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General discussions. For specific printers / electronics / fabrication methods / softwares, please see other sections.
Re: 4 months in 6 minutes - 1 year ago
Quotethe_digital_dentist Looks like a quality build, as usual! Thanks. Coming from you Mark, I'll take that as a compliment.by deckingman - Developers
4 months in 6 minutes - 1 year ago
I've just posted a little video on my YT channel that you might (or might not) like. Essentially it condenses the 4 months of my new printer build, from concept through design, manufacture and assembly to working machine, into 6 minutes. Being "all metal" (no printed parts other than those needed for electrical insulation purposes), it's hardly a RepRap but these forums long ago departed away froby deckingman - Developers
A side by side comparison between a PT1000 and a "normal" NTC - 1 year ago
One of my YT subscribers sent me a donation via PayPal with the proviso that I use it to purchase a PT1000 temperature sensor. Personally I would have preferred to spend the money on something more useful but beggars can't be choosers as the saying goes. Anyway, I felt a certain moral obligation to not only purchase a PT1000 cartridge, but also to devise and run a side by side (literally) compariby deckingman - General
Re: How variable does air cooling need to be? - 1 year ago
Mike, This may, or may not be of some use but some time back, I investigated the effect of deflected part cooling air on the temperature inside the nozzle. The issue being that deflected part cooling air can affect the actual nozzle temperature but that the sensor inside the hot block is somewhat isolated from that deflected air so does not react to it. So I guess my answer to your question is tby deckingman - General
Duet 2 Ethernet for sale. Also a Duex5 expansion board. - 1 year ago
To help fund my new printer build, I need to raise some cash. I have a genuine Duet 2 Ethernet board for sale and also a Duex 5 expansion board. These were taken off my printer when I changed over to Duet gen 3 and were in full working order. I'm looking for offers around half the current retail price so around £80 for the main board and around £50 for the expansion board. At those sort of pricby deckingman - For Sale
Re: The world's first 6 input, single nozzle, multi-material hot end? - 2 years ago
I'm resurrecting this old thread because, after a long and bumpy road, I've finally developed my 6 input hot end to the point where I can now print and switch between, almost any filament type from Carbon fibre Nylon, to flexible filaments such as TPU, whilst retaining the ability to combine similar filament types for multi colour printing. Link to YouTube video here if anyone is interested - it'by deckingman - Developers
Re: New year's resolutions - 2 years ago
I'm hoping to perfect my 6 input multi-material hot end which coming along nicely so far. I just need to think of something useful which needs to be made using multiple materials - I'm getting close to a solution - now all I need is to find the problem that it will solve Maybe I need another hobby which requires parts that need to be printed using multi-materials. But No1 for me is visit my onby deckingman - General
DIY non-stick coating for nozzles and hot ends - 2 years ago
I've just uploaded a short video about a spray which I have found to be remarkably good at preventing filaments from sticking to the outside of nozzles and hot ends. Hope this might be useful to othersby deckingman - General
Re: The world's first 6 input, single nozzle, multi-material hot end? - 2 years ago
Part 4 is out now if anyone is interested. I've tested extrusion with a wide range of filaments from lowly PLA/PET-G/ABS to things like Carbon Fibre Nylon, PC-ABS, Graphene PLA, Composite HTPLA, PVA, Polypropylene and TPU, at varying nozzle temperatures up to 290 deg C whilst maintaining all the other 5 loaded filaments at much lower temperatures. I'm very encouraged by the results which show thaby deckingman - Developers
Insane PLA melt rate. Another waste paper bin, this one in 73 minutes. - 3 years ago
Following on from my fairly crazy melt rate tests using my 6 input multi-material hot end with PET-G, I've printed another waste bin but using PLA this time. With the same 1.5mm diameter nozzle, 1.65mm layer width, 1.0mm layer height, I achieved a reliable print speed of 80mm/sec (the extruders started skipping at 90mm.sec). It's only 7 minutes - watch to the end to see what the insane melt rateby deckingman - Look what I made!
