The problem with peltier junctions is that they make simply make a delta temp. They cannot provide a over all chilling effect. At the same time, they increase heat in the system. So if you can deal with syncing 3x the heat they would “work” but why not sync 1x the heat instead.
Pelteir junctions sound like a good idea, but practically no one has a real use. They don’t move heat far enough to have real bennifits in most cases.
@Camerin_hahn Actually, what what I’m talking about (maintaining a temperature difference between two nozzles that are very close together, either to make the inactive one cooler than the active or for running dissimilar materials) seems like the perfect application, where you want to keep both sides significantly hotter than ambient, but you want one side to be hotter than the other, and possibly to reverse that relationship as quickly as possible. In this case, you would think of the peltier as a secondary heater for the hot side that also helps maintain the temperature differential.
@Whosa_whatsis I’ve never seen a peltier that is rated for Thot > 200C. Do they exist?
@Tim_Elmore AFAIK, they don’t (or are very expensive it they do), which is why I haven’t tried this yet.
There seem to be commercially made peltiers that are rated up to 200c and sold as thermoelectric coolers (for ~$30), but to get higher temperature than that you switch into peltiers being sold as thermoelectric generators (also for ~$30) which go up to around 300c normally (and 800c in one, slightly more expensive, variation). But I don’t know how well those would work for cooling since it’s not really what they’re designed for. And judging from the pictures, the higher the temperatures you want them to withstand the thicker (and heavier) they get.
so cool. Epecially the cyclopse sounds awesome. Looks like I need to finish dual extruder support in GcodePrintr asap.
that would be awesome if you did (for Mathias Dietz)
what changes to marlin will need to be made also is there a way to quick change in the firmware between chimera and cyclops.
when implementing the dual extruder support on Gcodeprintr could you make that a thing? switching between chimera and cyclops.
i bought the legends setup which comes with both
going to try to make it work on a solidoodle 3 with the stock board and a break out board.
What is the upper diameter of the heat break? I see the stock ones don’t have threads up there and I use an mBot Grid2 with a PEEK insulator design, so that really helps as the nozzle is held to the mount via a grub screw. I need it to be 7mm wide for it to work. Can you give some dimensions on just the heat break? I know inner with ptfe tube is 2mm, what it total outer diameter?