[gunda]

Hi guys

Do you know a way of moving parametrically the turning center position on a Multus B400 machine? Basically controlling the Y axis coordinate for turning position in program itself

[budgieW]

What are you trying to do? Can you use G0 Y=V100?

[gunda]

Well, if a turning tool is leaving a mark when facing right at the center of rotation I would like to parametrically move the Y axis turning position and return it to it's old value after the operation is complete.
It works ok on LB lathe equipped with an Y axis if you just enter values for VZSHY or VZOFY and then revert to the old one.

[budgieW]

That will still work on a multus VZSHY or VZOFY are still valid you can return to the turning position with G0 Y0 or G0 Y=VYSTP

[gunda]

Thanks Budgie. I know VZSHY and VZOFY are valid, but they don't tend to cause any movement in Y axis direction. On the lathe I could see actual movement but on the Multus it doesn't move at all from it's center coordinate which is set in the parameters... I don't know how to get access to this particular one using a parameter code in program

[Riddersholm]

Unless you know what you are doing which you are not since you are asking, don't touch it. Get your Okuma service tech to come and do that

[gunda]

Thanks Riddersholm
I don't think this is the idea of a forum discussion, otherwise everybody would call service rather than spending time here. If I could have called service I would and if you are willing to be helpful you can call Okuma service, otherwise there's absolutely no need of your comment.

[Riddersholm]

Check your inbox

[budgieW]

VZSHY is Y-axis origin shift
VZOFY is Y-axis zero offset

As the Multus has a compound Y axis I do not think you can use these as they would be a combination of X and Y, I could be wrong as it has been a while since I used a Multus, you will need to check it on the machine in MDI to be sure, You may need to use the tool number, something like Y=VTOFY[8] or you may need to have an X move as well due to the soft limit

Can you just use the a simple Y axis move?
G0 Y=V100

and to return to the zero point
G0 Y=V100*-1

[gunda]

I think it locks the Y axis at the turning coordinate so I can't achieve it this way. Unless there is a parameter allowing the lock at turning position to be avoided, which I have to seek in the manual

[budgieW]

Y axis turning function is an extra. I think that you will need this option to move the Y axis for turning. I could be wrong though. You can test it in MDI G0 Y20 with the C axis and the Y axis off

[gunda]

I managed to turn Y axis on with G138 and do turning operations but I have all X coordinates in radial. Do you know a way to turn the Y axis off without returning to turning position?

[Riddersholm]

You can not turn off the Y axis when it is not at its zero position with out changing the parameters.

[cncDecoder]

You should be able to do a G0 Y_ value positioning when not in Y-axis mode.
I use it all the time with "twin" turning tools (CNMG and DNMG in the same tool, for this I use a Y-20.00 mm offset).
It is even accessible in the IGF tool page of an operation unit.

If your turning position is off, due to Y-axis being out, then you will need to go thru clocking your test bar and setting X&Y zero sets and then adjusting your Y axis turning position parameter until the YI and YS offset are equal. The Multus machines are quite weak and easy to knock out of calibration.


Sent from my iPad using Tapatalk

[OKUMA85]

This code is for LB3000II EX MY
i use this for offset y in turning mode

...
G50 S2000
G136
G0 T101 X100 Y10 Z20 G95 S300 M4 M8 M63
G1 Z-20 F.1
G0 Y=VYSTP
G0 X800 Z800 M5 M9 M63
G0 T202 X100 Y0 Z20 G95 S300 M4 M8 M63
...