Show all posts by user
General discussions. For specific printers / electronics / fabrication methods / softwares, please see other sections.
Re: My 6 input (5+1) mixing hot end - 4 years ago
Thanks Mike. I've used those sort of clips plenty of times in the past - they are very common in automotive applications. I didn't have any the right size to hand - hence the cable ties. But by way of an update, where the flexible silicone tubing slides over the less flexible but "non-barbed" PTFE tubing, cables ties don't work well. They don't form a perfect circle when tightened. Having moppeby deckingman - Developers
Re: My 6 input (5+1) mixing hot end - 4 years ago
I'm now up to part 12 of this particular journey. But I've moved over to posting further updates on my YouTube channel instead of my blog. Link here if anyone is interested (Parts 1 to 11 are still on my blog ).by deckingman - Developers
Re: New motion planning tricks with my CoreXYUVAB - 4 years ago
I've refined my original code so the extruder gantry now gets "parked" in the centre of any small features (<40mm n X and <30mm in Y), and added a few other tricks.by deckingman - Developers
Re: New motion planning tricks with my CoreXYUVAB - 4 years ago
Quoteleadinglights A very interesting video. It makes me want to video/document my own humble efforts. Mike You keep saying that Mike - go for it. (I now have the perfect excuse for when my wife catches me talking to myself - I just say "I'm recording something for a video dear").by deckingman - Developers
New motion planning tricks with my CoreXYUVAB - 4 years ago
Some of you might find this interesting (on the hand you might not) .............by deckingman - Developers
The effect of deflected part cooling air on nozzle temperatures. - 4 years ago
I've put a small thermocouple inside a nozzle and attempted to evaluate the effect that deflected (as opposed to direct) part cooling air flowing over both brass and hardened steel nozzles might have. The results might surprise you (then again, they might not).by deckingman - Developers
Re: My 6 input (5+1) mixing hot end - 4 years ago
Quoteleadinglights Thank you deckingman, your blog is always an interesting read with both data and discussion. I will continue to watch with interest and it may spur me into starting a blog myself on my humble efforts. Mike. Well some say that my posts are too verbose but then again, there seem to be quite a few pedants about who pick up on the tiniest (missing) detail. Thanks for the kind worby deckingman - Developers
Re: My 6 input (5+1) mixing hot end - 4 years ago
Part 3 is now live on my blog if anyone is interestedby deckingman - Developers
Re: My 6 input (5+1) mixing hot end - 4 years ago
The next step of my journey along this particular road is now live on my blog for anyone who is interestedby deckingman - Developers
Re: My 6 input (5+1) mixing hot end - 4 years ago
Thanks for the ideas guys. I'll see how the air cooling works out because those small fans should be almost (to my ageing ears) silent if not efficient. And it's simple....by deckingman - Developers
Re: My 6 input (5+1) mixing hot end - 4 years ago
Quotefrankvdh QuoteI don’t have a thermal imaging camera and my pension won’t stretch enough for me to buy one, so I’m trying to beg, borrow, or steal one. You can buy NoIR cameras for the Raspberry Pi... basically an ordinary camera without the IR filter. I don't know how good they are at thermal imaging, but maybe worth a try? Maybe someone else here knows? Some random thoughts... I wonder aby deckingman - Developers
My 6 input (5+1) mixing hot end - 4 years ago
I've made a bit of progress designing his beast if anyone is interested. That is to say, I now have a prototype that I can start testing (almost). Details on my blog hereby deckingman - Developers
Re: Ultimate z axis accuracy? - 4 years ago
Quoteruggb Based on the performance of my CoreXY printer, I keep thinking y'all are overthinking this Z drive. I have 3 screws driven by 1 motor/belt/pulleys .................................................... Same here. Everyone laughed at me when I elected to use 8mm x 1 single start lead screws. But with a lead of 1mm, it means that using a 1.8 degree motor I have 200 full steps per mm whicby deckingman - CoreXY Machines
Re: Is it still worth it to build? - 4 years ago
I'd say that it's largely down to personal preference. Some of us like to tinker, others may be less so inclined. Then again, different people have different skills and abilities. Some people may be comfortable with the design process but less capable when it comes to the practical skills needed to turn that design into a reality. Others may be comfortable with the practical "hands on" aspects, bby deckingman - General
Pull out filament storage rack - 4 years ago
Another post prompted me that others might be interested in the pull out filament storage rack that I recently made. Details here if anyone is interested The rack itself sits inside the new dustproof "booth" that I've made to house my printerby deckingman - Look what I made!
Re: AV Rack - Profile Selection (Newbie) - 4 years ago
How about using this stuff . Square section tube with plastic connectors. It comes under various brands, not just the one I listed, and is available in most parts of the world. It's quick and easy to work with, and the tubing is available in a variety of colours which might be more aesthetically pleasing than the slotted profiles that we use for 3D printing. I recently made a pull out filaments sby deckingman - Let's design something! (I've got an idea ...)
