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Gravity Fed smokers and Grills We are the inventors of these Gravity Fed Smokers and Grills. Innovative and efficient, these BBQ Grills and smokers can burn multi-fuel of charcoal, Wood Pellet, Wood Chunks, Wood Logs and reach temps of 300C or 572 F.


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Unread 02-02-2012, 05:22 PM   #46
Triple T BBQ
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Just a quick update to this thread. I ordered one of these and due to some confusion about his ebay add, we ended up changing the order. I wanted Wifi/Web control and the fan and smoker adapter, not just the base unit. Wang has been in constant communciation so far and quickly updated my order and emailed me and updated my paypal bill within hours. So far, great service. Waiting to hear when it will ship and we can get on with calibration testing and actual product use. Pics to follow as soon we get it here.
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Unread 02-02-2012, 07:58 PM   #47
woodpelletsmoker
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Default Fan is out of stock. shall be ready on Feb.06

Quote:
Originally Posted by Triple T BBQ View Post
Just a quick update to this thread. I ordered one of these and due to some confusion about his ebay add, we ended up changing the order. I wanted Wifi/Web control and the fan and smoker adapter, not just the base unit. Wang has been in constant communciation so far and quickly updated my order and emailed me and updated my paypal bill within hours. So far, great service. Waiting to hear when it will ship and we can get on with calibration testing and actual product use. Pics to follow as soon we get it here.
I am planning to send Monday orTues
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Unread 02-02-2012, 08:25 PM   #48
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My order is in as well. I chose the Tiger model which comes with a remote and I got the flange adapter with the pipe fitting so I can attach it to my UDS easily. Looking forward to giving this a good workout and passing on a review.



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Unread 02-03-2012, 05:48 PM   #49
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cooking to briskets tomorrow, will try and remember pics.
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Unread 02-03-2012, 10:25 PM   #50
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Looking forward to it. More important than pictures would be a log of the cook and a secondary thermo to verify temps.
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Unread 02-04-2012, 09:17 AM   #51
landshark530
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[Dear landshark530, if you fine tune P.I.D, temperature fluctuation shall be under 1or 2 F.
First set I=0. and D=0. Try P from a small value, say 5, and increase step by step, till temperature goes crazy, out of control. then drop P again step by step till the temperature is stable. the P value shall be 60-70% of this stable value. Then try different I and find the best value, last D. This is a trial and error practice. Different application may have different PID value.[/QUOTE]

For long cooks (5-14 hours) with temps set in the 250 to 350 range, what would be a good setting for I and D ??

Should they be changed at all?? Why was the default at 60 and 240?

Thanks
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Unread 02-04-2012, 09:32 AM   #52
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Default As long as the PID are tuned in a smoker, you can keep them

Quote:
Originally Posted by landshark530 View Post
[Dear landshark530, if you fine tune P.I.D, temperature fluctuation shall be under 1or 2 F.
First set I=0. and D=0. Try P from a small value, say 5, and increase step by step, till temperature goes crazy, out of control. then drop P again step by step till the temperature is stable. the P value shall be 60-70% of this stable value. Then try different I and find the best value, last D. This is a trial and error practice. Different application may have different PID value.
For long cooks (5-14 hours) with temps set in the 250 to 350 range, what would be a good setting for I and D ??

Should they be changed at all?? Why was the default at 60 and 240?

Thanks[/QUOTE]

If you change a new pit, you need to tune PID again.
At first I just use the default for other application. not for smoking.
Smoking in China is not popular, or not accepted.
I develop all these things just for export
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Unread 02-04-2012, 10:08 AM   #53
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I understand the export reasoning, and the application and your application may be different. I'm trying to understand "if or why" I would need to change the default settings, and how that exactly works...meaning...how do you "tune" the pid controller if you want to.

It works fine as is, but you mentioned a few posts back that I can get better performance my tuning it. It's the "tuning" I am clueless about.
Thanks
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Unread 02-05-2012, 06:10 PM   #54
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Default not without drama

