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This forum is dedicated to "Hangprinter" style mechanics ...
Re: The Badass Pellet Extruder - 4 years ago
QuoteDukeNukem You have done a great jobb, all my appreciation! Did you think about selling one ? what would be your target price? Yes, we are planning to sell the extruder setup with or without the pellet dispenser system, so you can use either a big hopper and some magic a la gravity, or if you prefer to print huge without intervention, then you should go with the auto dispenser. For the extrby atmark - Hangprinter
Re: Sneak peek on the Bloft MK2 3D-printer - 4 years ago
Hi Long time no see. This time though, we made major leaps in getting the printer ready. May I present, the first life signs of the Bloft MK2 video Next week we will do a complete simulation run with gcode to see how it will perform and to see if there are any mechanical issues to be solved. We did already a short run with the full payload (extruder) of around 10 kg without issues. Makes me conby atmark - Hangprinter
Re: The Badass Pellet Extruder - 4 years ago
Well, the extruder isn't quite yet ready, since we have put much work into the printer during spring/summer. But we are getting close. There aren't that much of issues to be solved before we get to print. Here's the latest clip of the extruder & pellet transport system workingby atmark - Hangprinter
Re: List of environmentally relevant projects ... - 4 years ago
Since the forum search didn't spill out any results about Precious Plastic... here you go Precious Plastic Open source plastic recycling machineryby atmark - green talk
Re: Sneak peek on the Bloft MK2 3D-printer - 4 years ago
Sorry! Should work nowby atmark - Hangprinter
Re: Sneak peek on the Bloft MK2 3D-printer - 4 years ago
Fast forward a month and a half, and you got this A very rigid, yet light, frame based on static trusses and tensioned steel wire cables. We got also rid of the Mad Max look & feel of the already corroded steel surface. Now all steel parts are galvanized and have a nice black oxide surface. The 90% assembled printer will be exhibited at the main venue of the Helsinki Design Week 11.-13. Septeby atmark - Hangprinter
Re: Hangprinter version 3 - 4 years ago
Hi Well, yes, the dozuki site is empty since I haven't got the time to document stuff there. Doing proper documentation is a whole new project and unfortunately something you can't get done in only a moment. I've always had the plan to open source the frame and that will also happen, but currently I'm too busy with another project. So, maybe in winter when I get more spare timeby atmark - Hangprinter
Re: Sneak peek on the Bloft MK2 3D-printer - 4 years ago
We reached today a big milestone! Finally the frame is standing on its feet. In the coming weeks, we will be adding hardware to the frame and eventually start testing the electronics and firmware.by atmark - Hangprinter
Sneak peek on the Bloft MK2 3D-printer - 4 years ago
Hey I'm happy to give you a first peek on our printer that we are currently building. The Bloft MK2 is based on Tobben's HP4 which we will extend with moving ABC-anchorpoints. We will have a modular frame based on stage trusses. The ABC-anchor's will glide on those trusses in the Z-axis. That will enable a cylindrical print volume making it more useable for tall objects. Total height of the fraby atmark - Hangprinter
Hangprinter version 4 - 4 years ago
Hey Tobben I would need your help with the wiring of the Duet2 and of the Odrive boards. The issue is, that I will need the thermocouple daughterboard interface for sensing my extrude temperature. Would it be possible to use the SPI0_X pins of the expansion interface instead? What you I need to change in the code? The Badass Pellet Extruder is now already semi-operational. We are already ableby atmark - Hangprinter
Re: Hangprinter version 3 - 4 years ago
QuotepvsfaAlso open to develop this further in different platforms if you got some ideas and a bit of time. Ok, so the Hangprinter documentation could be maintained here Personally, I like the style Prusa and e3d-online are doing. Lots of images, each and every step is documented, simple and plain instructions. I have also the complete frame and the Hangprinter motion unit modeled in Fusion 36by atmark - Hangprinter
Re: build instructions, tweeks, tips and links - 4 years ago
Hey This is a great summary! Now, that I have about two years of experience with the Hangprinter, I can make some suggestions in addition to your list. 1. You should go with Nema 23 or beefy Nema 17. I'm using standard sized Nema 17, and they are completely underpowered for a printer this size. This manifests in geometry distortion, once the print passes a certain size. It has definitely to doby atmark - Hangprinter
Re: The Badass Pellet Extruder - 4 years ago
Time for an update! The Badass Pellet Extruder has got a electronics enclosure for the Duet thermocouple daughterboards and for the power cable junction. This is where all the cables coming from the control board will be terminated. Now it starts to look like a neat package. Next thing on the todo list will be an anti-ooze mechanism for the nozzle.by atmark - Hangprinter
Re: The Badass Pellet Extruder - 4 years ago
Ok, so I got the heatsinks and they fit perfectly onto the barrel. But, as I want to have uniform cooling on both sides of the barrel, I had to saw pieces off the heatsinks so they fit in opposition to each other. For now they are hold in place by aluminium plates, but I might finish it with a hinge on one side and a tightening clamp on the front side. I will also swap the 5V fans for 24V equivalby atmark - Hangprinter
Re: Concept for a tool changer effector - 4 years ago
Well, this was fun Incredible what you can do with lasercut sheet metal! I choose 1.5 mm steel for this, but it turned out to be so sturdy, that 1 mm would have done it too. This is a beast of an end effector XD Next step painting and then I'll swap the screws for rivets. And after that, I'm going to be able to concentrate on the corner pieces and the extruder holder. I have parts for 3 extra enby atmark - Hangprinter
Re: Adjustable frame for the Hangprinter - 4 years ago
