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Re: compact carrier for Kossel Deltas - 7 years ago

wow nice work. You could buy some iglide filament from IGUS if you're going to print bushings. I haven't seen anyone do that yet so it would be really cool and helpful to get some community feedback on I glide for delta bushings. Just checked the IGUS webpage, but hard to navigate but if I understand correctly some of their filament is around $60 for 250grams, which seems ridiculously expensiv

by Milton - Delta Machines

Re: Few problems with custom made delta printer - 7 years ago

I think the frame corners are not so great, not very stiff or strong with all the material cut away to make them 4-5mm walls with cutout vertical holes where there should be dense infill helping provide support. The carriages I do not think good, not fully realized design. nice idea but the amount of material and its placement, the ratio of length between contact points versus the cantilever fr

by Milton - Delta Machines

Re: compact carrier for Kossel Deltas - 7 years ago

nice idler setup. yes with bushings or anything sliding the ratio of offset from the drive to the points of contact is a huge issue and the closer the better.

by Milton - Delta Machines

Re: compact carrier for micro Deltas - 7 years ago

make 3d printed prototype, get samples of material for towers, try things as you think of them before you get to caught up in trying to pick them apart. Then be rational and honest about what you have done right and wrong. Its sort of defined for this project as we have examples of a standard of performance from cheaper rails and V-wheels that is not really hard to surpass just by having no mov

by Milton - Delta Machines

Re: compact carrier for micro Deltas - 7 years ago

I think you're onto something. It took me a lot of revisions to get my design, went from flat sections of UHMD cutting board material as runners (not great but has potential, may revisit for cement laying house building delta) then moved on to delrin rod. The round shape works with an aluminum extrusion T slot to create the same angles of resistance to twisting that are seen in diagrams of good

by Milton - Delta Machines

Re: compact carrier for micro Deltas - 7 years ago

Love it! great idea to try something other than aluminum extrusion! Delrin is denser than PTFE, which is a bit spongy and will create more contact area for more friction with less accuracy. Delrin specifically over knock off brand Acetel from my research was higher durometer and therefore more appropriate. I just recently got some of the PTFE infused version of Delrin Acetel, it has PTFE in i

by Milton - Delta Machines

Re: DemonDeltaMicro printer - 7 years ago

Quoteo_lampe Printer sits on the very edge of the table again... IKR?!?!?! I just ordered a nice 3 tier freestanding shelving unit for like $25 on Amazon. I was looking at my printer mess, thinking 'dang I need some shelves' went looking and they are not to expensive, free shipping, no reason for not having a little organization. Also, I feel like if i look long enough at that image I will f

by Milton - Delta Machines

Re: Poor print quality of gears - 7 years ago

I looked at the STL with a .4mm nozzle E3Dv6 I doubt I could print that well enough to really work given the taper towards the center on the vertical gears. Would want to see the gear meshing intended but I doubt it would work in Tech-G low expansion PETG or Alloy 910 nylon, 2 of the better filaments I use for high accuracy parts. there are areas of the face of the gear you want for meshing tha

by Milton - Reprappers

Re: carriage wheels for 1515 extrusions? - 7 years ago

If you want it max RepRap, print the carriages and use my delrin bushing design, it works very well compared to V-Wheels or cheaper rails. MiltyKoss on Thingiverse I think you just need the carriages and carriage brackets its cost of prints and one Delrin Acetal rod, which should be around 5-8 USD depending on source and shipping. it's useful for other things as well, camera time lapse motion

by Milton - Reprappers

Re: Mid mounted pivoting extruders as a solution for a very short bowden - 7 years ago

I tried to export my Fusion 360 files, sort of failed. I tried to share a file, tested the function by downloading it. Autodesk uses an email link to download to datamine emails from anyone trying to collaborate, and then the file they send is a '.f3z' and fusion 360 doesn't even recognize it!??!?!?!?! F360 wants an '.f3d' and just ignores the file won't even see it browsing files to open and

by Milton - Delta Machines

Re: Mid mounted pivoting extruders as a solution for a very short bowden - 7 years ago

