npolanosky
Cast Iron
- Joined
- Apr 9, 2016
- Location
- USA, FL
Hi there,
Working my way through repairing a used KIA SKT21LMS I picked up. Got a 3ph generator for doing some troubleshooting while I wait for my shop to be ready for move-in.
The machine is a 2003 with a Fanuc 0i-TB
I've worked through a bunch of alarms and after fixing a lot of little things now I'm back to the original issue the machine was purchased with- The B axis (Subspindle linear) won't move, and because the sub isn't at home I can't do anything else.
The servo amp for the B is giving an alarm 436 "Soft Thermal (OVC) when I press standby and enable the axes. This is one of two things, as far as I can tell-
(A): The servo amp or motor is bad
(B): The axis is bound up.
I am thinking the latter- I cannot turn the ballscrew by hand with the machine powered off, whereas I can move Z by hand. There isn't a brake on the motor, so unless there's a brake elsewhere in the system I think something is stuck. The machine has been sitting for a few years, and they had this problem before they sold it to me and simply opted not to fix it since this was their oldest machine and it had already by superseded by newer ones.
What would cause the axis to completely bind up? I don't see any obvious damage to the linear rails or ballscrew, and the rest of the machine looks good aside from the typical peeling paint and rust from age and use (~30,000hrs on time, 12000hrs cut time).
I have hydraulic pressure, plenty of way oil, the B servo definitely sounds like it's being energized.
Working my way through repairing a used KIA SKT21LMS I picked up. Got a 3ph generator for doing some troubleshooting while I wait for my shop to be ready for move-in.
The machine is a 2003 with a Fanuc 0i-TB
I've worked through a bunch of alarms and after fixing a lot of little things now I'm back to the original issue the machine was purchased with- The B axis (Subspindle linear) won't move, and because the sub isn't at home I can't do anything else.
The servo amp for the B is giving an alarm 436 "Soft Thermal (OVC) when I press standby and enable the axes. This is one of two things, as far as I can tell-
(A): The servo amp or motor is bad
(B): The axis is bound up.
I am thinking the latter- I cannot turn the ballscrew by hand with the machine powered off, whereas I can move Z by hand. There isn't a brake on the motor, so unless there's a brake elsewhere in the system I think something is stuck. The machine has been sitting for a few years, and they had this problem before they sold it to me and simply opted not to fix it since this was their oldest machine and it had already by superseded by newer ones.
What would cause the axis to completely bind up? I don't see any obvious damage to the linear rails or ballscrew, and the rest of the machine looks good aside from the typical peeling paint and rust from age and use (~30,000hrs on time, 12000hrs cut time).
I have hydraulic pressure, plenty of way oil, the B servo definitely sounds like it's being energized.