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Re: Outrunner Schnekenstruder - 11 months ago

why do the machining on the rotor instead of just replacing the shaft with something hollow and having a bolt-on? If you are going to 3d print the rotor, could you 3d print the entire thing instead of having to machine the old one and glue a new top to it?

by dlang - Tech-Talk

Re: A Very Different Extruder - 1 year ago

one bearing thick, but a largish bearing 10mm dia, x 4 mm tall is ~315mm^3 something 4mm dia and 25mm tall would be about the same volume (so similar mass, although bearings are not solid), but smaller diameter, so less angular momentum (i.e. easier to stop and reverse) I am NOT saying that their design is better, just that it may not be as obviously worse as first glance would have it. I was j

by dlang - Tech-Talk

Re: A Very Different Extruder - 1 year ago

Quote It's interesting that all of these have rollers that appear to be 20 or 30mm tall. If you play with 3 pencils, it becomes quickly apparent that there can be only ONE central point of contact between 3 canted rollers, which is what makes the roller positions and spacing so critical. Any roller taller than that one point of contact is just wasted space and mass. The added length would give

by dlang - Tech-Talk

Re: A Very Different Extruder - 1 year ago

you mention a few posts back that you considered using a bldc, rather than re-wiring it, consider going with a smart controller like the odrive. It needs an encoder, but you don't need to go with a high resolution encoder like people normally do, as you note with 28 positions/rev you can get to 125 steps/mm, so a 7 ppr quad encoder setup (say with a copy photodiods) would be enough resolution, an

by dlang - Tech-Talk

Re: Hangprinter version 2 - 5 years ago

I finally got a chance to look at your hangprinter v3 post, and one thing that jumped out at me is to ask why you are doing two lines of each side rather than just one line off each point? two lines adds more chances of calibration problems. Another option to consider is to simplify the math a bit by changing the mountings so that the lines are always pointing at the extruder (or at least at the

by dlang - General

Re: Hangprinter version 2 - 5 years ago

check to see if the diameter of your spools matches what the system thinks they are, if they are slightly larger than the software things, that could cause the problem you are seing.

by dlang - General

Re: A new generic 3.3v RAMPS? - 5 years ago

just a thought, but what if you eliminated a lot of the connectors by making a 3.3v ramps board that had solder pads so that you could attach an ESP-32 to it?

by dlang - RAMPS Electronics

Re: Hangprinter version 2 - 5 years ago

you should be able to have the Pi act as an Access Point and connect to it directly if you want to go in that direction.

by dlang - General

Re: Hangprinter version 2 - 5 years ago

take a look at:

by dlang - General

Re: Hangprinter version 2 - 5 years ago

Quotetobben Ok, added links on all those sites. thanksQuotetobben It's also possible to drive steppers in constant force mode =) See the Mechaduino Project and some ongoing discussion about that here: I hadn't heard of that, I'll dig into itQuotetobben I don't recommend the Hangprinter as a first printer unless you're very confident with building open source hardware from before. The project is

by dlang - General

Re: Hangprinter version 2 - 5 years ago

Quotetobben @dlang There was already a link to this thread at I included the old thread as well just now. Where did you want to find the link? I'd love to see it in the github readme.md file I'd also like to see the link to the reprap forum at the bottom of this page ( ) be changed to point at the current topic rather than an old one. having it somewhere on this page ( ) would be nice as we

by dlang - General

Re: Idea: A RepRap Hanging From the Ceiling - 5 years ago

by the way, thinking in terms of other processors that could be used, do you know anyone who has used the esp-32 for 3d printing? it's under $10 and has 32 gpio pins (up to 12 analog inputs), 4m flash, 520K ram, and is a 32 bit processor running at 160/240MHz with wifi and bluetooth built-in. If you are moving away from steppers, you are probably going to move to a custom driver board instead

by dlang - Delta Machines

Re: Hangprinter version 2 - 5 years ago

you could permanently mount hooks in the room and just document what the measurements are.

by dlang - General

Re: Hangprinter version 2 - 5 years ago

Please put a pointer to this forum on the wiki or hangprinter.org I looked around and found an old thread, but not this one (I fond this one by reading the closed github issues) I have a few questions about the design of this. 1. why are you using doubled line instead of single line? do you need it for accuracy or to let the small steppers have enough power? or is there some other reason. 2.

by dlang - General