Quotepvsfa it is indeed not too easy to calibrate but i was actually hoping taht once you got sort of uniform structure for the printer - which would be this very frame - it would become much faster (right?) autocalibration didnt help me much, but i ll give it another shot, once i put the printer up again! Well, you won't get any speed advantages, since the v3.3 works with Nema 17 stepper. Theyby atmark - Hangprinter
Re: The Badass Pellet Extruder - 4 years ago
The screw diameter is 16 mm, with a compression rate of 2,5. So, I think we're talking about the same screw here. Your gate valve idea is interesting, since there will be oozing/retraction issue if you don't address this matter. Have you done already extrusion tests with the valve? I thought about a valve too, but I haven't decided yet if and which type to use. I'm having some concern about the sby atmark - Hangprinter
Re: Concept for a tool changer effector - 4 years ago
Finally, I got the chance to bring the end effector concept to the next level. I've been dealing with stability issues with the current version which you can see in the renders on top of this thread. The carbon fiber beams were fixed to the joint parts by zip ties, which are a quick and easy thing to work with, but you won't never get a stable joint by using them. Now, that I am planning to attaby atmark - Hangprinter
Re: Adjustable frame for the Hangprinter - 4 years ago
QuoteOhmarinus Omg that failure is horrific! You are refering to the huge blob on the extruder? Yes, that happens when you have a line failure, I think Tobben you had this too once? Or something similar at least. There is room for security related improvement, in this case a way of measuring the line tension would have been needed to sense a failure and thus stopping the print. Small steps, herby atmark - Hangprinter
Re: Adjustable frame for the Hangprinter - 4 years ago
Hey I've been running the Hangprinter on this frame now for over a year and I've learnt a lot during that time about the printer and the frame. One thing is, that it is currently quite complicated to calibrate it. Tobben's auto-calibration script helps a lot, but there are also things to consider like the flatness of the floor, z-position of the anchor points, correct angles of the frame legs, eby atmark - Hangprinter
Re: The Badass Pellet Extruder - 4 years ago
Quotestijnvanstijn Don't you need any cooling of the tube in the beginning? That is something I am worrying about... any chance of sharing the parts you used for tube, screw and nozzle? /quote] Yes, active cooling is needed. I've already ordered heat sinks with fans, that clamps themselves on the barrel. Before they arrive I can't really test the extruder. The feed area overheats quite fast untiby atmark - Hangprinter
Re: Hangprinter version 3 - 4 years ago
Hi Centralized documentation would be needed and I was already planning to setup up one on Dozuki, but it is a really time consuming task. Time that I currently don't have... I have though a lot of images I made during the build process, those might help a lot. Hangprinter Google Photos But then, there's also a lot undocumented stuff, that you learn once you've build the printer and have operatby atmark - Hangprinter
Re: The Badass Pellet Extruder - 5 years ago
Great news! After replacing the nema 23 planetary gear reduction to 4:1 things start to roll nicely. I was already able to push the output to approx. 800 g/h And I'm sure that wasn't the boundary yet, still aiming for 2 kg/h Here some images from testing the extruder with UPM Formi -pellets. It is a cellulose-PLA compound with 20 or 40% of cellulose fibers.by atmark - Hangprinter
Re: Motion unit development - 5 years ago
Couple of interesting photos before the end of year! The mail-man dropped at last the dyneema line I've been waiting for. Check especially the video! It reveals a distinctive pattern on two sides and perpendicular to that pattern a second pattern, that repeats itself every 5 mm. Those patterns are formed by two reflective yarns that go through the braid in opposite directions. The line is a 1 mmby atmark - Hangprinter
Re: The Badass Pellet Extruder - 5 years ago
Today, finally after fixing a defective band heater (crappy Aliexpress...), I got all three of them working. And I had also a chance to do a first test extrusion with LDPE pellet I have laying around. Video: Test extrusionby atmark - Hangprinter
Re: Motion unit development - 5 years ago
My intention wasn't to dismiss your work, Tobben. Not at all! I was just amazed how far back in time the cable driven robot/printer concepts go.by atmark - Hangprinter
Re: The Badass Pellet Extruder - 5 years ago
Update: Ok, so I got the thermocouple daughterboards finally. One daughterboard serves as a terminal for two K-type thermocouples. The second board is stacked onto the expansion connector of the first board. I got a reading from the 1st sensor without big hassle, but the two others were silent. It was a struggle, until I realized that Tobben's firmware for HP4 uses the SPIO header for communicatiby atmark - Hangprinter
Re: Motion unit development - 5 years ago
Just wow! I'm impressed, so you basically described the Hangprinter concept 12 years ago!? The idea with the ball-gliders was something I didn't get completely. Did you mean ball bearings for routing the wires? QuoteVDX Re: Parallel-kinematics versus string-pod December 04, 2007 09:51PM Admin Registered: 12 years ago Posts: 12,332 ... by the way - by rethinking the wire-systems i realized, thaby atmark - Hangprinter
Re: Motion unit development - 5 years ago
This is so cool! I love the fact, that you can upgrade from 3 DOF to 6 DOF fairly easy (at least mechanically). The Fraunhofer Institute has also some pretty impressive CDPR-machines.by atmark - Hangprinter
The Badass Pellet Extruder - 5 years ago
So, time for a new thread As you might have noticed, I've been developing the motion system hardware for the Hangprinter since October. I source most of my stuff in China nowadays, so there has been also a lot of waiting involved in that. And to keep myself busy, I've been working on the extrusion end of the printer. During the summer I used the Hangprinter in two large-scale print projects, whby atmark - Hangprinter