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Pid rancilio silvia with delta dtb4824vv
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larson1042
Senior Member


Joined: 19 Jan 2014
Posts: 1
Location: Hartford ,NY
Expertise: I love coffee

Espresso: Rabcilio V3
Grinder: 1898 Enterprise no.2
Posted Sun Jan 19, 2014, 9:58am
Subject: Pid rancilio silvia with delta dtb4824vv
 

I have some electrical expertise and began to pid my silvia v3 with a delta dtb4824vv used in conjunction with 2 40amp ssr switches to control the brew and steam thermostats. I just can't get my head around what should be a simple programming procedure for this pid controller .Are there any listeners with experience in this matter who can give me step by step programming instructions for this model. Thanks
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dana_leighton
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dana_leighton
Joined: 11 Jan 2002
Posts: 1,937
Location: Little Rock, AR
Expertise: I live coffee

Espresso: Isomac Relax; Caferina...
Grinder: Macap MXK; Baratza Vario-W;...
Vac Pot: Yama 5-cup
Drip: Technivorm; CCD; Melitta
Roaster: Poppery I w/PID controller
Posted Sun Jan 19, 2014, 10:20am
Subject: Re: Pid rancilio silvia with delta dtb4824vv
 

I am using a Delta DTB controller on my roaster. On my espresso machine, I used a Watlow controller. I find the DTB's front-panel interface very complex and time-consuming. It is easier to adjust it using the RS485 computer interface. Relatively easy to connect using a USB-to-RS485 interface. This one from FactoryMation is what I use. Then run a RJ45 cable to a RJ45 jack on the back of the box where the controller is mounted - This one from Radio Shack does fine. Two small gauge wires run from that to the controller.

In case you do not have it, email me and I will send a copy of the instruction manual for the DTB.

In terms of setting the PID values, start with the auto-tune, and then adjust the parameters until you get a slow (but not too slow) approach to the SV so you do not overshoot (takes a long time to recover from overshoot). It's a lot of trial and error, but there are some instructions around here if you use the search.

 
Dana Leighton - Espresso hack and CoffeeGeek moderator
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