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
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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