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Re: Reprap Firmware and Controlled Arc Move - 8 years ago
Quotedc42 I am glad you have a workaround. The reason that slicers don't generate arc moves is that the input files to them are generally STL files, which are incapable of describing curves. A slicer could only generate arc moves if it recognised that a slice through a sequence of facets described an arc of constant radius, and made the assumption that the user really wanted a smooth curve. Manyby Koko76 - Duet
Re: The Least Unique Part Count Machine - 8 years ago
Quotemarcin_ose MechaBits - this is good, thank you. Would you mind showing a picture of your machine, including label 1-48 for the parts? That sounds like a really good count. Please see our update on the design - Thanks, Marcin and Michel I have 48 unique parts not Mechabits. There are tons of designs for deltas posted online including a nice BOM. I don't typically post pictures of my desiby Koko76 - Developers
Re: Wear in linear guides - 8 years ago
Quotethe_digital_dentist Question for the experts: when a linear guide wears out, what goes bad? Is it the rail, the races in the bearing block, the balls, or a combo? My experience cutting rails with a chop saw and abrasive wheel tell me it isn't likely to be the rails... Most bearing failures I've seen, be it linear or round start with the balls or rolling element. A ball skids, and flat spoby Koko76 - Mechanics
Re: Comparison between temperature sensors used in 3D printers - 8 years ago
QuoteDyze_Design Thanks for both of your comments! aussiephil, as you can see, the bigger the thermistor is, the faster the response time. The 0.3mm thermistor has a response time of 0.8 seconds while the 0.58 has 1.7 seconds.Same thing applies to thermocouple and RTD inside their probe. The larger the probe, the longer the thermal constant. A 6.35mm housing can take more than 30 seconds to reacby Koko76 - General
Re: What is the easiest way to add an E-stop to the Duet? - 8 years ago
QuoteVDX ... there are several "stop"-options with software and hardware: - software - "Normal" Stop in software with Resume possibility - the G-codes in the buffer/queue will be executed before stopping - software - "Normal" Stop in software without Resume possibility - the G-codes in the buffer/queue will be executed before stopping - software - "Emergency Stop" per G-code "M112" - all motorsby Koko76 - Duet
Re: Duet WiFi details published, pre-order window open - 8 years ago
I use S3D both 3.0 and 3.1 with both the 0.85 and the new DuetWifi. No issues at all, and I'm pretty sure the many small lines of code would actually cause hanging on a smoothie board in extreme conditions. I never had code hang on mine either, but I did get some odd results (on the smoothie board) with code that had smaller line segments. Having owned them all I'd say the DuetWifi is my fav,by Koko76 - Duet
Re: S3D Starting Code - 8 years ago
I can't speak to the specifics of a tool changing printer but I might be able to help your understanding. The duet runs firmware which is software that interprets a set of g codes and generates motion or other physical effects (turning on and regulating heaters etc). G code is a standard "language" used to describe these events as well as to set options in the printer. These include but are nby Koko76 - Duet
Re: The Least Unique Part Count Machine - 8 years ago
Quotemarcin_ose Ok, decent point, but now let's get more rigorous. Count the unique parts for the delta, down to individual nuts etc - and compare to the cartesian. We'll do our count as soon as we finalize the design. Do you have a count for the Delta as a benchmark? I have a count for "my" delta, but it was designed with my tooling capabilities in mind which are quite extensive. I also used liby Koko76 - Developers
Re: Zero-length planetary gear head for NEMA 14 extruder - 8 years ago
QuoteLoboCNC QuoteKoko76 Get me a pitch/tooth count etc on that internal gear, and I'll wire you one Wow, that would be amazing. The internal gear is 78 tooth, 48 pitch, 20 deg. pressure angle. Backlash is not a concern, so having a few extra thousandths of tooth clearance would help compensate for the vagaries of machining abilities. Getting one cut out of 0.125" aluminum plate (at least 2"by Koko76 - General
