Induction brass annealer redux

[Michaël T]

Hi, I have build mine , water cooled, it works but I’m getting 16.7 amps loaded with 223 case mouth in the middle of the coil.
is it because I’m using the supplied coil that I have annealed and then recoiled to 1-1/8” id with 8 coils,
Same zvs 1000w board with 6x0.33uf, but using a 60v-20amp turned down to 43.3V
thank you
hope you had a Happy Thanksgiving

 

[Frog]

Hello Macheil
I would use the recommended 1/8 inch tubing
I'm showing about 12-13 amps with a 30/06 case
I'm going to try some 3/16 inch coil in the near future to see if I can get better water flow thru the tubing

 

[Michaël T]

Thank you I had a problem with water flow, but since I turned down the voltage from 12.4 to 7.5 that all went away

 

[Patrice COTTES]

I suppose if you don’t seat deeply and never have to bump the shoulders back then 3 to 4 would be ok.

Hello,
Thanks for your help.
I bump the shoulder back of about 1 or 2/100 mm after each shot.
I'll give a test with 4 seconds.
Best regards
PC

 

[Patrice COTTES]

Hello Macheil
I would use the recommended 1/8 inch tubing
I'm showing about 12-13 amps with a 30/06 case
I'm going to try some 3/16 inch coil in the near future to see if I can get better water flow thru the tubing

Hello
For my first test today, I annealed 80 7x64 RWS cases.
I use a 1/8 inch tubing and the water flows inside very well.
I used 43 Volts, 13 Amps for 5.5 seconds.
It was just for testing.
The coil was not hot at all and I could feel the radiator little bit warm, around 30°C.
I'll send later some pics of my annealer.

 

[Gina1]

Hi, I have build mine , water cooled, it works but I’m getting 16.7 amps loaded with 223 case mouth in the middle of the coil.
is it because I’m using the supplied coil that I have annealed and then recoiled to 1-1/8” id with 8 coils,
Same zvs 1000w board with 6x0.33uf, but using a 60v-20amp turned down to 43.3V
thank you
hope you had a Happy Thanksgiving

1/8" tubing is the way to go.... WWWay back when this project was first coming together 8/2017, Hollywood went thru many different coil deigns. Stick with 1/8" 8 turn copper tubing with 1 1/8" diameter coil and you will be right on the numbers.
Gina

 

[SGK]

Hello everyone
I just finished to build my own case annealer. Today I tested it for the first time and it works perfectly. Thanks so much to you all who brought your experiences. I've attached a file showing different annealing times on 6 mm PPC cases with a .262" neck.
I've used "tempilaq 750" on the necks and shoulders.
As we don't seat deeply the bullets in the neck, I think that the times between 3 sec to 4.5 sec are correct. But as I'm not sure, could you, please, give me your opinions.
I'll post later some pics of my annealer.
I've used a PLC and BCD coded wheels for changing heating times.
As this I can have 100 different heating times ranging from 0.1 sec to 9.9 sec. However, I can program it differently, for example starting from 2.0 sec 11.9 sec etc.......
Is it still possible to post a video on your web site?
PC from FRANCE

I would shift those cases a good deal higher in the coil so you don't completely fry the necks

 

[Michaël T]

1/8" tubing is the way to go.... WWWay back when this project was first coming together 8/2017, Hollywood went thru many different coil deigns. Stick with 1/8" 8 turn copper tubing with 1 1/8" diameter coil and you will be right on the numbers.
Gina

Thank you very much,

 

[Patrice COTTES]

I would shift those cases a good deal higher in the coil so you don't completely fry the necks

Hello
Thank you.
I'll give a test as you explained, but before I have tp modify the height of the trap door. I have to thin it out so I can put the case higher in the coil. I'll let you know how things work.
PC

 

[Michaël T]

Hi, Gina1 why we need a varitor over the relay?

 

[itchyTF]

Varitor? If you are referring to a device across the relay coil (DC), it would typically be a diode to "tame" the back EMF when the relay is powered off. If across the contacts it would be to reduce arcing (is that spelled right?).

