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Thanks J, let me know which screws you're looking at.

Allen

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You are correct, sir! I actually had it running and then lost free time to continue and it's still sits at the back of the Playground on a bench awaiting further attention.

However, you're project has given me inspiration and an idea or two. Maybe I'll get back to it soon now.

John

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Can't wait to see it in operation when you've got it where you want (plus minute by minute shots of mods/changes in progress).

Allen

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Made some additions to the Easydrum roaster over the last couple of months:

-Added an air plenum with blower and chaff collector to the side of the base
-Added a fill funnel to the front with lid and side port exhaust tube connecting to plenum
-Constructed a damper allowing variable exhaust from drum and full cfm from cooling tray at end of roast.
-Added feet to base

Today I did the first roast after mod's and went great! Roasted 12 oz of a high grown Peruvian to first snips of C2 and tasted great brewing right out of the roaster.

Settings:
-Under drum heat set at 850 watts for duration of roast
-Radiant in-drum heat varied from 600 watts to as high as 1000 watts throughout roast.
-Control = manual with RoR meter (TC4) display. 5 min to 300F, 5 min to 1C, 3.5 min to first outliers of 2C.

In the next few posts I'll post some videos showing the mods.

Allen

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2nd Video

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3rd Video

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4th Video

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5th Video

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6th Video

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Sounds like you still had a little power left over? Very nice!-Scott

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Yes, a couple hundred underneath and around 400 radiant. We'll see how much of that we'll need for 16 oz batch. I'm hoping it will pull it off.

I was worried with the blower attached I might not be able to hear the pops but it was loud and clear for both first and the whisper ticks of 2C outliers.

One word of caution to anyone constructing a roaster using wood as I did for the base. If any sparks or tiny embers happen to hit the wood or MDF especially with an air stream across it you have the potential for a blast furnace real quick or worse, smoldering overnight and campfire in your shop while you're at work.

I used wood to try it out and will do sheet metal when I get ambitious but in the meantime I'm going to be very cautious.

Allen

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Oh, I almost forgot to thank you Scott for the nice aluminum tubes you sent me! That's part of one of them hooked to the fill funnel.

Cheers

Allen

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Great Work! The mechanism for dumping the beans is brilliant. Looking at the front face you'd never think that the whole thing slides out then tips forward. Dang. That must've been a challenge to engineer.

Thanks for posting videos. Its great to see the mechanics in motion.

Russ

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Thanks for the complement Russ. Actually, the tilting with sliding front was much easier than I imagined it would be. The hard part was finding compression springs that were low enough tension and the right length to close tight enough but not cause the roaster to slide forward when dumping.

I'll have to say, the engineering you've put into your 3 barrel beauty is to be commended! Looking forward to seeing live roasting footage!

Allen

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One word. WOW!!!

John

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Allen, very ingenious pre-exhaust motor chaff collector.

Len

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INNOVATION abounds!


CHAD

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I'm getting close to wrapping up the conversion of my Easydrum 1 lb drum roaster from electric to gas (propane).

The conversion included a Kelly Pneumatics mini proportional solenoid valve http://www.kpiweb...s-MPV.html controlled by a TC4C with Roastlogger with a driver circuit in between designed by Stan (rustic_roaster). Thanks Stan! Your design worked perfectly with no tweaks.

Principle of operation is as follows:

The TC4C's output normally intended for driving an SSR (pulsed 5 vdc on/off is sent to the driver board which outputs a higher and lower user adjustable voltage to the proportional solenoid giving you a high-state and low-state gas output every time the TC4C cycles on/off. You could compare the operation to how a TC4C controls an electric element via SSR but instead of on/off we're cycling the burner between low fire and high fire so the burner doesn't need to be re-lit during each on-cycle.

Once you've set your low and high burner output levels via two, front panel accessible variable resistors, then the TC4C will vary the duty cycle (% of time at high fire versus low fire) as needed to maintain setpoint while in PID mode or to hold % output when in manual mode in Roastlogger.

The burner is just 1/2" iron pipe with hacksaw slots every 1/2" or so throughout the flame length. The orifice/venturi is from an old Bernzomatic soldering torch and is mounted to the rear of the roaster. (photos to come soon).

Other parts of the conversion will follow soon as well with photos.

Here's a video of the burner in action:

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WOW! that's really a great design, combination chaff collector and bean cooler. INGENIOUS!

Tiopaeng

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I will second WOW, that looks really nice. Build Me One! I really like the burner off to the side I think it will roast great like that. It takes much more work to build with a small footprint yours looks great.