Greg's Hinged Accessible Extruder
by GregFrost, published
The idler is now hinged using an M3 screw.
I have also added support for the central part of the 608 idler so that there is no need to use washers to space the bearing away from the plastic.
I have been using this design for a while now and love it.
Changing filament is a simple as compressing the spring then whipping out the old filament and poking the new one in.
UPDATE: 6 Aug 2011 - Add arcol (cory75 thing:10532) and wildseyed hotend mount options. Im not overly happy with the asymmetry of the arcol option.
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This is a great design, and will be replacing the stock "Steve's Extruder" on my Rostock as soon as I get the hardware together. My only gripe with this Thing is the amount of searching I had to do to find the hardware list necessary to assemble this. You'd think that'd be easier to find, considering that you can't build one without that information.
Do you think you could include a list of required hardware in the Thing Info, just for the sake of having that info in one easy-to-find location?
I'd never noticed this but there's an error in the scad. I've rendered many Greg's accessible extruders and was always irritated that the holes for the motor still had to be drilled through, and the hole in the center where the hobbed bolt goes needed to be awkwardly drilled through the bearings.
Yeah. That's because there are references to a variable called "layer_height" that doesn't exist.
There is a "layer_thickness" variable set to 0.4, but no layer_height. I set it to 0.4 as well, and sure enough, the motor holes now go pretty much all the way through and the hole in the center where the hobbed bolt goes is there.
Rather than upload a derivative that fixes this, I figured I should post that here on the original part. Maybe Greg can upload a v4 within this thing id (I know 8252 by heart) to fix this problem.
I appreciate the advice, I did try locking an outer nut against it but figured it loosened since in practice the extruder locked up, and in theory during forward rotation the large gear would want to break away from it by moving toward the extruder. It'd be difficult to tighten an inner nut against it given the narrow space. Maybe I have a different problem, but I can't imagine why else it would extrude normally for several minutes and then become slower and then refuse to move at all?
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simply call the wade module like this (which is how the included stl was made):
If two mounts have compatible holes, you can include the holes for both like this:
Once it is printed, you will need to trim off the little support piece for the idler hinge and drill the support membranes from the hobbed bolt hole and motor mount holes.
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