I totally agree that PID "alone" will not work good for an electric roaster. If forced to choose between the two methods I would (and indeed now do) choose the action/time based method. But I also believe that PID has its place at certain times during a roast, and that it can be appropriately tuned ...

Marvin, what you are doing is a tried and true method based given the control systems we have to work with. Its what I did on the P2. What you are ultimately trying to do when you reduce the heat to 75% is control the BT ROR and slow it down. You have found through educating guessing and

Thanks Tom, I am looking forward to the journey. I think I am ok on the clearance between the compression nut and the vane, a good 1/2 inch there as well. I will use your creative bend if I run into trouble. Where it cut close though was my placement of the ET probe. It is so close that adjusting

Finally got all my parts sourced, one part turned out impossible to obtain and I had to fashion it my myself. Total project, including the 2 thermocouples and mounting the HTC/TC4 board, took about 10 hours from start to finish once I had all parts in hand. Could have done it in less but I took a "l...

OK, I got the exact dimensions of the compression fitting finally so I made my magnetic "mock" probe. I took one of those self adhesive rubber magnet business card backings and using a 5/16 punch (the exact diameter of the compression fitting nut) I punched out enough dots to stack up to the thickne...

Actually, it was economics that drove me to do it. I already owned her, had her for 12 years, only paid $450 for her new back in Y2K and got more than moneys worth out of her. When I looked around about a year ago I quickly saw that anything I would actually want to buy would have been over

No, I ordered it special for her, but I have used a lot of these Idec SmartRelays for various small projects. They are economical, and powerful for their size and cost. She runs GREAT. She is still sensitive to grind, but she is semi-automatic, with all variables configurable. See "this page" for a ...

My Lady Silvia and Stepless Rocky. NOT just another PID mod! PID Temperature control Pressure Gauge PLC control Individual manual override for water, pump, 3-way valve, and heat Plumbed into house water supply Drain in

The main reason is the drum vane that Greenbean spoke of. My probe will stick out at least an inch, therefor I cannot go under the vane, so I chose to go "beyond" the vane. In order to leave enough clearance so that beans dont get caught between the probe and the vane I had to go 7/8" inward from

Swiped a photo from the Hottop site. This shows my target area on the back side of the bulkhead. {image}