sable
Titanium
- Joined
- Feb 7, 2013
- Location
- midlands,UK
This is on my Beaver CNC mill ,10hp Bull DC motor ,Control Techniques Mentor II drive.
For some reason I am getting an AOC (armature over current) alarm ,almost always when the motor is slowing down (M5) from a relatively high speed ,the strange thing is that the program I am using has two opps using the same spindle speed but the problem almost always occurs on only one of the ops ,I have tried slowing it down a bit on that op which has improved things but still fine on the other op.
The top speed is 2600 rpm and the problem is 1800 to 2000 ,haven't yet tried faster but much slower is fine ,incuding tapping 200 holes at 800 rpm.
From memory full voltage is at 1000rpm then field weakening is used the rest of the way.
Is this the motor on its' way out or something else?
For some reason I am getting an AOC (armature over current) alarm ,almost always when the motor is slowing down (M5) from a relatively high speed ,the strange thing is that the program I am using has two opps using the same spindle speed but the problem almost always occurs on only one of the ops ,I have tried slowing it down a bit on that op which has improved things but still fine on the other op.
The top speed is 2600 rpm and the problem is 1800 to 2000 ,haven't yet tried faster but much slower is fine ,incuding tapping 200 holes at 800 rpm.
From memory full voltage is at 1000rpm then field weakening is used the rest of the way.
Is this the motor on its' way out or something else?