NICE! that is how mine started, with threaded rod as tower and simple zip tie existing extruder to it. it then pivoted on its own and gave me the inception of the idea that it pivot and follow the effector. I am trying to figure out hosting, I dont use thingiverse anymore since makerbot claims my even visiting makes all my designs their marketing material. scumbags are greedy and it sucks.

by Milton - Delta Machines

Re: trying to refine my print results - 7 years ago

With the stringing taken into consideration, I think your assessment of over extrusion is correct. Possibly a bit to hot as well. lower extrusion and see if it affects the lower square base top surface, try a slightly lower temperature, and If you can go up to 40mm/s retraction and make the travel moves as fast as your printer is comfortable with. Just another delta operator, only advice use a

by Milton - Delta Machines

Re: Mid mounted pivoting extruders as a solution for a very short bowden - 7 years ago

Quoteo_lampe Now that your mention it... there is enough "meat" around the screws to add small flanged bearings. My swinging extruder work without dampening. Do you see any overshoot when you try without dampers? BTW: I like the cylindric shape of the Delrin gliders, they provide way more guidance than the v-rollers. Just wondering if the friction/stiction could be even lower with an hourglass s

by Milton - Delta Machines

Re: Kossel xxxl - 7 years ago

maybe the paneling they put behind and around stoves? might be cheap, should be fire resistant. the main issue with fire is the spool igniting, maybe make that in a fireproof box and the rest fairly fire resistant. if you can keep the spool igniting it is a factor of print size. if the spool ignites its a much larger fuel source. I am not sure how much you want to worry about it, but then ha

by Milton - Delta Machines

Re: Mid mounted pivoting extruders as a solution for a very short bowden - 7 years ago

I am working on the explanatory and assembly instruction PDF now, but you dont need that. I will make a github post for it and link here unless you have a better suggestion. the round tubing is 19.95mm towel rods, literally the tubing you buy as replacements for tube and bracket designer bathroom fittings. its cheap for the variety of surface quality, I was able to match the extrusions on 2 ma

by Milton - Delta Machines

Re: Mid mounted pivoting extruders as a solution for a very short bowden - 7 years ago

the extruders tilt so they point upward for homing, it's a tight radius though at the endstops and I dont let it sit there too much, but sometimes it does sit at 220mm right at the top of build area after printing if I forget to drop it down to 160mm or so after removing the print. It seems to have no effect so far to have the PTFE at the tighter radius infrequently. I have tried to feed new fi

by Milton - Delta Machines

Re: DemonDeltaMicro printer - 7 years ago

I have been thinking about a delta that has a folding frame, so that 2 towers collapse towards each other with the third as the pivot, removable brace spaces out the towers for operation. your mobile machine seems like it might be a good base for that mod, with the battery pack a flat packable small delta might be pretty cool, extreme mobility and less weight than other 'mobile' frame designs.

by Milton - Delta Machines

Re: DemonDeltaMicro printer - 7 years ago

O M G hope the damage is not to bad

by Milton - Delta Machines

Re: Mid mounted pivoting extruders as a solution for a very short bowden - 7 years ago

Delrin brand Acetel, one of the densest low friction plastics and often used as a bushing in industrial setting. Works incredibly well. There is a certain amount of very consistent friction well below causing any stiction, they glide smoothly with zero lubrication. 2 adjustments of the preload screw in 10 months of use. I followed IGUS and others engineering recommendations for ratios of any

by Milton - Delta Machines

Mid mounted pivoting extruders as a solution for a very short bowden - 7 years ago

hello all, again, been a while. <3 the RepRap open source community This is my solution for having good melt zone control with short bowdens on a Delta style printer. YouTube demo of the system: Mid mounted pivoting extruder demo This is all experimental, from the printed linear motion to the short bowden system. not bad quality for an entirely self made machine, this one is the second