Re: Need to find X and Y positions of two nozzles - 4 years ago
How about printing a cube, starting with 100% infill. Do a few layers with one nozzle, then switch to the other nozzle and do another layer. Measure any offset, adjust and repeat. Then when it's as close as you can get, change to vase mode, (single wall), and repeat. Do quite a few layers like that which should be perfectly aligned. It may be that a finger tip is more sensitive to any differencesby deckingman - General
Re: Core XY build - feedback appreciated - 4 years ago
Quotefisher .................. a Core XY 'dream machine' based roughly on the E3D tool changer. I would apriciate constructive feedback on the design, its taken a fair few itterations to get to this point. Cheers! You asked for constructive feedback so here is my opinion for what it's worth. IMO the phrases "dream machine" and "E3D tool changer" don't really belong in the same sentence becaby deckingman - CoreXY Machines
Re: E motors stops working after 1 layer - 5 years ago
Quotedc42 Is the hot end maintaining temperature all the while? ................................It's not uncommon for the print cooling fan to cause a large drop in nozzle temperature when it turns on. I'd add to that "especially for the first few layers when the airflow can get deflected back from the build plate". Depending on the geometry of the cooling duct, as the print height increases, sby deckingman - Printing
Re: Can a poorly designed cheap machine be 'corrected' by software ? - 5 years ago
One slightly worrying trend that I have noticed is that in some instances "polishing a turd" as Mike so aptly puts it, has not only become acceptable but some people are deliberately removing parts in order to turn machines into "turds" so that they can then be polished. I'm talking about sensor less homing. This is something that Mr Prusa introduced for one reason only, and that is save a fewby deckingman - General
Re: CoreXY 2:1 belt ratio double torque and resolution ? - 5 years ago
Another idea which might be a little less complex than your OP, and one that I have considered myself, is to replace the motor with a shaft which would hold two pulleys - one 20 tooth and the other 40 tooth. Then mount the motors to the side with 20 tooth pulleys and a short belt to the 40 tooth pulley on the shaft. That would give you the 2:1 gearing. The reason why I had considered it was not tby deckingman - CoreXY Machines
Re: CoreXY 2:1 belt ratio double torque and resolution ? - 5 years ago
QuotePippy V-slots and wheels sure does simplify a printers mechanics, and doesn't appear to affect resolution/accuracy etc over other methods, I guess ? Well that kind of depends. The comment about accuracy and resolution is certainly true for OpenBuilds V-slot and proprietary Open Builds double bearing Delrin wheels running on "axels" which are supported at both ends, and then only if they aby deckingman - CoreXY Machines
Re: CoreXY 2:1 belt ratio double torque and resolution ? - 5 years ago
QuotePippy ........................Seems a waste to have the ability to go fast with normal setup (say 250mm/sec with 20 tooth pulleys) and not really be able to use it......................., My vote would be as DC42 says - simply use 0.9 degree motors. On the other, you could capitalise on the speed capabilities and print at 300 mm/sec plus as I demonstrated here and here Even if youby deckingman - CoreXY Machines
Re: Real acceleration during jerk - 5 years ago
QuoteArtemKuchin with 20t pulley 1 full step is 0.2mm, 2 full steps is 0.4mm If jerk take place in 2 full steps and it would be impossible to print details less than 0.4mm Which is clearly not the case, i can show you test print with details as small as 0.025 mm, crazy huh? (need 16t pulley though and good geared extruder). Microstepping does rise resolution and microsteps do move things around.by deckingman - General
Re: Real acceleration during jerk - 5 years ago
@ArtemKuchin Going back to your original OP, I don't think you understand "Jerk" as it is applied to 3D printers. It's not the same as in the physics sense which is the 4 derivative of position or if you prefer, the rate of change of acceleration. A slightly better term for 3D printing is "instantaneous speed change" although in reality there can be no such thing. "Jerk" is actually pretty horriby deckingman - General
Re: Dynamic load balancing \ force cancelling gantry - 6 years ago
Quoteo_lampe Quotedeckingman Someone I know suggested maybe putting casters on the printer, then designing a part to print that would make the printer do a little dance. That'd make a good YouTube video - "The worlds first dancing 3D printer". Sorry to say that, but I've beaten you regarding the dancing printer, because I tried caster wheels under my Prusa i3 a few years back. They wouldn't exaby deckingman - Developers
Re: High speed, high volume flow rate printing - 6 years ago
I don't think pushing force is an issue. If you can melt the filament fast enough, then it doesn't take much force to push it through. Something like an E3D titan or a Bondtech BMG (my personal preference) is more than up to the job. Only if you try to push filament into the hot end faster than it can melt, does force become an issue (but a higher force won't solve the problem or allow you to priby deckingman - Developers
Re: Dual drive extruder - 6 years ago
Quotedc42 QuoteSrek For me a reason to not do it is that it is unnecessary. I have thought about filament transportation with multiple points of contact, but in the end they did not offer any advantage. A well designed classic direct drive will develop enough force for well over 100mm/s. Another issue is size, such a setup will be larger than a single point of contact drive. You might find inteby deckingman - General
Re: High speed, high volume flow rate printing - 6 years ago
Quoteo_lampe I must've missed that thread. Very impressive What if you'd use one NEMA23 extruder instead of three Bondtech ( $$$ )? Approximately same weight or even less. Would it rip out the Bowden tube? Would it melt fast enough? (only one meltchamber instead of three). Maybe a longer melt chamber would do the trick... It's about the melt rate. It doesn't matter how hard you try and force thby deckingman - Developers
Re: Dynamic load balancing \ force cancelling gantry - 6 years ago
QuoteMbasecnc1975 I'm verry happy with your idea regarding this force cancelling idea. It could be the answer for me stopping my printer from walking off the table Someone I know suggested maybe putting casters on the printer, then designing a part to print that would make the printer do a little dance. That'd make a good YouTube video - "The worlds first dancing 3D printer".by deckingman - Developers