I’ll start with the one that’s the least obvious, but likely most helpful…
#1
Heater. I realize there’s some pretty big design issues involved in making this feasible, but having the ability to heat up the IPA, or whatever’s in the Wash bin, makes a HUGE impact on migrating the resin off the nooks and crannies that are hard to reach by simple dissolving action.
In fact, i sometimes end up preheating the print and platform with a hairdryer before the Wash, because even 18-19 degrees C is enough to make the resin viscous enough to cause problems and require unnecessarily long wash times. Heating it up to 25-30 degrees makes a very noticable difference.
Obviously, this would require a way better sealed system (see #4), and some way of ensuring the (electrical) safety of the heating element (hot air blower wouldn’t do much for the huge thermal capacity of the IPA/whatever in the tank).
#2 & #3
Cycling and platform rotation. For smaller parts with complex topologies and lots of holes i often end up using a 5-7 minute wash cycle, then let the part dry out a little still on the platform, then rotate the platform 90 degrees, then do another 5-7 cycle, then another rotation, then final 5-7 cycle. This ensures that the flow of IPA hits all surfaces about equally, and i’ve noticed the results are much better than a single 15-20 minute cycle, and with less risk of bloating/deformation.
Again, this is mostly true only for tiny, complex parts, although it can also be beneficial to parts that have a large footprint, but are mostly hollow (e.g. enclosures), in which case some of the walls often end up in a “dead spot” of the vortex.
Cycles like this (wash, wait, wash, wait) are purely a software feature, so there’s no potential issues there, but rotating the platform automatically would introduce additional complexity, cost, and increase the size.
#4
Sealing. This horse is obvious, and has been beaten ad nauseam.
#5
Presets. This goes for cure too, and since it’s a software feature, that shouldn’t bee too difficult to implement (apart from UI design), i wonder why it’s still not there.
#6
Splash guards. Parts with drain holes that are slightly angled can sometimes cause a huge mess, as the IPA draining from the parts ends up arcing or splashing over the edge of Wash and all over the table, after the platform lifts. It’s a fairly rare occurrance (in my case at least), but when it happens, it’s annoying as hell.