Small footprint J-head quick fit extruder
Description
The intention is to make an x-carriage that will take two of these either nose to tail or, if I can work out how to do it, mirror image.
I have rotated and moved the motor to allow the rear mount to be moved closer and shorten the whole baseplate, and should make it possible to mount these forward to back on the x-carriage.
Also has the standard 50mm spacing mounting screws too so will replace any standard extruder.
Quick fit latch here: thingiverse.com/thing:31528
Instructions
This is now a working extruder so I have removed the work in progress tag. Use the standard Wade gears from one of the predecessors.
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I am having trouble printing this. I tied slicing with both skeinforge and slic3r with the same basic issues. First, the face down bearing opening offers no support for the smaller opening above it. I can get around this by generating support with the slicer. The second problem is bigger. The part that the idler connects to is also printed without any underlying support. It looks like you started to have something there, but both slic3r and skeinfirge render this as hollow which means 1) that it offers no support, and 2) the slicer does not know it needs to generate support.
You don't have source for this in anything usable do you? heekscad is by their own admission defunct, and it does not appear that freecad can open this type of file. I've printed virtually every other piece I need for the OB1 printer; this piece is giving me fits.
I have uploaded the latest version of the body as well as the same file in STEP format which seems to be the only default file type we can all read. There is support material built in and it slices correctly on 0.9.3 Slic3r for me. Good luck and let me know if it still gives you grief :)
I wish all cad programs would use the same file format or at least put out in a step format so designs can be moved cross platform more easily.
I made the idler part longer on this than the original for one so I would guess that these parts will only fit for my extruder. All the parts you need for this extruder are here in any case. The .heeks files are for HeeksCad for anyone who wants to modify them and the STL's of course. The idler gear is held in with a 20mm length of 8mm smooth rod, it just snaps in place and stays there.
I fully intent to use all printed parts from your design. I was wondering only for the bearing, and the bit that grabs the filament. My motors have a smooth shaft without that flat spot on them. I might be able to put one then I can put a set screw instead of a rod I'm thinking. Does your motor shaft have a flat portion to it (key)?
Thanks for the replay.
Sorry to bother you again. I made this extruder and was wondering if i could use the parts from there on yours.
http://www.thingiverse.com/thi...
I am not familiar with the .heeks file format of your parts. Also is the idler gear held in place by a setscrew type thing?
I'm building a new printer and i want a diff extruder then the UM, hence why i like the compact one you made which i will install on a X carriage I will have to design. Makerbot style
Minor mod to the idler, raised the top slightly. Deleted the previous version to avoid confusion.
5 more iterations of idler and finally got it working right, once again I have deleted all the old files and just left the ones that work. Now to get on with the carriage...
really liking the look of this design ! and the idea of having 2 on a carriage will be amazing . printing out now to have a try later.
nice work, You may recheck tilt screws. they need more clereance upward and doesn't work best on my design
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Corrected body STL uploaded, had a support material issue. I have deleted the earlier version of the body to avoid confusion.