As far as adding a thermal probe, it is pretty easy. The software already is designed to do the line trace. The issue is that it doesn’t record temperature. However, I have a secondary probe that I use to see the temperature and then I take notes. But the line helps in seeing the trajectory.
So it is still a little annoying to use, but I am used to taking notes way back when roasting on a Probat, so I don’t mind. At least it is all graphed out.
Open your control panel and look at where the temperature probes are connected and then look for the open connection point titled “AIR”. Once you plug in a probe it will record the line graph for the probe, no need to do anything for that. You just need a secondary probe for seeing the temperature. RT4 does not show the temperature, it just records a line. It may have had temperature in an early version of RT or something, but I think the improvements made to RT overall make me hesitant to go backwards, so I just run with 2 probes to record the airflow data.
For adding a thermal probe, you might be able to order one from Aillio. I can’t speak for them on what they can or cannot offer in that regard.
The connector looks like a very common connector, so I hope it is easy to reverse look up. Idk if you have calipers to measure it. Pretty standard looking stuff. I could be wrong.
Aillio originally designed it to drill into the faceplate, but I didn’t want to do that, and my readings in the bean chute seem accurate enough to track consistency. Perhaps readings are a little cooler but being in the bean shoot. Also a lot of possibility of the bean chute cap leaking cool air in, so that can throw off a reading if not careful.
@jimmybulletroaster Thanks for the reply !
Is this the port you are talking about ?
Do you know the spec of the thermistor I should buy ? I am a bit lost ^^’
I think I just used the same thermal probe as the bean probe part. You can order that from Aillio.
However, just a reminder, it is just going to draw a line, with NO number value for the temperature. I have to read the actual temperature with another probe.
I don’t have my machine online, primarily to avoid issues and Bugs
But also, aillio doesn’t have an intuitive way to share or upload profile files. They kind of require an all or nothing approach to sharing. I’m trying to keep dialogue with them about this, but they have a small team and focus on the urgent functions and customer support first.
I like your technique, with keeping the drum heat high and using the fan to slow the roast.
Personally, this is a situation where seeing the airflow temperature curve is useful. Whenever the airflow ROR flattens or declines, my experience is that it bakes the roast.
Here you have kept a nice trajectory across all the temp sensors.
The length is long enough that I just run it to the rubber chute plug and measure the air temperature as it exits the drum.
Then in order to get a measurement in F or C, I run a secondary probe. I ran several batches to make sure this did not disrupt the airflow. However, it is not a permanent mod, and as easy as swapping bean chute plugs to revert to the original state. I believe the original design for this involved drilling a hole in the front plate, however, I did not want to do that since I needed two probes to get the temperature value.
The short probe connected to the Bullet graphs a line, but does not record temperature values. This shows the curve over time.
The long probe gives values, but they have to be manually entered as “notes”. This shows a specific measurement at a specific time.
Depending where you position the probe, this is approximately how it will look in relation to the IBTS and Bean Probe. (Labelled “exhaust” in this image)
I use a spare temp prob that I had for my 3D printer.
I have been experimenting because I had some tipping and it was driving me a bit mad.
I subscribed to the Scott Rao class on BH website. And I try to follow the advice of limiting the airflow adjustment.
So if you look at my lasts roasts, I now only use one airflow setting and my goal is to have the ExT peak way before FC.
I am happy to report that I no longer have tipping issues so that’s a win !
Also the FC is way more pronounce, louder, more beans pop at the same time (I don’t know if it’s a good sign, just an observation).
Having said that, it’s still a work in progress, I really don’t like how the preheating works because it’s based on the IBTS and not the BT. At first I was a fan of the IBTS but I found it not as reliable as marketed (again, just my personal opinion).
So next time I’ll raise the preheat temp again, to find a good setting in order to have the desired BT temperature before charging.
Looks like the sensor you use is more sensitive than mine. I mean, half of the probe I use has its metal butt exposed to external air, so I’d imagine your probe is a little more accurate?
Overtime, I am like you, I love having the IBTS, but I don’t solely rely on it.
