Hey BigBoxers! So, I have this dual hybrid B.B. converted to IDEX using Greg’s Bowden IDEX conversion but replacing the Bowden Titans for 2 remote direct drive Zesty Nimble extruders. But I never liked the ooze shield or purge tower or (sorry Greg) Greg’s oozeless ram purge script. So, I added some silicone rubber wipes running along the sides of the bed and a stainless steel plate under each nozzle where they park when not in use. This way the filament does not bleed out while idle because it is blocked shut by the steel plate, and the silicone rubber wipe keeps cleaning the nozzle every time the nozzle moves in either direction; either going to print or going to idle. The result is a clean print and zero bleeding from the nozzles. Still running tests but as you can see it looks pretty good! See video please.
This is TOO much! every time I get a plan to improve my BB along comes another mod !!! Only kidding !!! great idea, and fascinated to know that the ooze problem (normally a quick flick with a bronze wire brush, then let it print a perimeter to get things flowing) fix works so well.
The wipes are superglued to the rod caps, the steel plates are attached to a 3d printed piece that screws to the Y carriages, I just drilled a vertical hole centered between the belts to attach them with M3 screws..
Another one to add to the ever growing list of mods I'll get round to eventually. Very nice job. Thanks for sharing
I have a question about your implementation: - I printed out your ooze blockers and the nozzle in my setup is about 5 mm lower than where the flexible metal plate attaches. Does the design you made line up with the nozzles in your setup? If so, I am wondering why the hot end isn't mounted higher up in my setup. Thanks!
The metal plates bend down and back to horizontal to match the height of the nozzles. Just use needle pliers to bend down close to the printed part and then back up a little closer to the nozzle. Look at the video, You can see the bend on the plates quite well.
What are you using for metal plates? I will be working on the same conversion as soon as my direct drive lead screws come in (taking longer than normal to get here ). I wanted to first get rid of the banding before starting on printing the parts for this. Any tips on the config settingsfor the Diet?
I used some parts from an old computer case, they are part of the hard drive sliding tray I believe. See pics.
Here are some pictures to better show the whole thing. I drilled a hole down the center or each Y carriage, right between the 8mm rods and away from the edge just enough to make my 3d printed part go flush against the edge. The steel plate was cut and bent to fit just right and at the right height and screwed to the bottom of the part with 2 M3 bolts and nuts. That’s it. I am still with my factory RUMBA so no idea what to do with Duet. By the way, I use Polymaker polysmooth filament as support material with PLA, it works FANTASTIC! I set support to zero clearance between the part and the dense support structure and the end surface is better than the top printed surface now!
WOW! Very cool idea. I always though about an ooze control with blocking the nozzle. Just opened my old empty Chieftech tower and voilá I have those parts too in there... Going to adapt for the rail IDEX setup with my servo wipers...
@gonzalo so just another question, your are not using an ooze shield or and prime tower as you pictures show... Are you just moving the idle tool to the outside over the ooze plug when switching tools so just a simple switch of tools without doing anything with the old or the new tool?
Correct, nothing added, just play with tool change retraction and coast and z lift. The added benefit is that the nozzle is not emptying while idle so the nozzle stays primed. I am using very low retractions, around 1mm work for me. Watch the video at the beginning of the post, you can see that nothing happens on the tool change.
