Hi, first let me say thanks for this great site. the reference section is fantastic.
I bought a 12" thickness planer and it has a 2hp induction motor that has trouble starting. The motor was probably made in the 50s.
The motor is an English Brooks Motors Ltd single phase R8-A64505 capacitor start, 230v, 1430rpm 50Hz. The hp rating says 1hp but I think its possibly 2.1hp. On the motors plate I can just about make out what could be a 2 before the 1. In addition the FLA is 6.1 which I think would mean it has to be about 2hp. I am not 100% sure as this is old and the motor is physically large, 12" diameter.
It looks like this motor
, although that's an R9 model.
If i can get it up to speed (no load) and then pull the belt tight it works fine. But if i try to start it with the planer head attached, it never gets up to speed. The planer head is well lubed.
Capacitor:
It takes about 5 seconds to start with no load other that its 10" pulley. It originally had a 30uf start capacitor. I did abit of searching and found that 200uf was about right for a 2hp motor so I ordered one and a 100uf which I tried first, because I thought the kick, might tip the planer over. Well even with 300uf (paralleled capacitors) it still takes 5 seconds to start.
Wiring:
So next I checked the wiring, all seems to be ok. All VIR wire, (50s stuff), a bit perished, but the run winding is permanently connected and the start winding is connected to the capacitor and centrifugal switch. Am I right in thinking that the order positive--switch--run-winding---capacitor---negative is irreverent? The wires looked factory anyway.
Bearings:
I have greased one bearing through the ?cup? No grease nipple just a brass cap that you unscrew. If you have ever seen a brooks motor you know what I mean. It was filled with grease, so I added new. Perhaps its supposed to be oil. Anyway greased, stated, and the internal fan through the excess grease out and onto my chin. I called it a day.
If I spin the motor by hand, it doesn't feel stiff, but at the same time its not spinning like a hard drive motor. The rotor is heavy. When its up to speed and you turn it off it takes ages to stop, so the bearing must be fairly good.
Anyone have any ideas of what else it could be? Is a UK 13A socket too little for the in-rush current?
Any help appreciated.
Andrew
I bought a 12" thickness planer and it has a 2hp induction motor that has trouble starting. The motor was probably made in the 50s.
The motor is an English Brooks Motors Ltd single phase R8-A64505 capacitor start, 230v, 1430rpm 50Hz. The hp rating says 1hp but I think its possibly 2.1hp. On the motors plate I can just about make out what could be a 2 before the 1. In addition the FLA is 6.1 which I think would mean it has to be about 2hp. I am not 100% sure as this is old and the motor is physically large, 12" diameter.
It looks like this motor
If i can get it up to speed (no load) and then pull the belt tight it works fine. But if i try to start it with the planer head attached, it never gets up to speed. The planer head is well lubed.
Capacitor:
It takes about 5 seconds to start with no load other that its 10" pulley. It originally had a 30uf start capacitor. I did abit of searching and found that 200uf was about right for a 2hp motor so I ordered one and a 100uf which I tried first, because I thought the kick, might tip the planer over. Well even with 300uf (paralleled capacitors) it still takes 5 seconds to start.
Wiring:
So next I checked the wiring, all seems to be ok. All VIR wire, (50s stuff), a bit perished, but the run winding is permanently connected and the start winding is connected to the capacitor and centrifugal switch. Am I right in thinking that the order positive--switch--run-winding---capacitor---negative is irreverent? The wires looked factory anyway.
Bearings:
I have greased one bearing through the ?cup? No grease nipple just a brass cap that you unscrew. If you have ever seen a brooks motor you know what I mean. It was filled with grease, so I added new. Perhaps its supposed to be oil. Anyway greased, stated, and the internal fan through the excess grease out and onto my chin. I called it a day.
If I spin the motor by hand, it doesn't feel stiff, but at the same time its not spinning like a hard drive motor. The rotor is heavy. When its up to speed and you turn it off it takes ages to stop, so the bearing must be fairly good.
Anyone have any ideas of what else it could be? Is a UK 13A socket too little for the in-rush current?
Any help appreciated.
Andrew