Forum > Data Logging
Artisan Spike Help with ROR
alejandrooo:
Thanks everyone for their help thus far. First few roasts went well other than the ROR/change in BT readings, which even after reading about other people with Artisan spike problems here or other forums, doesn't seem to have an easy solution.
I'm using a Variac (for exhaust fan) that's plugged directly into an outlet or a power strip (tried both). My other cooling fan, and motor power cord is plugged in. Using a MacBook Air that's not connected to an outlet (just battery), and I have a Phidget, which seems to be set-up properly with its other readings (BT, ET, MET), and its settings are those very helpfully outlined by Susan's guide: https://drive.google.com/open?id=0B4HTX5wS3NB2SmZua2VSd2FjZFE. I made sure red wire is left in numbered slot and black to G.
Here are some photos of my set-up and first few roast graphs:
https://goo.gl/photos/Z3rDKTrYCym7dRfa8
As well as an Artisan graph when I had no beans and was just trying to isolate the issue (e.g. plugging Variac directly into wall 3 proned socket, upgrading my Artisan version to Artisan 0.9.9, etc.).
https://goo.gl/photos/VcfeHSemvdPDwMXC9
Anything stand out I might be doing wrong or that could fix this? Really hoping it's something boneheaded I did and easy to remedy, but open to testing whatever and get into the weeds to resolve it.
Final note: I don't think it's grounding because I'm not letting it touch anything metal that would then connect to ground (I'm set-up on plastic table). The wires are intercrossed a bit if that's a problem though as you'll see in photos.
SusanJoM:
I don't think it looks like a grounding issue either. It looks like maybe you are taking samplings too closely or not applying a reasonable amount of smoothing??
What does your Tools > Extras page look like?
And what is your Sampling Interval.
alejandrooo:
Thank you for the help, Susan. Here are my settings:
https://goo.gl/photos/wVcMriGaPkUEKo9CA
https://goo.gl/photos/JcvNBZiGyYQG6td16
SusanJoM:
Well, try changing your Smooth Curves from 0 > 1 and seeing what the curves look like then. You can use the data that you already have (as in open the current profile), make changes, and see what it does on the screen. My settings on that page are Smooth Curves = 1; Smooth Deltas = 2. Just play with those settings a bit and see if it gets easier to read.
And maybe read this
https://artisan-roasterscope.blogspot.de/2014/01/sampling-interval-smoothing-and-rate-of.html
alejandrooo:
Thanks, Susan, I'll give that a shot.
Do you guys have any other ideas that might help identify potential issue?
And maybe most importantly, how can I best troubleshoot...should I turn on heat and motor and from there test what happens when I turn on fan or move kPa, etc.? Yesterday, in my third roast, I tried creating a stable environment with no beans, motor on and very low kPa and airflow, but that still saw the ROR jumping around quite a bit (more than a normal variance of 5-degrees plus or minus), which is why I'm convinced it's something electrical or beyond my technical knowledge.
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