Thursday, May 20, 2010 at 20:21
G'day. Jusy picked up one of these compressors from Aldi today. Not a real problem with it other than the pressure relief valve was sticking a little and were over inflating the tyre (
test run). Also didn't come with any spare fuses as suggest in the add. I think they could have done a little better with the relief valve. Oddly enough, I did see what appeared to be a 50A fuse which seemed to be an overkill for a DC permanent magnet motor, (just put the metal coupling against it & it sticks). I decided to clamp my ammeter on the line and ended up with the following results:
Start current around 10A to 14Amps.
Run current 0.9A to 1.0A
I just wonder whether the inline fuse is a slow blow 5A fuse and not a 50A one. Having a look @ the fuse, the eutectic point seems a little thin to me for it to be 50A fuse.
Either way the easy solution would be to replace the existing fuse with either:
- A fuse that is readily available (slow blow)(fuse & fuse holder)
- A thermal circuit breaker
- A thermal magnetic circuit breaker, (provides good short cct & overload)
- A solid state circuit breaker (similar to thermal magnetic)
Either way i intend to dispense of the inline fuse and put in its place a thermal magnetic circuit breaker if i can find one; has good short circuit and over-current protection which takes into account ambient temperatures, (dispense of fuses totally). As far as thermal cut out goes i'd most likely fit a N/C thermal switch somewhere on the case or inside the connector box if it doesn't have one. Also probably chop up the air line and put something a little better.
I wouldn't leave it in the rain as someone suggested as it has a breather hole on the top to one side i think for the motor to cool down.
Mine was covered with a little bit of plastic that quality control probably missed, (that is if they have QC), someone might want to
check theirs just in case.
Overall i don't think it's a bad little compressor for the price, i can't really complain. It has a duty cycle of 50% (30min on/off), haven't pulled it apart yet so cant comment on it's internals or its metallurgy.
I would personally rate this compressor 7/10 at the moment. Mainly because the pressure relief valve was sticking and i think they could have done a little better with the gauge even if they had to charge a little extra for it. Quality control was also another factor but to a lesser extent (i personally wouldn't rate a missing spare fuse and a bit of plastic wrap on the air vent a huge issue), otherwise i would have personally rated it a 7.5/10, for quality and price.
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