Hello,
I started working on a machine today for a customer, they just wanted some help with programming, and it has a few problems and I was hoping somebody might be able to help or give some ideas of things to check.
The controller says it is a GE Fanuc Series 15-M. I think the machine is from the early 90's, and it wasn't any brand I recognized. It has two spindles. On one of the spindles we keep getting "SV 001 Z Excess Current In Servo". Sometimes it doe it while it's just sitting there, other times while cutting. When you home the machine there is a metal-on-metal sounding squeaking noise.
When the X axis is homing there is an "Floating Soft Limit Tripped", but it doesn't seem to effect anything.
The biggest problem is that there doesn't seem to be any torque. They have a 12" face mill on the one spindle, and I was down to trying 1/16 depth of cut and it would still alarm out and have over 100% spindle load, even down at 10 IPM and 550 RPM( I know the RPM's is fast, but they wanted to run it there hoping to move up in the torque curve). It is supposed to have 60 horsepower. And, if I hit feed hold while it was facing, it would basically just keep cutting, seems like it was gradually pushing into the part, like the machine couldn't hold the Z posistion. One pass at the same Z left big gouges in the face. I think it is something mechanical, has anyone seen anything like this before? I suggested checking the belt, and backlash in the screw for starters.
The customer is going to work on getting a Fanuc tech out there to figure out the alarms, and he has to figure out the machine problems - but does anyone have any suggestions for things to start checking?
I started working on a machine today for a customer, they just wanted some help with programming, and it has a few problems and I was hoping somebody might be able to help or give some ideas of things to check.
The controller says it is a GE Fanuc Series 15-M. I think the machine is from the early 90's, and it wasn't any brand I recognized. It has two spindles. On one of the spindles we keep getting "SV 001 Z Excess Current In Servo". Sometimes it doe it while it's just sitting there, other times while cutting. When you home the machine there is a metal-on-metal sounding squeaking noise.
When the X axis is homing there is an "Floating Soft Limit Tripped", but it doesn't seem to effect anything.
The biggest problem is that there doesn't seem to be any torque. They have a 12" face mill on the one spindle, and I was down to trying 1/16 depth of cut and it would still alarm out and have over 100% spindle load, even down at 10 IPM and 550 RPM( I know the RPM's is fast, but they wanted to run it there hoping to move up in the torque curve). It is supposed to have 60 horsepower. And, if I hit feed hold while it was facing, it would basically just keep cutting, seems like it was gradually pushing into the part, like the machine couldn't hold the Z posistion. One pass at the same Z left big gouges in the face. I think it is something mechanical, has anyone seen anything like this before? I suggested checking the belt, and backlash in the screw for starters.
The customer is going to work on getting a Fanuc tech out there to figure out the alarms, and he has to figure out the machine problems - but does anyone have any suggestions for things to start checking?