Error 9081

[mattpatt]

As the title says, I have error 9081 on the screen.

It comes up when I try to change tool.

For some background, I had a spindle oiling issue, changed some bits, and in the process unplugged a few connections up by the spindle motor.

Upon reassembly things seem to be in the right place etc, but when I try to change tool (DATC) it errors out. However, It may actually change tool once and then error out at the second attempt.

Maybe something is out of synch perhaps?

Also, If I try to orient the spindle (M119) it may do it once, but then try again and it'll error out.

Any ideas?

[denmar]

What is that spindle oiling issue? Check hall effect switches.

[alex gitzel]

I would try retuning the spindle motor.all you need to do is go to mdi and enter m84 then start and it will do it automaticaly.the spindle will run for several min.and when its done that all you need to do.you should do this anytime you work on the spindle/belts ect. not doing this can cause orientation errors so it is always a good idea to do it after service work.

[mattpatt]

Alex,

I have run M84 and everything is fine now or so it seems.

I also received info from Fadal concerning M84, and then found it in my manual.......should read those things in depth I suppose!

One thing I did notice is that as the tool pocket comes down when changing tools, it slows down a little before it's at it's final position. I've not really noticed this before and it may have been doing it for some time, but as the DATC swings in to grab the tool it wasn't quite at it's final position. In this case I have adjusted the sensor on the pneumatic pump that controls the pocket's movement so that there's a slightly longer delay before the DATC swings into action. Is this normal that the pocket slows down at the end of it's movement? When the tool pocket swings up it is quite positive with no slowing down. Air pressure is correctly adjusted (at the gauge/regulator on the back of the machine).

Can't find any mention of this in the manual, but with the adjustment I made the pocket if fully down before the tool is grabbed by the DATC, so I'm running it for now.

[Neal]

FYI-- The M84 code in the Fanuc control sycronizes the spindle hall switch and the spindle motor encoder to allow the proper timing for the computer to see both items at the correct time. BA spindle belt that elongated from use can throw this timing out. One other possiblity that can give the 9081 error is thespindle hall switch itself.
Glad to hear all is well now!

Neal

[alex gitzel]

there are two air valves up by the datc in the back where the datc attaches to the machine.these operate the tool bucket up/down you may have dirt or water effecting one of them.the down valve may have reduced flow or the up one may not be letting all the air out when off and the other has trouble over powering it.you should clean these out or try a drop or two of air tool oil to lube them up.if there is water in the system they like to get stuck after awhile.you can swap these with the ones on the other 5 valve stack for testing.

[Neal]

Alex--
Review the Fanuc manual on 9081 alarm. I do not believe it has anything to do with the tool changer.

Neal

[alex gitzel]

neal, the manual says( ''the one-rotaion signal of the motor cannot be correctly detected'')the alarm is listed as '' spn_n_: 1 rot. motor sensor '' this sounds like the orientation sensor tuning to me.and the m84 should correct it.if i am not correct on this please let me know.

[mattpatt]

Thanks for all the info.

I will try cleaning the valves for the DATC

[Neal]

Alex--
You are correct. The issue most likely is the sync between the motor rev sensor (Fanucese for Encoder) and the spindle magnet hall switch. Usually its just the belt has stretched and knocked the timing out and M84 resets it.

Neal

[mattpatt]

problem sorted.

I twiddled with the valves to adjust the 'brake' as the pocket drops down to it's tool change position.

Thanks for all your help

[mattpatt]

Hi Guys,

Seems that this problem is sneaking back to haunt me.

Had a noisy belt, so just changed that.

Try to rum M84 to synch everything up and it errors:

1174 M84 LOGR ARBITRARY DATA ERROR

If I try to orient the spindle it errors:

9081 SPN 1 :S-SPINDLE ERROR (AL-081)

I'm gonna have a search for info now, but hoped that maybe someone has some words of widsom.

Possibly the hall effect switch?

Cheers,

Matt.