Re: The Least Unique Part Count Machine - 8 years ago
QuoteMechaBits I mean for Cartesian bot, like mine or the ormerod or similar 3 axis layout. I get that, but the stated point of the thread is to build a bot with a low unique part count. I'd challenge you to create a Cartesian bot with a lower unique part count than a Delta. You have identical "tower" assemblies and identical arms. Top and bottom plates could be the same too.by Koko76 - Developers
Re: Zero-length planetary gear head for NEMA 14 extruder - 8 years ago
QuoteLoboCNC Here's an ultra-compact planetary gear head I've been playing for a direct-drive extruder. The entire gear head fits within the length of the original motor shaft. The trick is that the output shaft, which is nothing more than the filament drive gear itself, rides right on the original motor shaft, eliminating the need for an extra set of bearings. The ring gear is pretty sketchy,by Koko76 - General
Re: The Least Unique Part Count Machine - 8 years ago
QuoteMechaBits Yeah but maybe you could do it with just three. It's almost like there's a whole subsection here for such a thing No maybe about it, delta printer.by Koko76 - Developers
Re: Rostock Design - 8 years ago
See the delta section of this forum. All sorts of more relevant info there. Depending on your comfort level and tools you can make whatever size arms you want. There are also people who will make up custom sets to order.by Koko76 - General
Re: Duet WiFi in use - 8 years ago
Quoteunromeo21 Can you tell us more about the performance of the drivers ? How do they compare with the "old" ones regarding noise, smoothness ? To me this would be the greatest plus over the current controllers on the market. Much quieter and smoother. I'm using the board as it comes configured with 16x microstepping and interpolation to 256. Mechanically I won't resolve any finer than 16 micrby Koko76 - Duet
Re: Duet WiFi details published, pre-order window open - 8 years ago
QuoteCalvinx66 Hi Guys The Vat thing is a very valid point, one that I didn't notice, I apologize. @ Tony are you guys able to supply the 5v Daughter board ? As I want to run two Z axis motors (P3Steel) without having to make an adapter myself !! (Being lazy I know) Regards New board supports two Z motor connectors on board, no adapter needed. Have a look at the website, many questions answby Koko76 - Duet
Re: Can I manufacture a 1mm nozzle using 3 D printing? - 8 years ago
QuoteDyze_Design Actually, carbide is very hard to be 3D printed since it is a ceramic. Most tungsten carbide tools are actually tungsten carbide "powder" bonded by cobalt (WC-Co). Might want to research that one a bit more. It can be done, but if part geometry is conducive to traditional methods cost will be cheaper.by Koko76 - General
Re: Ring Terminals for Extruder Components - 8 years ago
Quotedeckingman As DD said or you could use a thicker wire gauge if you are worried. You might want to consider using thicker gauge wires for the stepper motors in any case. I believe that they are more likely to be affected by the resistance of long cables as they may draw in the order of a couple of amps. As an alternative to thermistors and if you want more accurate temperature measurementsby Koko76 - Reprappers
Re: aliexpress dropping bearing and ball screw? - 8 years ago
Export controls on CNC machines aren't anything new. There are a number of higher precision machines that carry sensors to detect motion of the machine after installation and will disable the machine control until serviced. This is to prevent legal countries from buying the machine and then being paid to have it shipped elsewhere. I highly doubt that export is the reason they are being pulledby Koko76 - General
Re: First 3D printer electronics with built-in WiFi released - 8 years ago
Quoteo_lampe Regarding the external WiFi antenna: Wouldn't it be nice to have a replaceable WiFi board? ESP8266 is available with an 4x2 header... This way a customer who doesn't need ( or doesn't care about ) FCC and CE certification can choose a module on their own. You know, with OSHW you could just spin up your own variant. It's always nice from the customer perspective to get what you wantby Koko76 - General
Re: First 3D printer electronics with built-in WiFi released - 8 years ago
