julianf
Member
- Messages
- 7,980
- Location
- devon, uk
Still battling this compressor.
The one with the bad non return valve, then bad no voltage really, then voltage drop... Now this -
So, I bought some 2.5mm arctic cable and wired direct to the pressure switch, and plugged it into the dedicated 16a c curve breaker that I run my table saw from.
Remember the compressor would start and run from a 13a extension lead, but just lost power as the load (pressure) increased.
Anyway, new supply, everything was going well. I set the pressure switch to 8 bar, and it would cycle nicely (previously would stall at 7 bar)
I got bored of watching it cycle so went to another area to use my DA sander, which u was doing for quite a while, maybe 25 mins, when it starts to loose power.
Investigation shows that the breaker has gone. I visit the compressor and the motor is hot (not proper burning, but you wouldn't want to have your hand on it for long at all).
I turn the breaker back on and try and start the compressor, but it just jerks slightly and makes a humming noise, and the breaker then goes again after some time.
Investigation -
Powered down I can spin the belt by hand fine. So nothing has seized. With no air in in the tank I can turn it over with a couple of fingers, ie no force at all really.
When the motor is powered up it always jerks a tiny bit in the correct rotation, but no further.
If I disconnect the start cap, the motor no longer jerks at all, but just hums on power up.
So the cap is certainly doing somthing.
Nothing is seized.
Motor felt pretty hot, but no sign of magic smoke, and not burning hot, but not that far off it. But it had been running my DA sander for 25 mins.
Sadly the cap has been spray painted so I have no values on it. But, again, removing it stops the unit jerking at all, so it's doing somthing.
I have no further ideas. Is it new motor time or is it even worth trying a new cap?
Thank you for persevering with this saga!
The one with the bad non return valve, then bad no voltage really, then voltage drop... Now this -
So, I bought some 2.5mm arctic cable and wired direct to the pressure switch, and plugged it into the dedicated 16a c curve breaker that I run my table saw from.
Remember the compressor would start and run from a 13a extension lead, but just lost power as the load (pressure) increased.
Anyway, new supply, everything was going well. I set the pressure switch to 8 bar, and it would cycle nicely (previously would stall at 7 bar)
I got bored of watching it cycle so went to another area to use my DA sander, which u was doing for quite a while, maybe 25 mins, when it starts to loose power.
Investigation shows that the breaker has gone. I visit the compressor and the motor is hot (not proper burning, but you wouldn't want to have your hand on it for long at all).
I turn the breaker back on and try and start the compressor, but it just jerks slightly and makes a humming noise, and the breaker then goes again after some time.
Investigation -
Powered down I can spin the belt by hand fine. So nothing has seized. With no air in in the tank I can turn it over with a couple of fingers, ie no force at all really.
When the motor is powered up it always jerks a tiny bit in the correct rotation, but no further.
If I disconnect the start cap, the motor no longer jerks at all, but just hums on power up.
So the cap is certainly doing somthing.
Nothing is seized.
Motor felt pretty hot, but no sign of magic smoke, and not burning hot, but not that far off it. But it had been running my DA sander for 25 mins.
Sadly the cap has been spray painted so I have no values on it. But, again, removing it stops the unit jerking at all, so it's doing somthing.
I have no further ideas. Is it new motor time or is it even worth trying a new cap?
Thank you for persevering with this saga!