Z Travel Parameters on a 88 HS control

[Mark Skinner]

We have an old Fadal VMC-15 with a 88 HS controller at my school. Some how the parameters got erased and set back to the defaults which are incorrect. We got them all reset except now the Z axis will only move to +4.0 which is bad since we need at least +5.5 inches to clear for a tool change.

I've checked SETP and have everything set to what it should be. I know the spindle can travel further + in Z. I moved to +4.0, set that with SETZ, ran a cold start then could Z+ another 3.25 inches before I hit the emergency stop. I've spent a few hours reading Fadal manuals but I can't really find how to change the parameters of the Z axis. All I found was Survey, SV, but it didn't really explain what was going on with that parameter.

Anyone know whats going on?

[txcncman]

When you are executing Cold Start, does the machine go to the Z location mark?

[Mark Skinner]

Right after we power it up...we have the CS position marked with brackets. The alignment with the turret is correct. The max + in Z is off so a parameter is stopping the spindle from moving up high enough to clear the tools when we tool change.

[txcncman]

I went through something similar not that long ago. But for the life of me, I cannot remember the actual setting to change. I would know it if I see it. But I am not working with any Fadal machines at the moment, so can't go look. If you call Fadal (MAG), they can talk you though it. If you do not have them, you can get manuals at: FADAL MACHINE DOCUMENTATION

[txcncman]

What does the Survey for the Z axis show?

[Mark Skinner]

I've been digging through the manual as best as possible...i think I'll just have to keep searching.

Thanks for the tips TX!

[Mark Skinner]

The survey for Z is blank now. There is an offset slot and I've tried entering +2 and -2 to see if that would off set the travel. It didn't work. I also tried entering integers in each of the 20 slots to try and manually redefine Z, also didn't work. As my teachers told me...'"we're really getting into the weeds"

We're using x20, y16, z20 in the travel section of SETP. I've also tried using x20, y16, z28 in SETP...didn't work

[txcncman]

I am probably thinking of the wrong screen. Make that phone call.

[Techman]

I think I would be suspicious of the cold start location. The machine shouldn't need more than Z+ 4. for a tool change. Is it possible that the Z zero was set above the Z cold start position?
Techman