Zeno

Wow, i like how he modded it in such a tiny place and with the in stock metall parts. The acceleration of the x&y- axis dont work against the springs... perfect. Sadly the UMO don't have an active cooled hotend that could be modded this way.

Thx for bringing in new ideas . A spring meachnism would be working good too. I like the easy adjustable force which can be reached with switching only the spring. I have to put down a link from a german spring shop where you can get almost every spring: "Spring Shop" and even get all technical data and the CAD files . But one thing i like to keep on using the magnets is that the trend of the holding force (force/way diagramm) is exponential compared to the mostly linear trend of a spring. Her a some diagramms: I want to use the extrem high holding force to fight against the high accelaration of the X-axis to prevent for a swinging printhaed during the printing. But it would be looking great too:

great sketch, I can see all details np. Maybe you can use the "snipping tool" if you're an windows user. (search for it and put down a link in your task bar). After activating snipping tool you can marke your image after this it's already in your buffer ore you can save it as an "png" file for the forum.

I made the experience as an designing engineer that you get better results (keep it simple) by talking to a team which gives you total new ideas! Perhaps you´re kinda get blind for it more and more when you get closer to your own approach

Mhm, lets call them "nozzle masks". Yes, but i prefer a softer material like high temperature silicon toned in a mold, to prevent the nozzles for weareout. Trying to do only the standart retraction for the filament (except for the material which dont like to stay a bit longer in the nozzle).

All red parts are neodym magnets (inside the transperent green parts the red ones are more orange), the orange parts are dumpers mounted with the magnets on a adjustible base to calibrate the nozlle hights. atached some photos of current print status Maybe i can finish the mechincal work on next sunday, but i could need help with the software / firmware part. I want to use the sripts which can put into the toolchange scripts in simplify3d, but i don t do something like this before.

Hi Deto, you want to turn the head by servo?, do you know how to trigger a servo in marlin? On the first try i want to do the switching with the x-axis, arms and ramps, but maybe after this we could do a servo mod if you want.

Thx drayson, the dimensions are quit well i only loose in X-direction about 7mm (compare to single nozzle) because of the rotation. The rotation is from side to side 24° (12° left / 12° right). In Y-direction i loose about 20mm (maybe i can optomize this down to about 10mm). The position of the print state / the rotation of the half print head is secured by magnets which can be adjusted- sliding around the X-axes centre (ill upload more screen shots soon). I don t compare the weight of the original printhead to the new design right now, but based on the dimension and the fact that the most parts are printed in PLA (axial bearing too - (only balls are steel) ) i think it isn`t much additional weight. Greetings Zeno

Hi there, i am upgrading my ultimaker orginal from standart dual extrusion to a rotary printhead. I got inspired of the rotary printhead long time ago but i did never started to design my own one for the ultimaker till now. here are some videos which inspired me: My goals are: -having fun -no oozing -fast switching between heads -very light printhead to keep the accelaration high -printing without prime tower, ooze shield... to save print time -using magnets for rotary fixing -using the x-axis to switch between the heads -get a easy to print design in the end so anybody who want it can print it -integrate e3d v6 hotends -upgrade to e3d titan extruder (not on the printhead) -customise original firmware -generate printing profiles I already redisigned my first dual head (never printed only disigned) to version 2 Old design: New design: -new bearing rotary axes -more magnets (clamping of the hotends fan duct) This only the beta type to try out the mechnical characteristics of the rotary axis. I already printed 75% of it, pictures coming soon Feel free to ask questions, and of course if you have further ideas tell me. Greetings Zeno