Fanuc 6m tool change

[joe m]

I have a Hitachi Seiki with a Fanuc 6m.

We had a horrid noise coming from the Z axis. Turned out to the bearing on the end of the Z axis servo. We replaced it put everything back together and the noise is fixed but the machine will not tool change. It references fine and every other function seems OK. Do we need to "reset" some setting in the control?

[Hardmill]

I could be wrong but you probably need to reset your

limit switch.

 

Brendan where are you??

 

PEACE

[joe m]

tool change height has always been the same as the referance point, on the soft limit, this height still shows the same on the readout.

[Hardmill]

If you removed you encoder when you changed bearings

Im sure this will be you problem.

It been awhile for me but I believe this is it.

 

:thinking:

 

 

PEACE

[Tom Dorgan from American Precision]

There should be some Z setting for tool change height. If it is no longer aligned with the carousel it won't work.

[joe m]

it is aligned with the tool change arm, but on the position desplay page the relative for z is 19.0880 and the absolute is 61.8572. I think this is my problem. how can I reset the sbsolut?

[jeff]

The absolute position wont matter, its the MACHINE position that matters.

Can you home out Z axis?

[joe m]

Yes, Z axis homes out fine. Machine postion shows zero 00.000 when on the soft limit switch, also the tool change height.

[Hardmill]

As stated above the machine position is your only concern.

And yes your machine will zero return, and your screen

will read 0.0. But any time you remove an encoder you do

need to reset your limit switch. Dumb as it may sound

a little bump may do the trick. I should have said

almost always.

 

PEACE

[crazy^millman]

what does the parameter page say when you go to maintence mode. I can not remember if the 6 had a display for the encoder or not but think you might have to go here to get it fixed. I would call Fanuc and ask them to give you a fax that explains what to do in this situation. I will aks around teh shop tommorrow and see if anyone knows what to do.

[chris m]

You might need to do a grid shift so that the machine thinks it is back in the same spot that it was before OR you may need to change a parameter where the machine stores an encoder postion [ie Z692.7894 instead of Z0] that it thinks is the toolchanger position

 

C

[joe m]

I just adjusted the limit switch about a 1/64" and it works fine. Thanks everyone for the input.

[Hardmill]

WOO HOO!!!

Great to hear

 

PEACE