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General discussions. For specific printers / electronics / fabrication methods / softwares, please see other sections.
Re: Induction heater - 7 years ago
I see induction heater as a valid alternative to cartridge heaters. What most people miss is that current coils are built to deliver over 1000 degrees C. Totally over-kill for melting filament. Smaller, lighter weight coils, with smaller capacitors could be used to produce 500 degrees C or less, and offer more control over selected melt temperatures. More experimentation and prototyping may resulby prot0typ1cal - General
Re: Good 30mm heatsink fans 
- 7 years ago
I use Digi-Key for fan model selection, then shop around for a better price. Best part, Digi-Key posts actual CFM and dB(A), not BS marketing jargon. type "DC fan" in the search field, then drill down from there.by prot0typ1cal - General
Re: CoreXY, fixed bed - 7 years ago
With linear guides, the front won't flex, as the gantry provides more than enough bracing. Plus, your "U" frame will also add to the rigidity. Though I would have a concern of the "U" arms flexing up and down. Adding triangle shaped gussets under the "U" arms, with their points forward and a tall flat back plate, will help minimize vertical deflection. How are you guiding the Z axis? It will needby prot0typ1cal - CoreXY Machines
Re: Core XY vs Hbot Build - 7 years ago
CoreXY requires more math, which puts it out of most people's understanding. Besides the standard CoreXY box, there are CoreXY "arms" that are used as 3dPrinters: and plotters:by prot0typ1cal - CoreXY Machines
Re: Hlidskjalf, Dual CoreXY - 7 years ago
Thanks Still a WIP. Got some quality crimpers coming from Japan to finish the wiring. Slow but steady progress...by prot0typ1cal - CoreXY Machines
Re: [Poll] Bed mounted on springs ( prusa-style ) ? - 7 years ago
Bed mounted on soft springs can be a good thing. In the case of the MB Rep2, it had a bad habit of curling when bridging, around edges, or off the build plate. The springs deflected under these small collisions, preventing the build from being dislodged (most of the time).by prot0typ1cal - CoreXY Machines
Re: Looking for a 3D Printer that meets these specs: - 7 years ago
The FolgerTech FT-5 probably could be converted to coreXY without a lot of effort, as there's two motors on the Y alreadythat can be used for the CoreXY. That frees up the X motor, removing it from the gantry. Seriously, FolgerTech should offer coreXY as an option for the FT-5. Yea, you'll need more pulleys/idlers and longer belts, brackets, etc. BTW, if you join the FolgerTech facebook page, theby prot0typ1cal - CoreXY Machines
Re: IR heat lamp heated ABS build: - 7 years ago
IR lamps don't need an enclosure, as there's no ambient heat to contain. I don't have an enclosure, hence "open", nor do I want one. DD, yea, I saw a video of an i3 rigged with surround IR lamps. Controlling the temp would be haphazard at first, but with trial and error and the help of sensor(s) and potentiometers for dialing intensity will be as easy as finding hotend and bed temps for variousby prot0typ1cal - General
Re: IR heat lamp heated ABS build: - 7 years ago
Bump I have an open design and am going to give the ceramic elements a go as soon as it's up and running. Wrapping exposed plastic assembly bits with aluminum foil seems cheap and will reflect up to 97% of the IR radiation "shiney side out", though matte foil is estimated at only 70%. Stainless steel foil is rated at 90% and doesn't conduct heat as well as aluminum, so may be a better IR insulaby prot0typ1cal - General
Re: I'm printing at 6mm/s right now. - 7 years ago
Like to see what the rest of the printer is doing during the print. AFAIK you never fixed the cattywampus belt routing.by prot0typ1cal - CoreXY Machines
Re: Corexy belt path question - 7 years ago
For CoreXY, everything in the grey zone is up to your imagination.by prot0typ1cal - CoreXY Machines
Re: Hlidskjalf, Dual CoreXY - 7 years ago
Been a month between jobs, so haven't the resources to work on Hlidskjalf. As soon as time/money permits will continue Have too much invested to quit now dangit!by prot0typ1cal - CoreXY Machines
Re: My coreXY design is progressing to the build stage - 7 years ago
I like the new Z belt-worm drive set-up. Solid, symmetrical, and simple. What a tank !by prot0typ1cal - CoreXY Machines
Re: Want to build new Corexy and so many concerns - 7 years ago
I like the recent "D-Bot CoreXY in threes" by printingSome. DD won't like the 3 stepper Z, and I don't care for the unsupported Z screws. The 3x D-bot build does link source files. Everyone seems to have their own take on the CoreXY.by prot0typ1cal - CoreXY Machines
Re: Synchronicity in interesting ideas - 7 years ago
QuoteJamesK Quoteprot0typ1cal One observation, doesn't look like there's adequate wedge to cam clearance to remove the hot end. A larger cam may be required. Isn't that why there's a flat on the side of the cam? Color me wrong, looks like the grey plate needs to slide before it can drop is all... which would mean additional gap needed between the flat and wedge.by prot0typ1cal - General
Re: Synchronicity in interesting ideas - 7 years ago
I like your concept (saw it on the 3d printers/builders FB page). One observation, doesn't look like there's adequate wedge to cam clearance to remove the hot end. A larger cam may be required. Second, does not address various hot end dimensions, diameters and neck lengths. Last, leaves connectivity and wiring routing up in the air for the users to figure out . I'm in favor of the Toranado approby prot0typ1cal - General
