Thread: Matsuura MC-760V2 overtravels in Z

I wonder if anyone here knows the procedure for this:

We bought a used Matsuura, the Z axis motor was removed to fit out the door of the seller, so the encoder position is different now.

When we tried to home out Z, it went past the ATC POSITION light, and overtravelled. It didn't do this at the sellers place.

It seems parameter #6306 is the Z grid shift parameter, which I've played with and got Z to home out,
the problem is I can't get Z to be home and the ATC position light to be on at the same time like it does on our other MC-760.

Does anyone know how to set that? I can't seem to get a call back from Methods.

Thanks

They called back

What did they say? So I won't have to call someday...

I'll second the motion to share Methods response. I've had an intermittent problem like you describe on a Matsuura 510VG for a long time.

what control?
Mike

Yasnac... I do not know offhand which model.

I'm not a tech, but recntly just had to reistall a servo drive my own a NTC vmc w Fanuc
Although there are many simularities with programming, not surre about hardware

2 things I would try
On many Fanuc controls if you have moved the axis eg power off or maintainence and you need to rezero, pushing the P and canncel buttons at powerup and holding till your screen appears, will fix the problem and restore your zero point
2nd if the servo is easy to remove, try removing again and reorient it 90 degrees, you may get lucky


you may want to confirm the elect connections to the motor wern't damaged during removal/reinstall
Mike

Originally Posted by Antarctica

What did they say? So I won't have to call someday...

Originally Posted by EDM JOE

I'll second the motion to share Methods response. I've had an intermittent problem like you describe on a Matsuura 510VG for a long time.

Sorry... It's an MX1 control, and parameter #6306 was the correct one. I kept fiddling the number until I was able to get both ATC POSITION and Z HOME LED's to come on without overtravelling. Of course they weren't coming on at the same time yet..

I homed out Z and zeroed out the position display, then jogged it in handle (.001) until the atc light came on and wrote down the difference. In my case it was .104" between where the Z home light was on home and the ATC position light coming on. You mulitply that by 25.4 and take the left 4 numbers ignoring he decimal point and add or subtract that from what's there depending on if the ATC position is up or down from Z0. I guessed to subtract and I was wrong, so I added and it worked. That was easier than thinking about it...


So if the parameter is currently set at 3824 and you have a .104" difference:

.104 X 25.4 = 2.6416

3824 + 2641 = 6465

I hope that's clear. I'm in a bit of a rush at the moment. I'll check back later.

from past experiance, although Z zero is important, your atc location will be damaging if not correct

my first vmc was purchased for a bargain price because someone had fooled with the switch location and the arm height adjustment locks were loose. It would literaly throw the tool during the swing becuse the height was off. It took a while to figure out how to readjust, but in speaking to the manufacture, he warned not to allow the toolchanger to operate unless aligned.
Since your atc/zero relationship was correct before the seller removed the motor, keep this in mind before adjusting any atc values
Mike

Good info - thanks for following up.

Brent