Re: A functional PET-G waste paper bin printed in under 2 hrs - 3 years ago
BTW, that's how the high melt rate is achieved. Effectively there are 6 parallel melt chambers which "pre-heat" the filament before they reach the nozzle block. Not only does that give a vastly increased surface area, but also for a given flow rate from the nozzle, each of the 6 filaments contributes one 6th. So effectively it takes 6 times longer for each individual filament to pass through itsby deckingman - Look what I made!
Re: A functional PET-G waste paper bin printed in under 2 hrs - 3 years ago
Quotethe_digital_dentist Interesting filament. Am I seeing bubbles or is that some special additive in the filament to make it look that way? Is that a mix of different filaments or is the color shift a property of a single filament? You obviously haven't been keeping up with my other videos - but I forgive you It's PET-G that's about 6 years old and which has absorbed a fair amount of moistureby deckingman - Look what I made!
A functional PET-G waste paper bin printed in under 2 hrs - 3 years ago
Following on from my other post about exploring volumetric flow rates with my 6 input multi-material hot end (https://reprap.org/forum/read.php?2,887063), I decided to use up some more of this 6 year old PET-G and make something mildly useful. It's a functional waste paper bin printed in under 2 hours which serves to illustrate that 3D prints can grow faster than mushrooms. Link here -by deckingman - Look what I made!
Re: Pretty crazy PET-G melt (volumetric flow) rate - 3 years ago
QuoteDust That is a decent flow rate Not bad, considering it's PET-G which is relatively high viscosity. I could probably have got it a bit higher if I'd used elevated temperatures but then people would say it's not a fair comparison. Having said all that, wait until you see what I achieved with PLA!by deckingman - Developers
Pretty crazy PET-G melt (volumetric flow) rate - 3 years ago
I've been exploring melt rates for PET-G (high viscosity filament) with my latest multi-material hot end. By using all 6 inputs with equal mixing ratio, I got some pretty crazy results. Here is a link to a YouTube video showing a print with a 1.5mm diameter nozzle, 1.65mm layer width, 1.0mm layer height and print speed around 46mm/sec. . The volumetric flow rate is shown at the end.by deckingman - Developers
Re: The world's first 6 input, single nozzle, multi-material hot end? - 3 years ago
Part 2 is out now if anyone is interestedby deckingman - Developers
Re: Inverting directions for mixing extruder - 3 years ago
I just stumbled across this. I have a fair amount of experience using mixing hot ends and I doubt what you want to do is possible (but it might be). The reason being that a G1 extruder move is always in one direction. You could possibly reverse the overall direction by using absolute extruder moves, rather than relative or by using G10 retract. But all that happens with a mixing hot end is that eby deckingman - Developers
The world's first 6 input, single nozzle, multi-material hot end? - 3 years ago
This is a follow on from my earlier multi-input mixing hot end designs. I believe it might be the worlds first hot end capable of printing multiple materials at up to 350 deg C whilst maintaining the temperature of other loaded filaments at less than 200 deg C. That is to say with this single hot end, I could potentially print a 6 part object with each part made from a different material rangingby deckingman - Developers
(Mostly) 3D printed Xmas Pyramid revisted - 3 years ago
I have revisited my (mostly) 3D printed Xmas Pyramid. I have replaced the previous fixed speed, fixed voltage, geared (noisy) motor with a stepper motor, driven by a TMC2208 driver module which has made it silent (at least to my ears). I've also replaced the LEDs with new, WS2812 addressable LEDs and use a Wemos D1 mini running ESP home to simulate a flickering candle effect. Finally, I have madeby deckingman - Look what I made!
