Got an email from Reprap discount about their new indigogo campaign for all metal extruders. Seems like a nice bit of hardware but they ain’t cheap…
https://www.indiegogo.com/projects/bulldog-extruder-project
Is a Nema17 necessary? Seems big and heavy - mine has a Nema11.
It looks heavy, but may not weigh much more than the geared stepper I got from MakerGear. I like the big drive pulley. That does seem less likely to slip (more teeth engaged).
I don’t think you’d want to use these for anything other than Bowden, too Damn heavy. The price just seems prohibitive compared to the seemecnc ezstruder for $31 without motor- http://seemecnc.com/collections/parts-accesories/products/copy-of-ezstruder-cold-end-kit
That ezstruder looks nice - does anyone know if an e3d hot end fits into it?
Standard J-Head mount so it shouldn’t be a problem.
Those prices do seem a little steep, but if every piece of their extruder is being custom fabricated (including the gearbox) then it’s not quite so strange.
I wonder if it offers significant advantage over any other geared extruder. I wish they’d release the drawings before the campaign ends… But maybe I’ll just have to wait, get a good look at those, and then decide.
Yeah I like the idea of nema 11 with the integrated metal gearbox for direct drive. For Bowden I suppose weight doesn’t matter! I wonder specifically what it is about this design that makes it less likely to jam, I’d have thought that was down to the hot end!
@Liam_Jackson Grabbing power of the driving toothed pulley/hobbed bolt, driving power of the extruder, and space for the filament to buckle within the extruder will also contribute to extrusion failure that acts more or less like a jam.
@John_Ridley Exactly my position too, wades works fine and if something gets broken it’s free to replace!