Search found 62 matches

by mcwresearch
April 27th, 2019, 6:02 am
Forum: Coffee Roasting
Replies: 6
Views: 261

Looking for Hottop 8828B pinout / protocol

Dylan, I got your email. Unfortunately I don't know what the pin-outs are either. However, I'm pretty sure I have my original users manual for the 8828-p. Maybe it'll have something in it. I'm traveling this week so it'll check when I return. Have you've looked on the board itself for any intuitive ...
by mcwresearch
March 27th, 2016, 7:35 pm
Forum: Coffee Roasting
Replies: 31
Views: 816

Drilling back plate of Hottop?

I assume you are looking for the red and black lines at the bottom of the graph, as in "this screenshot". You might try playing with the settings under Config --> Events --> Style and see if one of those options gives you what you want. I haven't played with them myself, but I wonder if Hex 1 and
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by mcwresearch
March 26th, 2016, 9:29 pm
Forum: Coffee Roasting
Replies: 31
Views: 816

Drilling back plate of Hottop?

According to "MLG and GreenBean's joint advice", it is safe to use IO3 so long as the operator doesn't increase the fan in steps greater than 25% and that warning is very conservative, being based on one case that the testers were unable to reproduce. The reproducible problem was hitting the EJECT b...
by mcwresearch
March 26th, 2016, 4:16 pm
Forum: Coffee Roasting
Replies: 31
Views: 816

Drilling back plate of Hottop?

To troubleshoot your fan, try the following: 1. With the HotTop set for 100% fan, test the HTRI at 0% and 100%. If there is a change, you just need to ensure the HotTop is programed for 100% fan for the entire duration of the roast. 2. Verify the configuration and syntax of the command for your
by mcwresearch
March 25th, 2016, 3:12 am
Forum: Coffee Roasting
Replies: 31
Views: 816

Drilling back plate of Hottop?

Both will control the fan. IO3 issues the command to the fan immediately. DCFAN "Limits the increase in duty to 25 points per second to address fan inrush current on Hottop (and possibly other) roasters." The inrush current problem manifested in limited cases right after pressing EJECT with the fan ...
by mcwresearch
March 23rd, 2016, 7:38 pm
Forum: Coffee Roasting
Replies: 31
Views: 816

Drilling back plate of Hottop?

The HTRI model I received didn't have a grounding cable but Randy's instructions show pictures with one, so I emailed Jim who sold me the HTRI and his response was: "In most cases a ground cable is not needed. The connector is provided in the event that you observe incorrect temperature readings tha...
by mcwresearch
March 22nd, 2016, 9:56 pm
Forum: Coffee Roasting
Replies: 31
Views: 816

Drilling back plate of Hottop?

I too have drilled the back plate, however I did not remove it completely from the roaster. If you are not careful and patient, the drill bit will indeed drift. I countered that by carefully and slowly starting the hole with the drill running slowly so I could keep it on point. Once enough metal was...
by mcwresearch
October 8th, 2015, 3:03 am
Forum: Coffee Roasting
Replies: 39
Views: 7673

How Does Airflow Affect the Roast

Airflow and moisture levels (humidity) in a drum roaster are closely linked to one-another. In the drum of the roaster, airflow affects the humidity, which affects the temperature and water activity, which affects the rate of browning. Therefore, what you are trying to achieve with a given roast pro...
by mcwresearch
October 7th, 2015, 10:23 pm
Forum: Coffee Roasting
Replies: 28
Views: 1790

Fast roasts: yay or nay?

I would recommend you experiment with changing the lengths of individual phases of the roast while keeping the others the same. For example, for one roast, if your normal roasting time is 9 minutes with three equal phases (3 minutes drying, 3 minutes maillard, 3 minutes development), try stretching ...
by mcwresearch
October 6th, 2015, 11:38 pm
Forum: Coffee Roasting
Replies: 1
Views: 270

Masterclass from Rob Hoos

On three separate occasions now I've taken classes instructed by Rob and I highly recommend him as an instructor. I've been in many classes with many different instructors and Rob's style of presentation, his level (and type) of experience, and his obvious desire to help others sets him apart from m...