So I started yesteray's cook. The goal was to cook 2 8# briskets that my neighbor brought back from a trip to Texas. This was my first attempt at a full brisket. I thought that they were full briskets. I believe that they were just large flats. The plan was to use the hot and fast method from a certain tv bbq personality.
The recipe calls for the meat to be smoked in a aluminum pan, and to cook/smoke at 350 degrees.
I started the fire in the sode firebox of my chargriller. Because the controller has a manual setting that runs the fan at full, I started the fire and used the manual setting to get up to temp. I just had to watch the temps as the fire was getting constant oxygen. I was using oak, cherry, and apple woods
I got up to temp with no problems. I put on both pans of meat and started the cook. The pans were probably too large and covered 90% of the cooking surface, limiting airflow. More on this later.
There was a post regarding temp verification. I verified the temp probes when I bought the unit using the outlet of my peller stove. I forgot to mention I also tested them in boiling water, switched the probes, and retested them. Mr chargriller as 4 thermometers stuck in it from previous use, as the factory thermometer on the main unit is about as usefull as a screen door on a submarine.
I was, and still am confident that the probes are accurate and work properly.
Back to my cook. As soon as I added the pans my temp dropped to 250 and I could not get it to rise. The controller was set to 350, and the fan was running. I had a huge fire and would have melted iron with it.
I was using a difusser, so I moved that to allow heat to get past a slot and into the main chamber faster, still no temp rise. Was maintaining 250, but I needed 350, wtf...
More double checking and then I figured it out. I had put in a mod to the exhaust stack using 2 3" flex elbows to get the grill to vent better. The end of the modded exhaust was stuck down in one of the pans when I closed the lid, cutting of the airflow. I pulled that off and smushed the pans to give me more airflow. Temps jumped to 350 and stayed there.
The briskets were done in 4 1/2 hours. Threw them in a cooler for another 4 hours. They turned out tender enough, but I was dissapointed with my first hot and fast attempt. It was not worthy of pics.
Now that I pulled off the meat, I ran the controller the rest of the day. I ran steady at 350, and fluctuation was always between 350-355. I flipped it to manual and ran it up to 400 degrees, and put it back on auto. I cooled back down, recovered, and ran at 350. I dropped it again to 250 and it cooled the grill and then ran at 250 without problems. My other temp guages were spot on. The factory unit read 150-160 degrees all day. That one will be ripped out this spring....
I'm a stickler for maintaining temps and this unit has proven itself, even if though I fell I screwed up on the cook.
The manual setting is a nice feature not really advertised. If you happen to take a nap during the cook and forget to throw on a log, you can do so, and then put the unit on manual and get back up to temp fast. Once back up to temp throw it back on auto and you're back on track.
I researched some other threads regarding pid builds and their pid settings are consistent with the ones posted here, but I'm not going to mess with the factory settings until I full day during the spring or summer to just play with it. It's too cold to mess with it now. As it is it runs great and I don't see the need to tweak it.
So the question is, would I buy one again. Hell yes, and I will be getting the wireless version. Probably stick this one on my uds.
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Unread 02-05-2012, 07:03 PM   #55
woodpelletsmoker
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Thanks landshark530
None else gave me such detailed feedback before you.
Temperature fluctuation of 5 F may be due to different design of fire box.
Usually you guys have much bigger fire box than gravity feed burner of mine.
the "fire box" of my burner is 4"x6"x1". It can only burn broken charcoal and pellet.
Temperature fluctuation in my insulated smoker is 1F
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Unread 02-05-2012, 07:29 PM   #56
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Interesting review landshark530. It does stand to reason that temperature control on a chargriller could be a challenge even with this controller based on the nature of the cooker. Still, a 5 degree variance is pretty good. I have a COS that I have played with at times and I know how difficult it is to control temps over long periods of time. I look forward to receiving my unit and putting it through its paces.

I am kind of confused about your references to Manual setting. You say the Manual setting runs the fan at full but then you said you dropped it to 250. So, I am assuming that the manual mode allows you to set a target temp that is not part of the program? I am thinking along the lines of a programmable home thermostat. You have your set program but you can raise or lower the temp in a "manual" manner when you want. Am I correct here? I guess I will figure it all out soon enough. Thanks again for your review.
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Unread 02-06-2012, 06:51 AM   #57
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BY manual, you can change speed of fan by press "+" or "-".
It has nothing to do with probes.
It is up to you, your experience, your eyes.
When I do searing, I use manual mode,and keep pressing "+" till the maximum fan speed
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Unread 02-06-2012, 07:20 PM   #58
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I did not know I could change the fan speeds. I just knew that when I switch to manual it runs the fan non stop. Learn something new every day, I missed that part on the Manual.

When I changed the temps I was in the automatic mode and wanted to see how the unit did when changing temps,etc. So in the test I ran it at 350, then changed the set (auto) temp to 250. The unit stopped the fan until the unit cooled to 250, then kept it there as programmed.

I made the mistake of putting too much on the cooking surface, (the large pans) that cut airflow by at least 80%.
Live and learn I guess.
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Unread 02-06-2012, 10:20 PM   #59
woodpelletsmoker
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Default pardon for my poor English manual

I must need professional to write operation manual.
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Unread 02-06-2012, 10:31 PM   #60
colonel00
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Once I get mine, I will be more than happy to help with the manual.
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