QuoteJamesK Wow! That's stunning. And the lipo power reservoir is brilliant! Gotta disagree, seems like I'm always finding new ways to kill lipo cells. Can't you use something less fragile like supercaps?by rmlrn - General
QuoteTraumflug QuoteMKSAit is the customer who is in the end, is responsible for ! While this might be true from the legal point of view, it's not really applicable to the real world. How would a newbie distinguish a $20 E3D on eBay from an equally looking $40 E3D in some dedicated RepRap shop, assuming the same description each time? He simply can't. There's also no way to educate newbies, becaby rmlrn - General
QuoteDavid J I bought 2 original E3Dv6, and have only experienced 4 or 5 jams since I bought them many months ago. I know exactly why they jammed - I didn't follow the process that I've established over time. This is to unload the filament when I've finished with it, and to leave the power on (and therefore the hotend heatsink fan running) until the software shows that the nozzle temp is down toby rmlrn - General
QuoteTraumflug QuoteSrekImo developing open hardware in the context of RepRap has no viable commercial base, thus i only do it as a hobby and explicitly don't see it as a potential side job. Ah, OK, so you work actively on RepRap businesses going south by taking the value of engineering work away. Not sure if your employer would still pay you if you'd start to the same in his business field. Anby rmlrn - General
So basically you want people to fund you playing around with SLS?by rmlrn - Reprappers
Hi DD, I've seen you state several places that belt-coupled screws help maintain orthogonality of the axes, but I'm not getting it. Isn't the direction of the z-axis defined by the linear support (rail/rods)? If you rotate one screw alone, that will raise/lower that side, tilting the platform and potentially binding the screws. But even tilted, turning both screws in sync will still move the plaby rmlrn - Reprappers
lol their github includes a crack utility... good luck, looks like a neat piece of hardware.by rmlrn - General
Thanks guys for the comments but I'm a bit confused, my drawing has 3 adjustment points not 4, in total agreement with you about that! My bed is 3/8" cast jig plate and only 200x200mm, so I'm pretty sure it rigid enough to stay flat only supported at 3 corners. I'm more concerned about potential warping forces due to overconstraining the system, even with 3 just screws. A ball in a circular caby rmlrn - Mechanics
I'm thinking about how to make my bed plate adjustable, and the typical method (bolt fixed to build plate threaded through the base plate) doesn't sit right with me. It seems like making more than tiny adjustments like that is asking to bind the screws/bend the plate. I've been looking at optical mirror mounts for inspiration, and they seem to have one end of the adjustment screw free to move. Heby rmlrn - Mechanics
It's a RAMPS alternative for 32bit Arduino, not an integrated board.by rmlrn - General
I suppose this is what I'd been looking for: Bit expensive for a Chinese undocumented part though, and I can't find much info on it. EDIT: Ha, if you look closely it's got the Open Source Hardware logo...by rmlrn - General
QuoteFrans@France QuotermlrnGen7 looks nice but AFAIK it only runs the Teacup firmware which doesn't seem very actively developed compared to others like Smoothie. Might be that your definition of "very actively developed "is different then mine QuotermlrnAlso the only place to order from is in Europe, and only sells unassembled anyway? You don't have to order from Europe as you can diy, but ifby rmlrn - General
QuoteFrans@France So why not the Gen7 32bits version that has just been released. Around Euro 48,- or cheaper if you do the pcb yourself. That would agree with the OP's question "Why hasn't a RAMPS-like system emerged around the $50 price point?" EDIT : added link Gen7 looks nice but AFAIK it only runs the Teacup firmware which doesn't seem very actively developed compared to others like Smootby rmlrn - General
Well, graphical lcd, delta and high speed all sound like nice things to have as a possibility to me... but yeah so far I am pretty happy with RAMPS + Raspi/Octoprint.by rmlrn - General
Quotethe_digital_dentist Quotethe_digital_dentist Improved reliability, additional features, and ease of use are worth a few extra $ to some people. And clearly not to others... They're worth something. And I certainly would prefer 32 bit for a small price bump! But the Due clones prove the 32bit controller is not responsible for the huge increase, and I don't see why a few level shifters wouldby rmlrn - General
Due clones are available for $20, and the (flawed) RAMPS-FD v1.2 are sold for $29. But the cheapest working systems seem to be the integrated smoothie clones around $75 from china. Why hasn't a RAMPS-like system emerged around the $50 price point? Is the demand for 32 bit still only from "high end" users who are fine paying $100+?by rmlrn - General
So I got my first leadscrew from ebay - TR8x2. It came with a brass nut that seems very loose to me. If I hold the screw vertically it will spin down the shaft under it's own weight, but it makes a horrible chattering/ringing sound, and if I move it with my fingers it seems to have at least 0.5mm lateral play. Is this normal/how much of a problem will it be? It's for the Z axis, so backlash is nby rmlrn - Mechanics
Ok after reading some more I think I understand - if the platform rotates perpendicular to the linear guide, then it will bind the screw. So the screw "support" only works if the linear guide and platform are stiff enough not to need supporting.by rmlrn - Mechanics
I'm trying to figure out how to build my Z axis. A common configuration seems to be a cantilevered bed supported by two linear rods with a drive screw in between: R--S--R |--------| |--------| --------- I'm wondering why this is used instead of having the screw support the opposite side of the platform, like this: R-----R |-------| |-------| ---S--- What I'd actually thinking of doing is aby rmlrn - Mechanics
QuoteTraumflug QuotermlrnGPL already covered this issue.. GPL doesn't apply in this case. That doesn't mean it can't serve as inspiration. Anyway, the whole idea of "licensing" things which aren't protected intellectual property doesn't make that much sense if you look too closely at it...by rmlrn - General
QuoteTraumflug QuoteleadinglightsAs far as providing the files the creator used, does that include all data sheets, working calculations etc.? That's actually a good question and not easy to answer. For example, the Alligator Board design was made in Altium. Accordingly, a maker having the actual source files would need to buy a licence for that application just to read these sources. Not exactlby rmlrn - General