Re: Better PEI build surface - 7 years ago
There are chemical processes that can coat on PEI, but they're expensive and really hazardous. Usually involving strong acid baths and temps between 80 and 250C. or... Could try some IPS Weld-On 3, is water-thin, quick drying and is mostly Methylene Chloride in composition. (to quote the sale pitch). Polyetherimide (Ultem) is resistant to most solvents (glue), Methylene Chloride is one nasty chby prot0typ1cal - Mechanics
Re: My design of a CoreXY, reasonable large format. - 7 years ago
Igus sells hard anodized aluminum shafts. The 12mm solid and 20mm hollow (2mm wall) weight about the same per meter. Though have seen printers and routers using EMT (conduit) for shafts, MPCNC on Thingiverse for example.by prot0typ1cal - CoreXY Machines
Re: My design of a CoreXY, reasonable large format. - 7 years ago
I've thought about large scale 3d printers, and seems mass becomes an issue when making components bigger to maintain rigidity. IMO, CoreXY works for small/medium formats, or rectangular long Y builds (short gantry). When excess of a meter, travelling columns and gantries will not have the speeds equal to the task of a large print volume. Belt stretch and droop (sway, and drop) is going to becomeby prot0typ1cal - CoreXY Machines
Re: My coreXY design is progressing to the build stage - 7 years ago
"Proof is in the pudding" Print a box and use a machinist square and calipers to inspect the build. If your critical eyes don't see an issue, let her rip. That, and I really want to see this beast in actionby prot0typ1cal - CoreXY Machines
Re: Help to find the best combination for CoreXY Machine - 7 years ago
I'd go with 1m MGR12 for the X (least moving weight), 2x 1m HGR20 for the Y, and 3x 1m SBR16 paired with drive screws running close for the Z, with a set on either side in front, and the third centered in the back for optimum leveling. Make a sweet 1 meter box, though your print size will be less natch. Probably around a 800mm cube, so you can use 4x 400mm square heaters for the bed.by prot0typ1cal - General
Re: Question on design of new Printer - 7 years ago
Yes, many cartesians use only one motor. Makerbots being a prime example. Advantage of two motors is extra torque because of the extra mass that moves in the Y. FolgetTech's FT-5 does their Y with 2 motors. Disadvantage, is with two motors, they tend to drift out of synch when powering up/down. Only seems to be an issue with high micro-stepping and funky gear to pulse/rev ratios.by prot0typ1cal - General
Re: Make PR for repetier firmware - 7 years ago
Stupid. So instead of printing a straight line, moving in only one axis, you'll print a stair step that approximates a straight line, because Prusa knows prosumers can't square up the axis worth doo-doo. And if the bed isn't assembled square to the axis, the firmware will assume it is?, and "compensate" so your print is square with the little dots, in all 3 axis no less. Great, now they can shipby prot0typ1cal - General
Re: Linear guide carriages interchangeable? - 7 years ago
Odds are stacked against you. Even buying the same manufacturers block will have mixed results, as often the blocks are "match-fit" for the rail. A few ten-tousandths of an inch can be the difference between binding and being too loose. Different manufacturers also use different spacing, ball sizes, and groove configurations, so mixing manufacturers is not even worth trying IMHO.by prot0typ1cal - General
Re: How can I fix belt shifting? - 7 years ago
I'd fix your belt routing first. Go ahead and rapid through your XY limits. Let us know how that works. Regarding bigger steppers, Smaller steppers won't effect overall print speed by lowering the accel/decel rates, as much as having to limit print speeds because the belts are out of plane and twisted. Wacked belt routing is also going to limit your available/reliable print volume. Let me explby prot0typ1cal - CoreXY Machines
Re: Overengineered CoreXY - 7 years ago
For CoreXY with linear guides, the red piece can be a thick "U" shape, with the top of the U facing front, and the belt crossing in the back. Reference: If your concerned about the CoreXY stage (red thing) remaining flat, and the arms of the U twisting, forget I even mentioned it. Just like placing the CoreXY inside the frame instead of on top. LOLby prot0typ1cal - CoreXY Machines
Re: My coreXY design is progressing to the build stage - 7 years ago
Quotethe_digital_dentist I have one of these that I use for initial set-up of the orthogonality of the axes: I have placed it on the bed and watched as it moves and it looks very good- I don't see any angular variation beyond the noise in the device's output (it isn't very stable in the last digit). Nice, was going to suggest an inclinometer like that, think they use accelerometers with a digby prot0typ1cal - CoreXY Machines
Re: Overengineered CoreXY - 7 years ago
anvoice, Regarding your frame, if you make the corner spars taller, you can still mount your CoreXY stuff inside the 90 via adjustable brackets so machining is not required, and keeps your top flat for the enclosure. If tall enough, the filament spool will also be inside, no escape for the warm air. I think DD said he is doing this for his Trump tower. Sry DD, no offense intended. The extra costby prot0typ1cal - CoreXY Machines
Re: Overengineered CoreXY - 7 years ago
QuotefilipeCampos Having a bad day? from your last post and if your are a amercian i pretty sure you voted trump.. Working on a larger version, with faster print speed:by prot0typ1cal - CoreXY Machines