Search:

I have had great success printing PETG at 240C/80C with Garnier Fructis Extreme Hold #5 on glass.

Very nice. Thanks for sharing your design.

You could make it even better by printing the spacers as a part of the plate.

Agreed.

I think the hot ends you mention, though are for bowden use. While you could use my extruder to drive a dual bowden system, it wasn't really designed for that. There are probably better...

At long last, I'm releasing the Itty Bitty Double Extruder: http://www.thingiverse.com/thing:566329


3627362836223625

Based on MakerFarm hobbed bolts, Hexagon hot ends and NEMA 14 motors,...

I'll start another thread later today. I'll make early bits available on GitHub, but I'm not ready to put this on Thingiverse just yet.

Sorry. I was trying not highjack the thread. Just search "hexagon hot end" or item 161468746172.

[EDIT: they all sold, so I have no more available.

At the moment, I still have five left. Get them while they're hot! :rolleyes:

Don't get me wrong...I'm glad I have a day job to pay the bills. I sent you a private message. Don't want to leave a link here that will soon be dead.

The dual extruder is coming along nicely. This is the third or fourth prototype. If only I had more time...

3328

BTW, if you're in the US and interested in getting a 3mm Hexagon, I ended up...

The center-to-center distance is 20mm. I think this will work for many hot ends (Hexagon, JHead, Merlin, Magma). If you want something wider, there is a dual extruder earlier in this thread with...

I would be happy to make the critical dimensions available, if someone would like to model it in OpenScad.

I think the extension springs are going to work. I worked for a while on options to use compression springs and captured nuts, but they were all bulky to get the needed strength. The M3x50 screws...

I spent most of the weekend working on this. Here's how the whole X axis assembly is shaping up. I'm incorporating the double groove mount, X-axis platform, hexagon cooling, servo Z-probe and a...

The real issues are around bearing fit, belt length, spring tension, bolt traction, feed channel friction, etc. I'm not really worried about the motors.

That's the idea.

I need to get the motors in hand and fit it all up, but I think I will need to move the whole assembly about 2mm forward for it to clear the Z nut traps.

Here are some photos of the first prototype print of the block.

3187318831893190

Now that I've had a few months of positive experience with the Itty Bitty Belted Extruder (http://www.thingiverse.com/thing:389105), I'm working on a double-extruder version. This is just a...

Ahh...that makes sense.

There does seem to be a lot of variability in what people are able to print. I forget sometimes that I've got a lot of mods on my printer and nine months of upgrading and...

Actually, it's exactly the opposite. The gears multiply the torque, so the direct drive extruders shown in your photos have less torque. The diameter of the hobbed drive pulley makes it even worse...

Actually, another extruder behind the rails would strike the frame on both sides.

I'm still thinking. Y separation is interesting to me as well, but it would have to be in front, which adds more...

I'll be curious to see how it works. My gut says that the larger Nema14 is getting pretty close to the limit, but it's definitely worth a try.

I've been wrestling with a design like this for a while, and had concluded that the only realistic way to make it work would be to get the motors up above the filament clamps. Good job.

Are those...

I used the 1/4 inch size.

It depends on your electronics and the current settings of your drivers. There's more information in this thread:
...

I actually did this with my i3. The Travertine drills easily with a masonry bit. I eventually abandoned the zip ties when I added the Sorbothane feet.