Philabuster
Diamond
- Joined
- Jul 12, 2006
- Location
- Tempe, AZ
My Friend bought a 1988 QT 10N atc/mc two years ago and it has sat in his garage without power since then. Well, he finally got some cash together to get it running. He is running it on a Kay 20hp Phase Converter.
We replaced the Nicad batteries and reloaded the parameters. We cannot get the milling spindle alarm (205) to clear. This model uses the main Freqrol spindle drive to also drive the mill spindle. I have an older 1986 10N atc/mc at work that has a separate milling spindle drive. I am very familiar with the machine, but running a CNC on a RPC is new to me.
I suspect the RPC voltage may be the problem. The machine had no issues and tested fine before purchase. There are a couple parameters that it will not take, but my machine at work has the same exact issue with those parameters (A20) and it runs fine.
Anyway, as we all know, the generated leg from the RPC is reading a bit high. The machine has an intergral 3Ø transformer to adjust virtually any standard voltage. The machine is tapped for 240V and ideally, the output to the machine should be 210V as stated on the transformer. We disconnected a few run capacitors in an attempt to reduce no-load voltage.
Input line voltage is 233V, 239V, 257V.
Out from the transformer 229V, 211V, 234V.
Electrician from work suggested running another motor on the same circuit to help balance the voltage. Output from transformer with engine lathe running in high gear:
224V, 212V, 231V.
Is it time for a few buck transformers? I wish he could just buy a PP and be done with it.
We read that many people have had good luck running older Mazaks on RPCs. However, I am also nervous about the RPC not being able to sink regenerated power from the Freqrol.
I have searched and searched on this and <cough> other forums. I cannot find anything close to the issue with the milling spindle error.
Your help is appreciated.
We replaced the Nicad batteries and reloaded the parameters. We cannot get the milling spindle alarm (205) to clear. This model uses the main Freqrol spindle drive to also drive the mill spindle. I have an older 1986 10N atc/mc at work that has a separate milling spindle drive. I am very familiar with the machine, but running a CNC on a RPC is new to me.
I suspect the RPC voltage may be the problem. The machine had no issues and tested fine before purchase. There are a couple parameters that it will not take, but my machine at work has the same exact issue with those parameters (A20) and it runs fine.
Anyway, as we all know, the generated leg from the RPC is reading a bit high. The machine has an intergral 3Ø transformer to adjust virtually any standard voltage. The machine is tapped for 240V and ideally, the output to the machine should be 210V as stated on the transformer. We disconnected a few run capacitors in an attempt to reduce no-load voltage.
Input line voltage is 233V, 239V, 257V.
Out from the transformer 229V, 211V, 234V.
Electrician from work suggested running another motor on the same circuit to help balance the voltage. Output from transformer with engine lathe running in high gear:
224V, 212V, 231V.
Is it time for a few buck transformers? I wish he could just buy a PP and be done with it.
We read that many people have had good luck running older Mazaks on RPCs. However, I am also nervous about the RPC not being able to sink regenerated power from the Freqrol.
I have searched and searched on this and <cough> other forums. I cannot find anything close to the issue with the milling spindle error.
Your help is appreciated.