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PostPosted: Mon Aug 29, 2016 9:23 am 
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Golden Robin
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Where is the air spaces ??

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PostPosted: Mon Aug 29, 2016 10:43 am 
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Proud Rooster
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Good to see the project is close to the testing stage.
I am no electronics expert but perhaps a delay timer module would solve the problem with the egg turner. Low voltage versions are available for a few dollars and allow you to fine tune the turning sequence to the second.


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PostPosted: Mon Aug 29, 2016 10:59 am 
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Showy Hen
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Hi Benen,
Good to see there are still a few motivated people left.
Would it be possible to see a closer photo of your timer please? I use (from the looks of it) one of these to control my hydronic heating and want to get one for a spare.
Does your fan just circulate the inside air? or have you got it vented to the outside? Its hard for me to see in the photo.
I would add to Mikes comment from above also.
Keep in mind you the need to have air flow to be consistent throughout the incubator. If the fan is mounted on the flat surface as it seems, then it will be trying to suck air from all around itself. this will create issues with trying to get good flow to all spots In the incubator.
Its hard to see from the photo, but it doesn't look like you have airflow all around your eggs? ie top and bottom?

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PostPosted: Tue Aug 30, 2016 3:09 pm 
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Gallant Game
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on the egg turning can the timer be set to turn the eggs a turn and a half?


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PostPosted: Tue Aug 30, 2016 3:17 pm 
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Showy Hen
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The turner can only come on for 1 minute intervals unfortunately. But is a little inconsistent on the full turn which will work to my benefit. I have a picture of the timer and where I will drill the venting below.
The fan is mounted about 50mm from the wall of the incubator but there is around a 2 degree Celsius variance from end to end of the incubator so I might need another fan.


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PostPosted: Tue Aug 30, 2016 3:21 pm 
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Showy Hen
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The timer was about 5 dollars on eBay I believe. The model is L701 for the 12v version :-)


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PostPosted: Tue Aug 30, 2016 4:20 pm 
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Golden Robin
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Where is the heating element being mounted, what sort of heater is it. ??

I am concerned about the two degree difference as the fan's role is to merely circulate heated air around - nothing else.

Mike

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PostPosted: Tue Aug 30, 2016 7:58 pm 
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Showy Hen
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I agree with Mike, you wouldn't want the fan sucking air from the outside. It just needs to circulate the air that is inside the incubator. If you suck air in with the fan you will never keep the humidity where you want it.

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PostPosted: Tue Aug 30, 2016 10:30 pm 
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Showy Hen
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Hi guys, the fan is circulating the internal air and also blowing through the heater. It is not sucking air from outside.
I have had the incubator on for a few hours today and it is sitting at 37c quite consistently and the humidity is 60%. I am thinking of trying out some eggs in it tomorrow morning :-)

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PostPosted: Tue Aug 30, 2016 10:57 pm 
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Showy Hen
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Couldn't wait until morning haha.


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PostPosted: Tue Aug 30, 2016 10:58 pm 
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Golden Robin
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I hope I am not trying to teach you to suck eggs (to use a phrase). When you do put the eggs in the temperature will drop (depending on the output of the heater) as the eggs take in the heat. It may be as long as twenty four hours until the core temperature of the eggs is up to incubation temperature at which point the incubator temperature stabilises again. An egg is a massive heat sink. Just let that happen without adjusting temperatures.

Also (sucking eggs - sorry) incubation doesn't start until the eggs are up to temperature and then it approximately twenty one days incubation. Real time can be twenty two days from eggs in to chickens out.

Mike

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PostPosted: Tue Aug 30, 2016 11:20 pm 
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Showy Hen
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Yeah great thanks Mike haha.
It dropped to 33 when I put the eggs in and is slowly rising up again. I have the thermostat set at 38c so it should adjust by itself over the next few hours. I'll keep you posted on how it goes!
Candle at day 5 is the normal thing to do?

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PostPosted: Tue Aug 30, 2016 11:31 pm 
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Old Mother Goose
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Better to have the temp slightly low rather than too high. Measure the temp at egg level and adjust the thermostat to maintain the correct temp there. I prefer to candle between days 7 and 10.
Aim for humidity at about 45%, again better lower rather than too high until lock down.
Good luck.


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PostPosted: Wed Aug 31, 2016 9:14 am 
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Proud Rooster
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I calibrate the temperature sensor in a machine to agree with the air temp in the egg space without the eggs.
Once an egg is 12 days old, the embryo is emitting heat: 38.0c @ day 12; 40.0c @ day 21.
(In a multi-stage machine), what you don't want is to "take the embryos' temperature" instead of the air's.
Cheers

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Last edited by Redlander on Wed Aug 31, 2016 9:23 am, edited 1 time in total.

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PostPosted: Wed Aug 31, 2016 9:18 am 
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Proud Rooster
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Here's a table of `Heat Production \ Temperature \ Time'

http://ps.oxfordjournals.org/content/92/3/620/T1.expansion.html

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