Over the last couple of days I put together an induction annealer setup. All components minus the coil were sourced from Amazon. I turned the coil myself from solid copper wire to ensure proper inductance and distance to the case. The power supply is 24V/15A. Switching frequency of the induction coil is ~120 kHz. The coil supplied with the ZVS unit was far too large in diameter and would not sufficiently heat the brass with the 24V/15A supply. Proper coil sizing is key. I have not found a need for any additional cooling. The PCB and components are barely getting warm.
The 1/8" rod under the coil is the release mechanism to allow the case to drop. I am contemplating adding a push/pull solenoid to automate the drop at the end of the cycle but at my processing rate it isn't necessary.
Using 750F Tempilaq as an indicator my run time for a .223 case is 3.4 seconds. A tenth of a second can make a significant difference. The picture showing both cases is only a delta of 0.2 seconds. A run time of just 7.5 seconds will have the brass glowing red hot as seen in the pic. That is far too hot for annealing but I provided the pic to illustrate that it doesn't take long to over anneal. Average power consumption during a cycle with the current setup is ~260W. With a different power supply and additional cooling the system can run to 1000W.
This is a sub $100 build and the results are consistent and repeatable.
Tim
The 1/8" rod under the coil is the release mechanism to allow the case to drop. I am contemplating adding a push/pull solenoid to automate the drop at the end of the cycle but at my processing rate it isn't necessary.
Using 750F Tempilaq as an indicator my run time for a .223 case is 3.4 seconds. A tenth of a second can make a significant difference. The picture showing both cases is only a delta of 0.2 seconds. A run time of just 7.5 seconds will have the brass glowing red hot as seen in the pic. That is far too hot for annealing but I provided the pic to illustrate that it doesn't take long to over anneal. Average power consumption during a cycle with the current setup is ~260W. With a different power supply and additional cooling the system can run to 1000W.
This is a sub $100 build and the results are consistent and repeatable.
Tim