we have to give the tail stock a good whack before the quill will extend. Let us know how you make out.

you are absolutely correct thanks a lot the chuck pressure was too low.

[okuma1984]

That is correct. If it still doesn't work then go to the back of the machine & turn up the tail stock pressure. There's times on our LB 15 that we have to give the tail stock a good whack before the quill will extend. Let us know how you make out.

how you doing, genius
got a problem and hopefully you have a solution for me?

I noticed I couldn't turn on the spindle anymore (I could single jog it) but I had to turn off what I originally turned on to advance the tail stock eh?

so what's the deal with this machine? how does this work?? tail stock has to be off before the spindle can start spinning?

[deadlykitten]

hy

I had to turn off what I originally turned on to advance the tail stock eh?

moving the tailstock requires 0 rpm and turret at upper limit (XA+soft limit); both conditions may be ignored by an optional intelock, if available for your machine

tail stock has to be off before the spindle can start spinning

try M157 ( also optional maybe ) ... i don't have experience with your machine, so i can't give you exact infos / kindly

[okuma1984]

hy



moving the tailstock requires 0 rpm and turret at upper limit (XA+soft limit); both conditions may be ignored by an optional intelock, if available for your machine



try M157 ( also optional maybe ) ... i don't have experience with your machine, so i can't give you exact infos / kindly

yeah

your input was not recognized

what are you talking about

[Technical Ted]

Once the tailstock is activated it has to used (advanced) to run a program. Kind of like trying to run a program without a part in the chuck. As Deadly mentioned there are M codes that can be used to get around that. You would need to use those codes if you wanted to center drill a part & then use the tailstock.
M156 - Center work interlock off
M157 - Center work interlock on
M55 - Tailstock retract
M56 - Tailstock advance

[okuma1984]

Once the tailstock is activated it has to used (advanced) ..

sorry it has to what?

[Superman]

sorry it has to what?

if you activate the tailstock
... it has to have the advanced acknowedge limit switch conformed (or made) before you can run in full auto.

[Technical Ted]

sorry it has to what?

it has to be used

[okuma1984]

got it

thanks