I received my beta unit yesterday and got it hooked up. It replaced a Duet 0.85 in my delta. The new drivers greatly reduce both noise and vibration. Previously when printing slowly you could feel vibration in the carriage if you rested a finger lightly on it. Now that vibration is all but gone. I've only tried the default 16 micro steps with interpolation to 256, I'm going to try some diffeby Koko76 - General
Re: Duet development news - 8 years ago
Mine came in today, just got finished switching over the delta. Wow doesn't quite cover it. I'm using the default 16micro steps with interpolation, and boy is it quiet! Much less vibration at lower speeds too. Before I could feel noticeable vibration in the carriage while holding a finger against it during printing. With these drivers it is greatly reduced. Web setup was easy, and upload spby Koko76 - Duet
Re: My coreXY design is progressing to the build stage - 8 years ago
If you have a 1/16" (close to 1.5mm) and make 2 passes you can cut a 2.2mm slot. It's not great practice to use a cutter the exact width you are trying to cut in general. You will get better finishes with lower cutter engagement.by Koko76 - CoreXY Machines
Re: Pololu geared DC motor 30g prototype extruder - 8 years ago
Quotedc42 Quoteroboprint Quotedc42I am watching this thread with interest, because if it is successful then I'll look at designing a servo-controlled motor driver expansion board for the Duet WiFi. But I think it has to be for BLDC motors. But with just STEP/DIR interface for BLDC drivers or you have plans to implement firmware-side control of driver's feedback? For example to slow down (or stopby Koko76 - General
Re: Duet development news - 8 years ago
Quotedc42 Yup, I can't read, totally missed the I term when I read it yesterday. Thanks for your patience and for your continued work!by Koko76 - Duet
Re: Can I manufacture a 1mm nozzle using 3 D printing? - 8 years ago
Quotematrix1781 Hi I am a newbie here and dont know much about 3D printing. I was wondering if a nozzle with 1mm diameter and 0.8mm length can be manufactured using 3D printing. Conventional nozzles are made out of tungsten carbide and it is difficult to manufacture such short lengths in that manner. Can 3D printing achieve this? If you are actually trying to make something from tungsten carbideby Koko76 - General
Re: Duet development news - 8 years ago
Quotedc42 QuoteKoko76 So with the gory details out in he open now, are you able to talk about to what extent higher step rates have been tested? I have a delta with 1.8 deg/step motors and 15t pullies, 106.666 steps/mm. Running at 24v. I'd like to get at least 64 micro steps if not 128, and I'd like to hit travel speeds of 200mm/sec. I know you run .9deg/step motors with 20t pullies Dave, howby Koko76 - Duet
Re: Duet development news - 8 years ago
So with the gory details out in he open now, are you able to talk about to what extent higher step rates have been tested? I have a delta with 1.8 deg/step motors and 15t pullies, 106.666 steps/mm. Running at 24v. I'd like to get at least 64 micro steps if not 128, and I'd like to hit travel speeds of 200mm/sec. I know you run .9deg/step motors with 20t pullies Dave, how high have you pushedby Koko76 - Duet
Re: Filament feed indicator idea. - 8 years ago
Surface roughness gauges work on a similar principle, dragging a stylus over the surface and gving you a reading for peak and avg. They are pretty expensive, but measure much finer than you are talking about. Might be something to look into.by Koko76 - General
Re: Duet development news - 8 years ago
QuoteT3P3 Quotedc42 Quotesgawad Just preordered Is there a way to get X,Y,Z,E0,and E1 (enable, step and dir) out? That would require 15 extra connectors pins obviously or are the test points large enough? I was thinking for my large build that if 2 amps are not enough I would get some gecko or such. I guess it would be relevant at least for x, y and z since it's a delta that would mean a totalby Koko76 - Duet
Re: Duet development news - 8 years ago
Excellent news all around! Hope that they don't run out of the beta's before they get to me on the list For the time being I'm going to put it into my existing delta, the drivers should make a decent impact there. I have to put my h-bot build on a tiny hold, as I'm moving house soon, but I'll certainly be putting one in there as well. Nice work!by Koko76 - Duet