Here's my honest review....
I've had my IN6 for (what feels like) forever - and I've manufactured 10's of thousands of boards through it. Is it a great oven? Yes and No.
It's the largest (only) conveyer oven you are going to get that can run on a single phase, pulling less than the Max current you can "legally" draw in most residential places. That's a HUGE win as I don't have 3-phase.
But the 2 downsides of this is that (apart from super long heat up time, which is a 3rd but minor downside) - is the oven can barely reach and stay at max temp (limited to 300deg in a single zone) which means using commercial grade paste (SAC305, GC10, SN100C) etc is almost hit and miss, and if you have a large panel, or a real dense panel of parts, the oven just can't keep the temp maxed and drops considerably on large-ish (150x150 and up) thermal mass boards.
The second downside is due to it's size (or shortness) - it has terrible zone leakage and cannot support zone temp differences of more than 120deg - and due to the nature of it's design, those deltas are needed because to get a PCB to 235-245deg C for the final reflow stage of the profile, your oven has to be set to 300deg.. but you don't want to go above 165deg in the soak stage or you'll burn your flux off too quickly.. and if you leave the IN6 on for more than an hour the middle zones can creep upwards of 30deg.. meaning you're entry zones also creep and all of a sudden your nicely tuned profiles are not so nice anymore.
This oven is definitely "BEST IN CLASS" for a conveyer that doesn't require 3-phase and massive current... but it's also the only oven in it's class that I can find, so take what you want from the "best in class" award!
My oven is also mostly orange inside now, due to the reflow process. I just changed my chain yesterday to a brand new one as my original one was terribly discoloured AND covered with flux/paste debris from peg holes in parts like USB connectors. We'll see how long it takes for my shiny new one to look the same.
During winter, you'll likely run into earth leakage shorts due to moisture in the heating elements. I suffer from this, and I know a few others that also do. I have a set of 3 profiles that are designed to slowly bring the elements up to 150deg in stages, that prevent tripping the power. It takes hours to go through this process when there's an issue. Apparently this is not super uncommon with cheaper ovens, but it's a total PITA when you need to do a production run of something but have to waste hours heating up your oven so it can heat up itself! Doh!
I'm not upset with the IN6 - it does work reliably, most of the time. But you need to assess what you plan on reflowing in it before you purchase because it's not quite capable of doing high temp unleaded on anything bigger than single PCBs or small panels.
Happy to answer ay Q's anyone has.
Cheers,
Seon
Unexpected Maker