Hi everyone,
We are almost at the end of October, and it's been a busy month behind the scenes here at Fluxer Heaters. I want to give you an update on where things stand with the various Fluxer projects.
The Flite:
The Flite is shaping up to be a
great little heater, and I know you will like it a lot once it's ready to go.
Physically, things are pretty well set. Everything fits, and the result is a tight, solid build.
Functionally,
@TommyDee has been helping me - or maybe I'm the one who has been the helper, lol - and we are getting closer to the correct recipe of inductance, capacitance, and work coil values to achieve the best heating performance and battery life we can. On Monday I sent him the most recent build and a selection of components to evaluate, and we are both hopeful that we'll have the right formula worked out very soon.
We've narrowed the choices to a few contenders in each of three categories: inductors, capacitors, and work coil size, and the final step is to test these in each possible combination and see which recipe emerges as the best overall.
The complicating factor, and one that I think took us both by surprise, is the variation in the circuit's performance when heating a lightweight ti tip vs. a slow-to-heat boat anchor like the 20M. This circuit makes the most of what it has to work with, and it needs to wring every erg and joule it can from the 18350 batteries. It's been challenging to find the happy medium that heats well and is also reliable. I have learned A LOT MORE about this circuit in the last four weeks or so, and this is after being pretty familiar with it for the last several years. It's been a
very enlightening month.
There is more range in the Dynavap product line than you may realize, and there's also more ability to tune the IH circuit than I realized. "The more you know," eh
The TL;DR for the above: We are still testing a few components to find the best configuration. We are almost there, but we likely need at least one more week to test various component choices before we land on the correct configuration.
Other relevant news: I am still waiting for the cases to be made and shipped. That should happen within the next two weeks. I'll keep you updated and let you know as soon as I learn more.
Price:
I'm still working on this. The configuration has changed quite a bit since I posted the "sneak peek" video a few months ago, and it isn't quite done yet. The Flite now has a lot more functionality and value than it did in its original configuration. It's also taken more iterations to reach this point than I expected it would, and as a result my development costs have been higher than anticipated.
Lastly, I recently found out that the rules around shipping Lion batteries are more permissive than I realized, and that it's legal to ship a few battery cells with a device
as long as they are pre-installed in the device when it ships. TIL. Now that I am aware of this, I'm working with a battery vendor to purchase some 18350 cells in bulk, so I can offer together a "turn-key" package of the Flite, batteries, and a charger. That will be the top end, and the price for that package will determine the prices for less complete packages I offer "below" it. There's a delay at the moment as I need to complete some add'l paperwork for my resale license to finalize the bulk battery purchase price, and
that paperwork is waiting on some other tax paperwork I'm expecting from my CPA. All of that will be settled soon, but that's why I haven't finalized the Flite's price(s) yet.
Stay tuned! The final stages of development are usually boring from the outside, but as I learned with the Flix, they are absolutely necessary for a successful product launch. I'll be back with more info soon!
Flux Deluxe v2 (FDv2):
The latest on the
FDv2 is that I received the first set of FDv2 circuit boards last week. Unfortunately, the first set of circuit boards had a few fitment issues that prevented me from assembling a working heater, but I am hopeful the next set will be better. That "next set" of FDv2 PCBs are on their way to me now and should be here by Friday. I'm hopeful they'll yield a working build. I'll keep you posted.
Flix:
I am cautiously optimistic that I've finally cracked the mystery of the Flix's MOSFET issue, the one that has frustrated me and more than a few of you.
I discovered a clue I while I was testing the Flite: I observed that the heater circuit takes a "big gulp" of electrical power as it begins a heating cycle, but what happens next depends on its power source. When the heater is powered by batteries, the batteries limit this in-rush of current to some degree, and this keeps a minimal amount of electrical energy in all parts of the circuit. However, when the heater is powered by a mains adapter, the adapter is more efficient and thus capable of delivering
a lot of energy to the heating circuit almost instantaneously. This initial in-rush of current comes
so quickly and
so strongly that it can deplete the capacitors, causing the MOSFETs to instantly die.
This was especially evident when heating a heavy piece like the 20M.
The solution has been to alter the formula of capacitors and inductors to increase the capacitance and also slow down that "gulp". This seems to solve the root of the problem, which has always been my goal.
I have been slow to make more Flix while I wrestled with this issue, but testing is showing me that I now have a good formula, and this is the correct solution. I am not sure this will solve things 100% of the time - solving for 100% of anything seems unlikely - but starting with more capacitance and less inductance should make the Flix
much more reliable, which is the goal.
I will be adding another batch of Flix to the store soon, and I'm hopeful this new configuration will prove to be more stable.
Going forward,
if you are a current Flix owner and your Flix is working, please continue to use it as you have been. There's no need to change anything unless it stops working.
If your Flix does stop working and you send it back for repair, I will repair it with the new capacitor and inductor configuration.
OK, that's the latest. A lot of jibber-jabber, but hopefully some good stuff in there, too.
I'll have another update later in the week after I receive the next batch of PCBs from the manufacturer.
Cheers,