Hello Induction Brass Annealer Redux community! I'm stuck. I'll try to make this as simple as possible. I have read all 149 pages of this thread (seriously). I am humbled by the machines people are making, I am also very grateful everyone is taking the time to share.
I built a GinaErik (not to spec). I didn't follow the recipe because I didn't know the recipe when I started.
I have:
RSP-750-48
Ocestore 1000W ZVS Induction Heating Board
DROK DC 4.5-100V Digital Voltmeter Ammeter Multimeter Panel
Pemenol LCD Digital Timer Relay 12V 24V Controller Board
Self made coil 1/8 OD copper tube coil (1.125in ID) connected to 1/4 ID copper tube (soldered)
12 gauge stranded wire for the 48V power supply
12V 3amp DC power supply for peripherals
DC cooling fans
DC water pump with radiator
The main way my unit differs is the the timer relay (forget about the other thing I've done because I'm afraid I'll get flamed however it should bear no difference in this discussion). I am using a 12 volt power supply to switch the RSP-750 current on and off via a relay. I have tried a few different switches; TWTADE SSR-40 DD 40A solid state relay (didn't work), a manual switch rated for 120V 20amp AC power, and a Standard Ignition 70amp multi-purpose relay (12 volt, 70amp). Because this is a single pole switch I am not using a varistor (I know, I know....). This could be the source of my problem, please read on.
My machine currently works (sort of). It takes 11 seconds to produce enough heat in the brass for annealing (probably not truly annealed). If I select a longer time, the power supply trips (at 9.5 amps, resettable). The RSP-750 has the voltage selected to the lowest setting because anything higher than that voltage causes the power supply to trip sooner and the brass is no more annealed (I can get the amperage a bit higher 10.3 amps with an increase in voltage however the power supply trips sooner). It makes no difference if I use a manual switch or the Standard Ignition relay to the board, the power supply trips. I only have 700 degree Tempilaq, forget about that for a minute please, I purchased that before I was convinced I need to generate higher temps to get a good anneal.
What I have tried: different switching methods to the ZVS board, a new ZVS board, checking all connections on the board, ensuring the heat sinks aren’t shorted, configuring the RSP-750 to current limiting mode (I don’t think this worked since the power supply wouldn’t generate hardly any power), I have made multiple coils, expanded my coil, compressed my coil, ensuring my coil isn’t shorted, raising and lowering my brass within the coil, etc. My power supply is currently set to factory defaults (pins jumped according to the spec sheet).
I know I’m forgetting something I’ve tried and/or explaining my setup properly. There is no metal in or around the coil or the board (other than the brass). I have a video to demonstrate the operation and to show the build.
Thanks!