 

[Michaël T]

Yes, the spelling is correct I also got it from the list on page 1,
i understand that most relays have a diode across the exciter coil.
question#1: is this acceptable?
i am only drawing 9.6 amp total with a 223 case opening set in the middle of the 1/8”diameter tube, 8 turn and 1-1/8” id
question#2:
why does my board stay powered up(29.4Vdc) for about 3 seconds after I have turned off the power(43.4Vdc)

thank you

 

[itchyTF]

I suspect you might have meant varistor. "They are often used to protect circuits against excessive transient voltages. When the circuit is exposed to a high voltage transient, the varistor starts to conduct and clamps the transient voltage to a safe level. The energy of the incoming surge is partially conducted and partially absorbed, protecting the circuit."

I didn't build a GinaErik. Mine was based on a board from Fluxeon which I think was called the Roy 1200. I don't monitor current so I can't comment on your 9.6A.

 

[Gina1]

I suspect you might have meant varistor. "They are often used to protect circuits against excessive transient voltages. When the circuit is exposed to a high voltage transient, the varistor starts to conduct and clamps the transient voltage to a safe level. The energy of the incoming surge is partially conducted and partially absorbed, protecting the circuit."

I didn't build a GinaErik. Mine was based on a board from Fluxeon which I think was called the Roy 1200. I don't monitor current so I can't comment on your 9.6A.

Could not have said it better.

 

[Gina1]

Yes, the spelling is correct I also got it from the list on page 1,
i understand that most relays have a diode across the exciter coil.
question#1: is this acceptable?
i am only drawing 9.6 amp total with a 223 case opening set in the middle of the 1/8”diameter tube, 8 turn and 1-1/8” id
question#2:
why does my board stay powered up(29.4Vdc) for about 3 seconds after I have turned off the power(43.4Vdc)

thank you

I'm guessing your turning off the 48 volt PS, but your 12 volt PS is still on. (running the volt/current meter) Hence your able to read the 48 volt PS as it winds down from being tuned off.
Gina
Also 223 cases are smaller than, say a 308 case, further from the coil, so less energy is transferred to the case.
Again I'm assuming your build is working OK with .308/ 30-06/ 7mm cases

 

[Michaël T]

Yes I meant varistor, since these are on back order from jameco can I use a diode instead?
my system is not complete, I’m using an automotive 5 terminal 30 amp relay to switch on/off power to the pcb controlled by a timer.
Some of my GinaErick parts arrived yesterday (timer, relay, solenoid, voltage/amp read out, buck converter
I have not tried 308/30-06-7mm
my main cases are 224 Valkyrie and 6xc
so far I have only annealed 223 cases for testing with 750 tempilac with success

 

[chuckswagger]

My annealing have a power section 24v and 20amp.
It shows 17amp in the multimeter when leaves the power source.
I have 9 coils 1/8 tubing.
The screen shows 23V and 6-7 amper consumption when it is on.
The problem is: It is taking só long to aneal 308 Win cases, about 16.4 sec.
What should I do to reduce the annealing time?

 

[chuckswagger]

One more pic

 

[Gina1]

My annealing have a power section 24v and 20amp.
It shows 17amp in the multimeter when leaves the power source.
I have 9 coils 1/8 tubing.
The screen shows 23V and 6-7 amper consumption when it is on.
The problem is: It is taking só long to aneal 308 Win cases, about 16.4 sec.
What should I do to reduce the annealing time?

Chuckwagger....

Not to give you a hard time, but countless GiniaErick annealers have been built throughout the US and across the world. The original parts spec's called for a 48 volt power supply and an 8 turn coil (1 1/8" ID).
Dropping the annealing voltage to 24 volts, reduces the power going into the coil.
In most cases the current for a .308 with a 48 volt PS is 12 amps. Power (watts) P=E x I
48 volts x 12 amps = 576 watts Vs 24 volts x 17 amps = 408 watts.
Hope this explains why your getting a longer anneal time.
Gina

 

[chuckswagger]

Chuckwagger....

Not to give you a hard time, but countless GiniaErick annealers have been built throughout the US and across the world. The original parts spec's called for a 48 volt power supply and an 8 turn coil (1 1/8" ID).
Dropping the annealing voltage to 24 volts, reduces the power going into the coil.
In most cases the current for a .308 with a 48 volt PS is 12 amps. Power (watts) P=E x I
48 volts x 12 amps = 576 watts Vs 24 volts x 17 amps = 408 watts.
Hope this explains why your getting a longer anneal time.
Gina

Not even. I appreciate all your help.

I have made as GiniaErick, but I have issues with ground and varistor burn, so a Friend of mine help me and made some modifications.
I feel bad to ask him to modify his work.
I will make what you are telling.