I finished this design several months ago but never got around to posting the results. Having used Chase Wichert's brilliant Dual Titan carriage for a couple years I felt I could see how to improve it slightly. My goals were pretty simple: Capable of accessing the entire 300x200 build area with both nozzles Modular carriage and extruders. Everything connectorized and easy to take apart Better cooling than the original Dual Titan carriage. This drove me to use a Titan and a Mirrored Titan Easier belt installation, tensioning, and removal without damaging the belts Improved wire routing The picture above shows how the fan wires disappear into the X-carriage. All X-Carriage utility wiring (end stop switch, part cooling fan, and infrared Z-sensor) is routed through internal conduits in the printed carriage. They exit through the top center of the carriage and terminate in a connectorized central yoke or tower. The next photo with the extruder sleds removed show the fan wires disappearing and reappearing at the yoke. Looking at it from the left side you can see the limit switch wiring going into the internal conduit. From the back you can see the Z-sensor cabling going into another internal cable path. The extruder sleds are very similar to Chase' original but with Molex Microfit 3.0 connectors and of course the left and right are mirror images. One thing I'm particularly proud of is the X-belt tensioner. It uses a sort of screw driven rack that can capture the end of the belts and drag it to tension the system. The tricky part is the tiny printed part that grabs the belt. It's shown below on top of USA penny to show scale. The X-motor mount and X-idler (Y-carriages) were both redesigned to maximize clearances so the entire 300 mm wide build area was available to both extruders. So that's my version of the dual direct BigBox carriages.
Amazing work! Do you have some downloadable files for that? A friend is currently considering a Titan upgrade for his dual and this would be perfect for him as an IDEX setup seems to be too intimidating for him.
If you think it will help him, I'll be happy to package up all the files. I'll need to make a custom bill-of-materials so he can see exactly what parts are needed. Once I get that done I can DropBox it.
That would be appreciated, I can't guarantee he would actually go ahead and build it, so there is a chance you'd do it for nothing in that case and I don't want to burden you with unnecessary tasks, but publishing the files would probably be a thing, generally speaking?
I like this a whole bunch. Great work. I'm looking for ways to update my KS bigbox to some better extruders and this looks pretty perfect. Kudos. My only nitpick is my concern with using the connectors for strain relieving the cable. While you'll be fine with the heatshrink, for contacts such as those, 'No Movement is good movement'. I'd extend the wire bracket up to grab the connector on the other side with a zip tie or quick release clamp to eliminate any motion in the connector. Looking forward to seeing the files
That's a very good idea. I'll give it some thought. I am almost done with the BOM. Once I get that done I'll zip up the files for the whole XY system.
Here's a zip file with the STL files, some photos, some notes, and a rough bill-of-materials (BOM) EphBox Mirrored Titan Files I won't be shocked if you have questions
Sooooo... having been AWOL for some time due to an extremely unplanned but very welcome addition to the family I'm finally back to tinkering with my BigBox and I'm going to have a go at building this. My BB has more or less been mothballed the whole time but before then I was planning to install the original Chase dual design, but trying to pick up from where I left off and decipher a 40 odd page thread and work out which are the current parts was proving a bit tricky, so this is ideal. Thank you for the effort into compiling the BOM and pictures, it really looks beautiful and I can't wait to try it out. I think I've got all the bits now and my Prusa Mk3 has been set to work printing the parts so I'll let you know how it goes and doubtless have the odd question. The first one - I assume this design relies on using the Clever3D bed to get max print area? In that case I will have to try to get to the bottom of my adhesion issues with it, as mine has never really stuck too well at all. I am somewhat spoiled now by the magnetic powdercoated PEI bed on my Prusa
Any progress? Just bought a few parts in E3D's store that I think I need to make this so I hope that you have a successful upgrade running by now... One question is why the bed should be needed for this upgrade? I have one but just curious why I would need one to use this?
