@atmark I got the Zylon yarn now, attached is an image. It is not a single strang. Diameter, when stretched, is about 0.1 mm, with force of about 50 N/5 kg it is 0.08 mm.by JoergS5 - Hangprinter
QuoteMKSA Note, nuts precision is the same, made with the same tooling !!!!! Statement above irrelevant). Thank you for sharing your knowledge about the production process. I would have expected high precision from the nut and expected little friction and low precision from the antibacklash nut, because with the antibacklash nut it is not precision but low friction that is important.by JoergS5 - CoreXY Machines
I don't see problems with the C version, I think there are simply more H versions offered by the sellers, why they are used more often. I see more problems when you buy carriage and rails separately, as Hiwin and non-Hiwin have different rail profiles and the ball diameters are different also. I had my pitfalls....by JoergS5 - Extruded Aluminum Frames
I would expect the main nut to be produced with higher precision than the backlush nut, so I would place the main nut near the bed.by JoergS5 - CoreXY Machines
An example of a round timing belt is the Daltec Friction Drive:by JoergS5 - Hangprinter
There is a sample configuration for ODrive and Duet here under Config Comments: (blog by tobben)by JoergS5 - Hangprinter
Quoteatmark ...For now, I can confirm that the GT2 spool made of PLA can't hold the line, it slips under the belt no matter how tense it is. So, the surface roughness of the PETG-CF is crucial. If PETG-CF is so important for friction, you could print PLA in the inside and only the important outer surface with PETG. One additional idea is the application of little industry diamonds on the surfacby JoergS5 - Hangprinter
@atmark I bought the Zylon yarn now. If you have a test setup for me, I can measure the properties after receiving it.by JoergS5 - Hangprinter
Quoteatmark QuoteJoergS5 Another interesting material is yarn from PBO Zylon Yes, this is also interesting. Quick googling brought up a japanese fishing line manufacturer called Yotsumi. They have a Zylon base product line called YGK. Its a 5 m long line so it would about a suitable length. But its really expensive. 20-25€/5m :O This here is cheaper: but I didn't find the info which of the 2 tby JoergS5 - Hangprinter
Another interesting material is yarn from PBO Zylon. Longitudinal tensile Modulus: Spectra: 66...124 Kevlar 49: 154 Steel: 210 PBO Zylon AS: 180 PBO Zylon HM: 270 GPa Zylon is from a japanese manufacturer. There is an even higher material called PBT = Poly(p-phenylene-2,6-benzobisthiazole) with modulus 320 GPa, but I didn't find wire/yarn for it.by JoergS5 - Hangprinter
You can consider Kevlar 49, which has less streching than Spectra.by JoergS5 - Hangprinter
I offered the ideas only because in your second video at second 18, when you change from X motion to Y motion, there is a jerk in the gears which may produce X direction errors. I thought this is due to backlash, but this may have another reason. I agree that using flexible material will create other problems.by JoergS5 - Look what I made!
This a very interesing idea. If you suffer from backlash in the gears, you can try a friction drive (with 90 degree pivoted), or the idea of Looking forward your further development!by JoergS5 - Look what I made!
@Apsu please don't be disappointed about low participation. Like me I am sure several people are reading your thread with interest and wish you good luck implementing a good printer. I would be interested in a category here in the forum to list all patents and when they expire. We could also collect prior art examples in this area.by JoergS5 - Look what I made!
Thank you for the link!by JoergS5 - General New Machines Topics
Oliver3D: thanks for your permission. I have no commercial interests. Thanks Victor for the information, the old threads are really interesting. I need more chemical know how to understand the matter. It's a shame how often things like adhesives, silicone tubes and in this case resin become obsolete and useless: one uses 5 drops, and after half a year you can throw away the rest of 300ml becausby JoergS5 - General New Machines Topics
The idea is to use something I know. A waste is no problem. I am thinking about combining 3D and CNC (with some QM with cameras), so the Duet is not used for the SLA alone.by JoergS5 - General New Machines Topics
I would like to try your printer. I am running my 3D printers with Duet hardware and so I know the firmware best and would prefer to use Duet instead of your controller. Do you mind if I adapt your printer to this controller? If you have something against it, then I keep my own development to myself. But of course I would like to share it with others if they want to use Duet as well. Of courseby JoergS5 - General New Machines Topics
I think your price is a good price already. I hope it will drop a bit into the direction of FFF filament in the future. I don't know how to produce resin. The only thing I know is that a catalyst is necessary, which reacts to the UV light.by JoergS5 - General New Machines Topics
So I'll look for better laser diodes... Thanks for your numbers, they give me a good orientation.by JoergS5 - General New Machines Topics
That's a very nice project and congratulations for the good print result. I have avoided SLA so far because of the high costs of resin. Have you found cheap resin or can you produce it yourself?by JoergS5 - General New Machines Topics
Thanks for the inspirations, Victor. Diodenmodul61 was one of the ideas. Is it possible to melt Aluminiumpowder with it (under Argon)? Maybe I have to try it.by JoergS5 - General New Machines Topics
@Dust You are right, which is the reason why I wonder whether it's possible to assemble them like stringing up on a chain, into one laser beam. The reason why I ask, I bought 50 of those 300 mW laser diodes...by JoergS5 - General New Machines Topics
Is it possible to multiplex laser diodes so they have enough power for metal melting? I have 808 nm 300 mW laser diodes: is there an idea to let them work together? I thought of install them separately and focus to one point, but maybe you know another method like sending the laser beams into one common fiber to produce one beam.by JoergS5 - General New Machines Topics
Hello, I would like to experiment with Schwarzite, a structure that has high strength. There were 3D printed ones created by a university, but they are without sources. Does anyone know 3D sources, best would be a parameterizable model. I would prefer an OpenSCAD model to vary resolution and size of holes.by JoergS5 - Object repositories
You can take fast steppers: normal size nema 17, low inductance like 1.8 mH. The calculated max speed is about 16 U/sec for a 2.5 A stepper (you need a controller capable of that), so for a Tr8x8(P2) spindle you get 128 mm/sec, which I think is enough. I would take anti-backlash lead screws (screw with second short screw and spring between) to avoid errors with the many direction dchanges in theby JoergS5 - General
QuoteVDX ... sorry, can't post more details or images as it's again an R&D project wit NDA's I understand. Good luck with it!by JoergS5 - General
QuoteVDX ... not powder - think about melting/fusing thin wires with the laser Could you please show a picture or give my a youtube hint? I know the HRL video, but this is powder imho. => I found your info on It is an interesting solution. The combination of different manufacture methods seems to open a lot of possibilities. Besides welding I found the possibility of galvanic 3d printingby JoergS5 - General
QuoteMKSA Done for metal using plasma, laser, ion beam deposition. VDX mentioned his current work, laser plus "plastic" filament. You mean laser plus metal powder? I mean melting metal (heat up with induction e.g.) and printing without laser. Laser plus thermoplast is used at the FastFFF, it is a good idea.by JoergS5 - General
I am thinking about whether it's possible to press the melted filament into the nozzle with other measures than the extruder. If melted material can be pressed by e.g. Argon to avoid oxygen reactions, you could make overpressure or underpressure to control the melted filament flow. The reason I am thinking about this is to think about printing aluminium.by JoergS5 - General