Does the extruder use two steppermotors or just one? If it uses two, then it will still be pretty heavy in comparison to using only one (I think everyone gets that), or a set up using two smaller motors. I thought I have seen a few designs where only one motor is used for both extruders. Then this would make sense in decreasing weight of the X-carriage. The reduction of the width to get the use of the full build plate is of course still very welcome. From what I remember, in the campaign many people were worried about the weight of the dual extruder as well.
Looks nice indeed. May have to go dual. I wonder if anyone ever looked at a combined direct / bowden setup? Which is to say a Bowden motor on the back to push the filament through and then a second, tiny, motor on the print head to pull at the same time. Living with a Bigbox I do now look at the light twitchy movements of the UM with fascination.....
If I remember correctly, Livi had hers setup at the show as a hybrid of sorts. Extruder #1 setup was in a Bowden config and then their new extruder running direct on extruder #2 with a smaller stepper to boot.
Here's their recommendation for the smaller stepper with similar torque. Might have to go ahead and get a couple on the way Never really had any issues having a bunch of carts sitting around before getting the horses lol. http://e3d-online.com/NEMA17-40Ncm-D-shaft
would there be any reason to run normal direct drive like on a stock BB, and 1 with the gear reduction? If its that much better wouldn't you run dual on a dual machine?
https://hackadaycom.files.wordpress.com/2016/03/mrrf-panorama.jpg Not sure if Hackaday cares if I post their picture of not, but thought it was a pretty awesome panoramic shot of the MRRF turnout. If you were there on Saturday, it makes for a fun "Where's Waldo" game finding yourself.
I think the idea would be for ultimate weight savings of your carriage and the speed, accuracy and quality benefits that come with that. You could run a bowden setup for your support material for example and then the Titan for your main filament choice. This would cut the carriage weight down to the just the weight of the single smaller stepper of the Titan.
I have no idea how I managed to avoid being in like any picture at MRRF! Dual Direct Feed is a bit overkill IMO. Only time you'd really want it is if you're trying to print dual flexible materials That sucker gets hot
Thanks for the footage Mike. What's that printer at 9:52 about? 4 lead screws on pulley off couple motors? I hear the printer shown at 14:52 is pretty good as well.
Yeah I'm not sure on that one. Never saw the owner to talk about it. 4 lead screws and used the aluminum extrusion as the linear guides. That one at 14:52 is pretty good, but @LiviLammister is probably still sour they sold it
I will never forgive them for selling my printer. Luckily I scanned it before hand, so I just printed it on my universal molecular assembler the next day
Oh, for those of you interested, this is the motor I had on the direct drive extruder. http://www.omc-stepperonline.com/ne...or-35v-1a-13ncm184ozin-17hs081004s-p-101.html I'm not allowed to say much about the Titan. However, I think I can get away with saying that (as you could see at in the videos) this motor + Titan gets the plastic through the tiny holes
@LiviLammister do you have any idea when we might get more info on the Titan or is that still a complete unknown too?
NoviceExpert on youtube received one and is going to do a video on that soon, so you may here about it first from him over anyone else.