Re: Looking for new contol boards and firmware - 3 years ago
QuoteMechaBits looks like robo spam to me and to go back to Deckingman, and end that convo, interesting stuff, luckily i'll never run into those issues, good to hear it's all working fine, though if you keep going with the printer development it will either outgrow the duet 3 or the room. Do you plan on developing other ideas for other printers where you would need even more out of the equipmentby deckingman - General
Re: Looking for new contol boards and firmware - 3 years ago
QuoteNovaHuta I'm surprised at the focus on stepper and interrupt rates. With the latest range of TMC drivers and the like, the interrupt rates aren't so important. Like with 2209 or 2208 even. The microstepping is now all 'simulated' in the driver and therefore you get microstepping without the interrupts. I don't see any mention of interrupt rates anywhere in this thread. You aren't conflatby deckingman - General
An easy way to calculate filament left on a spool - 3 years ago
I made a little video detailing an easy method of calculating the amount (length) of filament remaining on a spool using nothing more than a ruler or tape measure and the spread sheet that I created and which is linked to in the video. For sure there are other ways of doing this but I believe this is arguably the easiest because it can be done without unloading the filament and with the spool "inby deckingman - General
Re: Looking for new contol boards and firmware - 3 years ago
QuoteMechaBits I was a little shocked that you have outgrown your duet & all the expansion possibilities, & what must have been quite a close exchange of ideas to work on, I doubt i'd have ever outgrown it's use...but couldnt decide to spend that amount knowing that if I went down the cnc mill/lathe route something else would be better suited. Break out boards so cheap, currently waitingby deckingman - General
Re: Looking for new contol boards and firmware - 3 years ago
Hi Mike, Yes, Klipper has been mentioned to me a few times over the years. I have to say that I hadn't really taken much notice until recently. I particularly like the distributed approach - it's useful on a large format machine with many motors. In that respect, Duet Gen 3 would appear to be a good idea with it's CANbus expansion boards. But I don't like the fact that if one wants (say) 3 stepby deckingman - General
Looking for new contol boards and firmware - 3 years ago
Not sure where best to post this, so I've settled on the "General" section. In a nutshell, it's time to move on and away from Duet products and RepRap firmware. It's a long story and one that I don't want to go into here. But I've only ever used Duet Hardware and RepRap firmware since getting my first printer which was a RepRapPro Mendel (tricolor) and which used the very first Duet 06 boards. tby deckingman - General
Re: My 6 input (5+1) mixing hot end - 4 years ago
@boggen79 May I respectfully suggest that you start your own thread, rather than keep posting your thoughts and ideas in this thread. I've been on this planet for some 67 years, the last 50 or so practising engineering in one form or another. I've spent much of the last 5 years or so doing multi colour printing, and most of the last 4 years using mixing hot ends. So I'm already fairly conversantby deckingman - Developers
Re: My 6 input (5+1) mixing hot end - 4 years ago
I thought that I had made it clear that I have discounted using any sort of "paddle mixer" because of the high volume of molten plastic, the inability to reduce nozzle pressure for non-print moves and the difficulty of sealing the shaft. If I was to choose that route (which I'm not), I'd likely use some sort of high Curie temperature rare earth magnets for the rotor part and excite these using exby deckingman - Developers
Re: My 6 input (5+1) mixing hot end - 4 years ago
Quoteleadinglights .............................. The arrangement used by deckingman is very similar to that used in cylinder blocks of i.c. engines - where the cooling is much more demanding. ................................. Haha, that made me chuckle. You are exactly right. Being a (retired) automotive engineer by training, it's exactly like an engine block. For info, I've taken on boarby deckingman - Developers
Re: My 6 input (5+1) mixing hot end - 4 years ago
@boggen79. Don't apologise - you haven't upset me. Criticism is a good thing and everyone is entitled to express an opinion. In turn, I hope my reply didn't cause you any offence - I just happen to disagree with some of your ideas. For what it's worth, I happen to think that the entire process of making something using what is effectively just a robot controlled hot melt glue gun is somewhat archby deckingman - Developers
Re: My 6 input (5+1) mixing hot end - 4 years ago
Thanks for the critique. I haven't read every word because life is short, but I think I understand the gist of it. I did make note of the first sentence of you point 3.2. When you have a little more experience I think you will begin to understand that there are certain practicalities that have to be taken into account and which make most of your suggestions unviable. Aside from the significant cby deckingman - Developers