Brutstruder
Derived from
Description
Brutstruder is a hybrid of many successful current extruders. It get's its idler wheel from the Wades Extruder thingiverse.com/thing:1794, and the drive gear from the Mk5 Plastruder thingiverse.com/thing:3290">. It also get's a viewport from the Printruder II - Rear Breech Loading thingiverse.com/thing:3178, it's Electronics board holder from the Prinstruder II thingiverse.com/thing:1980, and it's legs are 2 of the DINO2 from Zaggo's Printable extruder holder thingiverse.com/thing:1912.
This design has been endurance tested in multiple ways.
I made the extruder lift 27 lb of water (this was before adding a 4th spring, and going to harder spring, no telling what it would lift now).
I fed it 3d Ink Plastic only throughout testing.
I have printed 36 hours straight with this extruder at this time with 0 failures.
I also fed it 1/8 inch ABS welding rods from the local welding shop.
Now you see why I call it Brut.
Instructions
First print the Idler, and the Makerbot block, attach your motor with the Mk5 drive gear on it (the gear will be tight, and the grub screw will eat out a track for itself as it spins. Spin it 2-3 times to grind a track before assembly). Once the drive gear is attached use 2 25mm m3 screws to attach the Kysan gearmotor to the block. Place your 606 bearing firmly in the hole provided.
To attach the idler, you will use 4 50mm m4 screws (the same as a Wades Extruder), the order of assembly is bolt, 1 washer, idler RP, 1 washer, 1 15mm spring (the harder the better), and a 3rd washer. Thread the m4 bolt into the block and secure them to the m4 nut on the other side.
Just screw the hot end into the block and secure it to the 2 captive m3 nuts.
The mounting legs for this extruder are Zaggo\\\'s thingiverse.com/thing:1912, but just print 2 sets of his Dino 2 legs.
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Thanks a lot for this great design.
I swapped my MK4 for your brutsruder and I love it!!
tried to run more of the 3dink "plastic" through the brutstruder after printing with makerbot plastic and it failed within 15 seconds of putting down a raft (it hit a spot in the plastic and the mk5 gear started spinning, plastic stopped getting extruded). i was able to print a huge flawless keypad case with the brutstruder and makerbot plastic. easily a 2.5+hour print and 90x90+ size. I will try another roll of it (i got 3 total) i really wish i knew the trick to get this junk to work. i can literally print for 30 hours straight with makerbot plastic with no issues with the brutstruder or printruder2... i cant figure out what is wrong.
So far, liking it a LOT!
I'm printing in PLA (mostly successful, but with a few dropped patches) and I'm trying to sort out whether I have an under-performing power supply, some sort of freaky voodoo emf noise, or over-tightened springs. Are there any clear clues to indicate, "um, yeah, those springs are cranked waaay to
o tight..."
What springs are you using? I'm about to order some stuff of off McMaster so I might as well add the springs to my order and upgrade my extruder. I don't want to use springs that won't work well so if I could get some pressure range that would be good for the extruder.
My idler wheel cracked and I managed to patch it up just enough to print out the Brutstruder and mounts. It's working excellently. I don't have springs however, just tightened the M4 screws against a 2mm metal rod.
Has anyone tried PLA with this extruder yet? I'd be worried that it would pinch it in half!
Does this mount directly to the Mendel? Or do we need an adapter, if so, is there one on thingiverse?
Printed one and cleaned it up (took a bit of work) and then realized my X axis was inverted, and the part is backward. Printing a new one now. I wonder if I could use the stock makerbot idler wheel bolt....
Congrats on finally posting this mate!
It really is compact... further miniaturisation may not be possible! It's time the community gets working on a shorter hot end lol!
Any ideas on reducing the vitamin count?
Ohh yes, something fun is on it's way http://www.makergear.com/blogs... We are going to need new legs :)
Ohh I could take the chafer to this design and get rid of 1cc worth of plastic, but I think your right, we are approaching the limit of the material, which is a good thing.
Vitimin count?:
2 m3_25mm
2 m3_50mm
2 m3 washers
4 m4_45
4 m4 nuts
4 10-15 (depending on how hard, harder the better) spr
ings
mk5 worm gear or the brass knockoff off ebay
Hot end of choice
I think this is the lowest vitimen count of any extruder also.
Very cool. It looks like it would work great for plastic that varies in diameter a little bit like the stuff from 3D ink. I think that I'll try it out while I'm saving up for the $120+ for the steppers from kysan and other parts for Wade's extruder for makerbot.
Nice work, I like it. These DC gearmotors are still open loop though, right? Do you find you need to re-calibrate them over time, or is it still the case where if you run it at full power the speed is fairly constant?
More from Spacexula
Could this be adapted to 1.75mm plastic?