I just stumbled upon this thread. I have a functioning DWG printer that I designed, and has bee running for 4+ years now. Here is the Github repo with CAD (The main CAD is in Solidworks, but there is a subfolder with STEP files) https://github.com/pjoyce42/Pulley-Z-axis. If you're interested in more details, I can share pictures, and answer any questions you might have. I've found DWG to be a veby pjoyce42 - CoreXY Machines
Quotedpharris I had a similar thought re mounting GUS in Lisa. GUS build height could be more easily increased with a elevating base. Maybe another silly question ... Can GUS's arms reach below the ground plane? Could we increase the printing height by mounting the base of the arms above the ground plane? theoretically there is nothing to stop GUS from printing a depth below the plane neaby pjoyce42 - Delta Machines
@dpharris: I just checked the GUS arms, and they will fit on the Twoup with no problems as long at your print diagonally. As for the OneUp, it is not at all possible to print the GUS arms without major redesign, and breaking them into 3-4 sub-parts. As for the LISA Simpson you could easily print the arms in two pieces on the OneUp, and then couple them using some embedded nuts and threaded rod.by pjoyce42 - Delta Machines
@A2: Thank you very much for the summary. I have a pretty good idea of what would be involved with building a Simpson, I just wanted to get a definitive answer for myself, and others. Thanks. @nicholas.seward: Thank you as well for the summary. I do feel that Simpsons will be a great beginner printer, and I feel that a 1 year timeline is a good goal. As for me getting a first 3D printer, I willby pjoyce42 - Delta Machines
So now that the files have been released for GUS, I have one question: Is the GUS Simpson a viable option as a first 3D printer? Why or why not? Obviously I know things are still in the beta stage, but I'm thinking about once the rough ends are fixed. I really love the simplicity of the design, and I have no doubt that it will become a popular design given the high percentage of reprapable partby pjoyce42 - Delta Machines
QuoteGuizmo I fail to see how the arm bases can rotate. I see that the threaded rod would make them shift Z position, but they also need to free turn on their own Z axis, how do you achieve that? It looks like the arm rotation is achieved by simply having the tracking nuts rotate on the threaded rod. This should be effective, but the Z-shift associated with the XY rotation needs to be accountedby pjoyce42 - Delta Machines
Do yourself a favor and take a look at CoreXY. I've actually been looking at desiging a printer based around the v-slot extrusions, and corexy seems to be the way to go because it helps to minimize the moving mass. Additionally, you will get much better results if you have the two center beams parallel with a gap in the middle for a gantry. The way things are right now you must keep the two movinby pjoyce42 - Extruded Aluminum Frames
Be careful with repcrab, because it could very easily turn into repcrap. I do like the logo though, very cool.by pjoyce42 - Delta Machines
I realize this an old post but here are a few thoughts: First, would be to make sure that the motor is not broken. Second, would be to make sure that the motion of all the pulleys isn't cause huge friction build up. Third, have you checked that everything is in proper alignment. Fourth, what are the specs of the belt drive; if you are bending it too tight then you can induce excess friction. Iby pjoyce42 - Mechanics
An 8' tall 3D printer would be pretty freaking awesome to see. If you got a big enough 3D scanner you could print 1:1 human replicas. Out of curiosity what is the space efficiency of Simpson (I.e. How big is the printer vs print volume)? It seems that a lot of Cartesian 3d printers have relatively small print volumes compared to the total structure volume, but Simpson looks like it does a prettyby pjoyce42 - Delta Machines
Thanks for the update. Its always good to flesh out these issues before making a full release. Luckily it sounds like this design is fairly resilient over all. I can't wait to see some pictures and videos from the faire. I think you should include some of the failed parts, and I would like to see GUS upside down.by pjoyce42 - Delta Machines
Actually my original thought would be to use some of the aluminum extrusions from 80/20 or rexroth. I don't know the exact numbers, but I would expect that the torsional stiffness is, at a minimum, comparable to the 3d printed plastic arms of the same cross-sectional area. I was trying to avoid round rods because then you would have to find a way to fix the rod. With the aluminum extrusions, youby pjoyce42 - Delta Machines
Matt M Wrote: >But somehow, that led me to > the > kraken, which looks rather impressive, even > more impressive if you could drop it down to a > single motor. Open air extrusion of 400 mm/s, > burst at 900 mm/s, and able to perform at 20 > microns (not sure of the print speed there). Looking at the kracken I don't understand why they didn't just use a geartrain so that theby pjoyce42 - Delta Machines
This is awesome to see the new design in action. I am a bit confused as to what advantages the new design holds over the previous iteration? It looks like the only advantage is more stability at higher print speeds. How does the volume of printed material compare between the two versions? Either way I can't wait until the design is finalized and released, I'm already saving my pennies so I can gby pjoyce42 - Delta Machines
I have to admit, I was wondering how you managed to make such amazing models in any of the FOSS MCAD suites. It makes a lot more sense now. I actually have Inventor (and the simulation suites (I love that my autodesk accout still works from when I was a student)) on my personal computer, and I use Solidworks all day, everyday at work. I'm a mechanical engineer, so this sort of thing is right up mby pjoyce42 - Delta Machines
@nicholas.seward: I've been reading through this thread with great interest, and I really like the direction that this design is going. I am particularly impressed by the way you managed to find a great balance between cost, reprap-ability, print volume, and precision. The potential to do milling is very enticing, and it occurs to me that you could make almost every plastic part out of alumiun (by pjoyce42 - Delta Machines