Why didn't you make the lid a cup to hold all the short bits?
An emergency button
Hopefully it's the last time I will deal unsafely with live 220Vac voltages...
Just remember those contacts in there are not rated for continuous operation at 10A, and also they are not fail safe when disconnecting into a high current. They tend to weld together under heavy load, so best used in conjunction with a sensitive 16A AC1 rated contactor. Those at least will, when paired with the appropriate overload, provide good protection. Hope you also got some LED power on indicators to go with them.The contactor should not be operated correctly, it is a safety button with locking, these buttons are used to control the circuit breaker trip coil - the most reliable disconnection - - the coil acts on the circuit breaker locking mechanismCorrect, these emergency stop buttons are only rated for the coil current only and should never ever be used as a means of breaking the mains power supply directly, only via a suitably rated contactor
An emergency button
Hopefully it's the last time I will deal unsafely with live 220Vac voltages...
Just remember those contacts in there are not rated for continuous operation at 10A, and also they are not fail safe when disconnecting into a high current. They tend to weld together under heavy load, so best used in conjunction with a sensitive 16A AC1 rated contactor. Those at least will, when paired with the appropriate overload, provide good protection. Hope you also got some LED power on indicators to go with them.The contactor should not be operated correctly, it is a safety button with locking, these buttons are used to control the circuit breaker trip coil - the most reliable disconnection - - the coil acts on the circuit breaker locking mechanismCorrect, these emergency stop buttons are only rated for the coil current only and should never ever be used as a means of breaking the mains power supply directly, only via a suitably rated contactor
I know this is a week ago but a pair of very similar ones arrived in the mail today. Quick non destructive teardown for information. Allegedly 15A rated Maybe 3A would be closer and even then ? This pair is going on my CNC via a properly rated relay to the power supply/vfd.
It is in this case it is a contactor I salvaged out of a coffee machine they are designed to cycle 20-30 times an hour for years. Contacts unknown but it is a 3phase one so it should do fine.
It is in this case it is a contactor I salvaged out of a coffee machine they are designed to cycle 20-30 times an hour for years. Contacts unknown but it is a 3phase one so it should do fine.
The thing that comes to mind with that is, isn't a coffee maker typically pretty much a purely resistive load? It's likely not an issue, but might be something to consider. What sort of load will the CNC machine present - something more inductive and potentially arcy-sparky?
-Pat
Power Supply and a VFD on the Head so no harsh on/off and under 3kW total (<15A).
Espresso machines are hard on or off and the contacts are 20A rated each x 3 so cruising in this case. I have never seen one of these fail in a modern machine and some are 7.5kW+ running the same contactor in a lot of cases.
This is a magnetic ferrite core memory plane.
("Plane" seems to be the correct term for this.)
I purchased this on ebay from the Russian Federation for $35 including shipping. The shipping time from Russia to the USA was about one week. I didn't have 100% confidance that it would arrive, but it did.
This magnetic core memory plane was made in the USSR in 1970s.
It is a 32x32 core memory plane that stores 1024 bits (128 bytes) of data.
The plane outside dimensions are 4.4" x 4.4".
This plane is one of 20 planes forming a magnetic core memory block. The capacity of the whole block is 2560 bytes.
Yup, they make a nice decoration when framed. Here's mine, probably from the same seller, that I bought a few years ago.
McBryce.