Modulating Auto Draw-off

[DougM]

2020 would be great, thanks. If there's no easy way to post it you can send it to me at eskimoin@gmail.com
Thanks!

[BRL]

Here is a little video of the first draw off. Still need to learn a bit and I should probably run it through auto tune but it works!

https://www.youtube.com/watch?v=KRfbdrPbHCQ

[wmick]

Here is a little video of the first draw off. Still need to learn a bit and I should probably run it through auto tune but it works!

https://www.youtube.com/watch?v=KRfbdrPbHCQ

Id be very interested to hear about your progress.... and how you've programmed the PID.. I've been daydreaming about building one of these recently.... Trying to decide between PID and a simple on-off. My only experience with PID controllers was on a plastic extruder...(running valves for cooling lines and electric heaters) From what I remember, it worked very well when things were running consistently... but if there was an unusual change in the process, EG. stopped the extruder for a few minutes to do a screen-change, etc... (which would eliminate friction heat for a time),,, it would over-cool and take a long time for the controller to get things figured out again... Could be that we just didn't have things programmed properly?? I've been wondering if an auto draw off would have the same sort of issues if I was late with loading wood, etc... Thanks for the update... I look forward to more...

[sam2145871]

Any updates on this? It would be great if you could post some more pictures and the wire schematic is very fuzzy. If you wouldn’t mind emailing me the schematic in a larger former I would appreciate it! My email is sam2145871@hotmail.com. Thank you!

***Edit- I also forgot to ask exactly which PID did you buy? There are three choices and I’m not sure if the RS-485 communication or the SSR features are useful or needed for this. Thanks again.

Marcus

[BRL]

Hey Marcus, the model is SYL-2381-mA. Should be the first option in the drop down menu. I'll send you some info when I get a second.

[JPGraphX2]

Hello, Could you give us PID parameters ? Thanks!!

[Bricklayer]

What did you end up using for a bracket to secure the valve actuator ? And did you have to get an extension for the butterfly valve shaft ?

[Bricklayer]

Been working on changing my auto draw to a modulating auto draw.
I’ve pretty much got it done. Just waiting on a couple parts to arrive.
I went with the belimo actuator and butterfly valve but if one wanted to save money you could buy a motorized ball valve on Amazon. (5 wire ) and the auber PID will still operate it the same as a belimo.
One good thing about the motorized ball valves is that they have capacitor return. The belimo valve is a fail in place actuator. So if you lost power while drawing off. Your valve would stay open and not close untill power was restored.

[bmbmkr]

Bricklayer,

How did you attach the Belimo valve to the butterfly valve? I have butterfly valves connecting my flue pan to dyrup pans, but you have to pull the lever out to turn them. I'm sure they make a butterfly valve without the lever lock, and I saw you asked the same question to the OP. I am diving into this project this year. I appreciate any info.

[Bricklayer]

I had to take the valve to a machine shop and get them to weld the handle in the pulled out position and then weld an extension on top of the valve handle for the belimo to attach to.
I could not for the life of me figure out a way to attach the belimo to the valve. So I ordered the bracket from CDL that bolts right to the valve. Was like $60. Havnt had time to put it all together yet. Going to be my fall/winter project.