PID question

[chopsaw]

I’m going to try lowering the P from 7 to 2

P is measured in degrees ( maybe you know that ) so if your set temp is 200 , setting P to 2 means it kicks out of full power 2 degrees before set temp . Depending on what I is set at will control the over run past set temp .

 

[texbowhunter316]

P is measured in degrees ( maybe you know that ) so if your set temp is 200 , setting P to 2 means it kicks out of full power 2 degrees before set temp . Depending on what I is set at will control the over run past set temp .

Thank you Chopsaw. I did not know that!!
That’s way more understandable.

 

[tallbm]

Hi there!
Yeah with the Auber PIDs their tuning and algorithms have it to where you would lower the P value to get to your set temp faster.

Try lowering your P like you intend and see what happens. The good thing with sausage and stick making is that you walk the temp up so you shouldnt have a drastic overshoot that would affect your sausage as you walk the temp up :)

Let us know what you figure out and grats on the deer meat, I didn't get to hunt last year, had to tighten the purse strings :)

 

[texbowhunter316]

Since we are talking layman’s terms for me, now that we know what P does, what about I and D?

 

[chopsaw]

Not sure what smoker you have . Maybe I missed it . Here's some good info on an Auber used with an MES . I talk bout how I set mine up with an MES 30 starting with post 9 and 13 .

Did you look at the post in the link I shared above ?

 

[tallbm]

Since we are talking layman’s terms for me, now that we know what P does, what about I and D?

With an Auber PID the "I" will help to control initial overshoot and I believe it also helps tighten the oscillation up/down around your set temp. Chop has this covered in a post above.

Basically every PID device can be different but Auber is pretty consistent with their PID settings and temp control algorithm (steps to solve the problem) using the PID settings.
A little bit more layman's explaination here.

P - I believe with an Auber controller the "P" value will go full power to heat until you get within the P-settings number of degrees below the set temp. So if P=7, you get full power until 7 degrees from the set temp then it cuts power down as it approaches set temp and when it hits set temp or is over P will not provide any power. think of "P" as like brute force come up to temp power setting provided you tuned "P" properly.

I - starts to kick in when the controller reads that the smoker temp is around the set temp. If it is below the set temp and moving lower "I" will feed more power to get to set temp. If above set temp and moving higher "I" will cut power to get to set temp. It does this to dial in and hold close to the set temp since "P" is often no longer in the mix. Also when set properly with "P" as "P" drops off "I" value will be used in calculation to help pick up to hit set temp OR help fight against "P" so that you don't way overshoot your set temp.
Think of "I" as the cruise control to keep you on target with your set temp provided you tuned "I properly."

D - is kind of the magical intervention fairy godmother looking at temp rate change. It frequently looks back in time to see what the temp was a few seconds ago and it compares to current temp and reviews your set temp. If you the rate of change is too drastic in any direction "D" will override "P" and or "I" to get or keep you around the set temp. So when you open the smoker door the temp drops like a rock and "D" comes to the rescue. Or if temps sky rocket to fast "D" attempts to come to the rescue.
Think of "D" as setting that handles uncommon temp change situations

With different PID manufacturers they do may do completely different algorithms (steps to solve the problem) therefore their PID numbers may be widely different.
The Auber behaves this way and is explained as so in their manual... provided I remembered it all correctly so you or anyone else please feel free to correct anything I may have misstated hahaha.

I hope this info helps :)

 

[texbowhunter316]

Did you look at the post in the link I shared above ?

I have not yet. I’ve been on night shift so I’ve just been popping in here glancing . I will check it out though.

 

[chopsaw]

I have not yet. I’ve been on night shift so I’ve just been popping in here glancing . I will check it out though.

It should answer your question .

 

[texbowhunter316]

It should answer your question .

It does chopsaw.
Great info fro you both.
Had a little time before work to read it.
Thanks guys. I keep you posted on the results.

 

[chopsaw]

Good . Let us know how it goes . Depending on the size of your smoker , the wattage of the element and if it's insulated or not , you may have to run it in an on off mode .