Re: brushed dc servo axis motor, needs cleaning?
One of the reasons some say you should not dismantle a PM field motor is that you will get demagnetization of the field, unless a metal 'keeper' is slid in to replace the armature.
I have only seen this happen on steppers, with the PM DC servo's I have taken apart and cleaned, I have not found any problem along these lines.
You have to be very careful when removing the armature not to fracture the PM, due to sudden attraction of the armature when free of the bearings.
For some time now, Rare Earth magnets have been used that do not seem to suffer from this phenomenon as easily.
At the very least, blow the motors out and check brush length.
Al.
CNC, Mechatronics Integration and Custom Machine Design
“Logic will get you from A to B. Imagination will take you everywhere.”
Albert E.