by Milton - Delta Machines

Re: Did I develop something? - 7 years ago

I am not sure what you mean by 'printed in the wrong direction', can you clarify that? printer works great, far better than expected, don't see any issues with 'wrong direction' except once plugging Y and Z stepper in to the wrong ports on the controller which made text backwards and upside down, all objects mirrored, for like 3 prints until I caught it. The one in the image with black PLA not

by Milton - Developers

Re: pivoting extruder to relieve bowden tube tension experiment - 8 years ago

First of all sorry for being so touchy, going through a tough time in life. yes I have thought about pulleys and counterweights, but I dont think it will work that well versus controlling the extruder height through software. This setup is having some issues with line thickness as extruder pivots in some configurations but not others. It's a bit complicated figuring out the best height for ful

by Milton - Delta Machines

Re: pivoting extruder to relieve bowden tube tension experiment - 8 years ago

forgot to address one crucial thing, you cannot improve what has been done unless you experience it. this was taught to me by a former head of design for a major car manufacturer and his instructors in a design program at a university, all successful designers. I built a mini kossel to understand 3d printing better not to have a good 3d printer, but then my designer education and maker backgrou

by Milton - Delta Machines

Re: pivoting extruder to relieve bowden tube tension experiment - 8 years ago

thanks!!!!!! apology not needed. I am sensitive, yep. There are reasons, but to go into them all, ugh. one is that in a society where lack of emotion is considered maturity it leaves the psychotic people that do not feel emotions at a distinct advantage. They abuse others emotional nature to gain social dominance, fake emotions when necessary to retain control, and we have a society that is

by Milton - Delta Machines

Re: pivoting extruder to relieve bowden tube tension experiment - 8 years ago

Multi materials, want to not be limited when I transfer to that after learning a bit more about single extrusion, since it appears to be the future. I can do 3-4 extruders on the pivot, or more. planning 3-4 to adapt the new Prusa system to a delta. Imagine 8 extruders on that setup... Like taht visual? I do. On extrusion. I have some ideas based on current and near future sensing technolog

by Milton - Delta Machines

Re: Did I develop something? - 8 years ago

Thank you very much Paul! Something interesting and possibly revolutionary about this system, zero lubrication needed, it is producing perfect accuracy and no wear on the bushings after a few spools of filament. No lubrication involved in the bushing system at all. Tried some silicon RC differential grease but wiped it off after a few minutes of testing by hand feeling the resistance, it seeme

by Milton - Developers

Re: pivoting extruder to relieve bowden tube tension experiment - 8 years ago

Side note, I have some experience with cables hoses and lines of various kinds. Several years as a dive tender for commercial divers using surface supplied air, handled and maintained the air lines and compressor operations. Unloading fishing boats using small lifts and cranes both from a dock and at sea (were you really focus and learn how the drum size and cable diameter effect the twisting

by Milton - Delta Machines

Re: My home Kossel build - 8 years ago

If you haven't built the rods yet I have a guide in this post about how to do rods with traxxas ends. Rod guide with pics is half way down in the instructions on the printer build. Not sure if the sleeves I use will work for your printer, just use the extrusion jig and rotation alignment techniques to ensure accurate lengths.

by Milton - Delta Machines

pivoting extruder to relieve bowden tube tension experiment - 8 years ago

I am experimenting with this, it's working very well. The effector movement pivots the extruder rather than bend the tube, releasing forces involved. Sometimes with J head and other slot mounted hotends they pivot, I have been told (my hotend has screw mounts). This pivoting is from buildup of forces. The hotend pivots from the torque of something, I suspect the bowden tube is the culprit,

by Milton - Delta Machines

Re: Sonic welding type heating of filament AND previous print layer? - 8 years ago

VDX Thanks for the interesting info. Thanks for not perceiving my simple desire to know something as a big pain in the butt. I figured someone that had messed with that type of thing would not mind another being interested. I still think there are future possibilities with this, maybe... or maybe not, never know till you think and discuss. Thanks again VDX very interesting, glad to have some

by Milton - Mechanics