Bob Trancho wrote: <Snip> <Snip> Exactly. Double the batch could be done with (about) the same size heati= ng coil in double the time, which wouldn't be a bad thing in my eyes. -- Rick This message was sent from my Palm wireless email account. homeroast mailing listhttp://lists.sweetmarias.com/mailman/listinfo/homeroast
I've been able to get 6 oz roasts with my HWP using a few mods, but was unhappy with the uneven, flat results. I reversed all the mods to the original because I really didn't want to go further and make irreversible changes to the roaster. Check the archives here and alt.coffee for details. If the standard HWP is that close to doing 6 oz roasts, then it seems feasible that with a few enhancements, it could do 6 ounces. I think that increasing the hole size near the center would allow even more airflow. Agitation of the larger batch was an intermittent problem. Using a variac to bump up the voltage to the fan and heat element might also do the trick. Using a resistor that would allow higher temps would also improve the roast in light of greater air flow. *********** Here, in a nutshell is a summary of my mod to go to 6 oz. roast batches with the HWP: First, I took out the little washer at the base of the bean dispersion shaft to allow greater airflow (it really does make a difference). I then used 3/4" of spacers to lift the dispersion shaft higher to accommodate the extra volume of beans. I needed to buy a longer screw to do this. Ed Needham ed **********************************************
<Snip> with <Snip> shaft <Snip> do <Snip> Ed, Last week I did almost the exact mods to mine! Great minds think alike, eh? My first attempt was to try a 125g batch. Set it on 7.0 Burnt the cr*p outta it! Then, I turned a brass 7/16" high spacer to the dispersion rod and removed the washer. The greater flow had no problem moving 125g batches. Set it on 7.0 But, the roast went too fast and tasted like something from a grocery store, but closer to the roast I expect from a 7.0 setting. However, this lead me to believe that I could replace the 1/2" washer with a 7/8" fender washer, reducing the airflow and maybe increasing roast time. It might make a simple way of getting longer roast times. I'll let you know tomorrow when I time some roasts. I went back to my 83g batches (83g makes just the right amount of ground coffee for two French press pots, hence no leftovers). With the new HWP coming along I don't fee compelled to do much more in the way of modifying my roaster. Eventually, I'll give it to a friend and want it to be original. Dan homeroast mailing listhttp://lists.sweetmarias.com/mailman/listinfo/homeroast
Great ideas guys! I look forward to trying them. I'm roasting 100g batches now with times ranging from ~6:30 to 8:00 (city to full city), depending on the coffee and my mood. Do either of you expect to be able to go beyond 125g? --- Original Message --- From: "Dan Bollinger" To: Subject: Re: [RE: +HearthWare's new roaster] <Snip> 6 oz. roast batches <Snip> the bean dispersion <Snip> difference). <Snip> shaft higher to <Snip> buy a longer screw to <Snip> Great minds think alike, <Snip> 7.0 Burnt the cr*p <Snip> dispersion rod and removed <Snip> 125g batches. Set it on <Snip> something from a grocery <Snip> setting. <Snip> the 1/2" washer with a <Snip> increasing roast time. <Snip> times. I'll let you know <Snip> right amount of ground <Snip> to do much more in the <Snip> it to a friend and want <Snip> t homeroast mailing listhttp://lists.sweetmarias.com/mailman/listinfo/homeroast
I tried the mods this morning and had a mixed result. I pulled the washer and added about 5/16" of washers to increase the height of the dispersion rod. I measured 125g of Sumatra Triple Pick and put the thermocouple in the beans. The agitation was so low I knew I'd loose the roast if I didn't intervene so I did what all home roasters did, I winged it. I picked up the roaster and swirled the beans to prevent burning the bottom layer of beans. After about 1.5 minutes of swirling I sat the roaster on the counter and watched the temperature and agitation. First crack was at 4:47 and this roast went into the second crack by maybe 10 seconds, the beans were slightly shiny. Total time was 8:55 (normal time for this roast on the stock HWP has been ~7:30-7:50). The top temp was 247C but the curve won't be pretty. Because nearly all the agitation was with the fan on high speed (which didn't happen often) the temperature fluctuated quite a bit. My questions now are: 1. Will raising the dispersion rod another 1/4" increase agitation enough to roast 125g? 2. Will the current setup work with 120g? 3. The real prize - will this change in equipment have a positive affect on the coffee? I was hoping that once the beans began to loose some weight from moisture loss that the fan would be able to handle the load. I was partially right. Whether or not the agitation was adequate I won't know until I taste the coffee - Monday or Tuesday. The roast looked pretty even.
Jack, I did some more testing, too. Coincidently with Triple Pick! They must be very dense beans. I had trouble agitating 83g with the washer out! I'll give everybody the data once I do a cupping. Dan
I couldn't get it to make a good roast. It sometimes looked good, but tasted very flat. Other times it was obviously an uneven roast. A looonnnggg time ago, I posted that if you tilt the Melitta Aromaroast (some may remember that roaster), it would agitate the beans better. I also used this method with the HWP and it helped a bit. I think the key to using these mods may be to get a variac and a 'hotter' resister for the HWP, otherwise, it just doesn't have the ooommmmph. Ed Needham ed **********************************************