A quick review of the layout and a quick check with a Multimeter.

Wednesday, November 3rd, 2010

Today was spent making slight changes to the layout of the control panel to make sure that everything is going to fit before we bolted it in. The space isn’t always that crucial but we decided to make our control box as small as we could, partly for cost savings but mostly for esthetics. We got everything to fit just like we wanted it without any problems, and we are ready to wire it up tomorrow. We also had to get the mod motor for our gas valve working. This is the valve that will allow us to turn our gas pressure up and down and vary our inlet air temperature. It is supposed to change its position based on the position of a 0-10 Vdc potentiometer. Our first problem was that the company that supplied it to us offered no support. The second problem that we ran into was that no one offered any support. Ok, no problem, the first thing you do when this happens is call the people you know who do offer support. In our case it was the people who supplied us with the potentiometer. They may not have any experience with the device that we are using, but they do know about potentiometers in general. They explained to me how most devices that are wired to a potentiometer work and how they are wired. With that information, I did some quick tests with a Multimeter to show me exactly how to wire it and after getting two wires mixed up we are almost on track. The only issue we have left with it is that the potentiometer that we bought has a 270 degree turning radius but the valve only turns 90 degrees (open/closed). This means that the valve only turns on 1/3 of the potentiometer’s radius which isn’t a huge problem. What we have will work for testing purposes until a new one shows up. The bottom line is that we now have complete control over our inlet air temperature from the control panel.

No Responses to “A quick review of the layout and a quick check with a Multimeter.”

XHTML: You can use these tags: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <strike> <strong>

By submitting a comment here you grant 428 Roasters a perpetual license to reproduce your words and name/web site in attribution. Inappropriate comments will be removed at admin's discretion.

Latest From the Blog

Stainless vs. mild steel, the throw down.

Where to start, where to start.  There are so many different aspects of these two metals that we could talk about but so we don’t bore anyone by making the article 20 pages we will (try)… Read More

Blog Dates

The posts below this one were transfered from our other blog and so the dates that are on the blogs are no longer correct.  Sorry for any confusion.

New green bean bin design.

Just a couple pictures of a green-bean bin we designed and built for a client. The viewing window in the front is an easy way to measure the volume of the green. We can add… Read More

All Blog Posts

The Fluid-Bed Advantage

The most efficient and accurate way to roast, fluid-bed involves almost no moving parts or maintenance. We're constantly in the lab engineering better technologies to integrate into our roasting systems.

More Info

History of Coffee Roasting

Legend has it that goats were the first to discover the joys of coffee, only they--and then the Galla tribe in Ethiopa tending them--chewed the green berries raw….

More Info

Not Just Coffee

Coffee beans are not the only product that can be roasters on a fluid-bed system. All sorts of beans (think cocoa) can roast to perfection, as well as nuts, seeds, and even grains.

More Info