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Re: Dynamic load balancing \ force cancelling gantry - 6 years ago
Agreed. The reason for posting on these forums was that others might benefit. So the fact that the idea didn't give any improvement to print quality is still useful knowledge. Although it cost me some time and money, at least it might save someone else some time and money if they stumble across this thread at some time in the future. All knowledge is useful.by deckingman - Developers
Re: Dynamic load balancing \ force cancelling gantry - 6 years ago
Haven't seen anything like that. As it turns out, this whole thing has largely been a waste of time because even when the printer is doing it's "magnitude 8 earthquake thing", the prints comes out just fine. So although it does a very good job of stabilising the printer, there is nothing to gain by doing so. My own fault - I fell into the trap of finding a solution to a problem that doesn't existby deckingman - Developers
High speed, high volume flow rate printing - 6 years ago
Just finished some more testing and development along the lines of this title if anyone is interested. Be warned that it is a long and somewhat involved post. There is an associated YouTube video. It's about 25 minutes long but the first 12 minutes or so are probably the most interesting if you are short of time.by deckingman - Developers
Re: Dynamic load balancing \ force cancelling gantry - 6 years ago
Yes, completely separate gantry with the motors mapped to the existing CoreXY axes but direction reversed. Another crazy idea I had was some sort of rod attached to the X carriage, sticking up vertically but pivoting about a point central to the bed. Kind of like a plate fixed to the top of the printer or some way above, with a hole in the middle, through which the rod passes. Then a big weightby deckingman - Developers
Re: Dynamic load balancing \ force cancelling gantry - 6 years ago
@ MechaBits. Apologies, I read your comment at a bad time. You would not believe some of the sh*t comments I get on my blog. Fortunately, one advantage of having my own blog is that I have full moderator rights and have it set up so that I get to review any comments from new visitors, before they get published. I'd just deleted comments and barred a particularly obnoxious a***hole before I read yby deckingman - Developers
Re: Dynamic load balancing \ force cancelling gantry - 6 years ago
QuoteMechaBits This technology would be better used to pull cashpoints out the wall. Thanks man. It's always nice to know that the hours I spend experimenting and developing printing techniques and hardware, then writing up my findings, publishing them on a blog which I maintain at my own cost, doing videos, also at my own cost, all in the hope that others might benefit, is being appreciated.by deckingman - Developers
Re: Dynamic load balancing \ force cancelling gantry - 6 years ago
Quotewarbunniex i wonder if the pendulums they use in skyscrapers could be used in deltas. imma have to go get a nice size ball of lead... thanks for the ideas!!! Oh trust me, I looked into Tuned Mass Dampers (that's what they are called). Relative to the mass of the structure, the mass of the damper is small. The problem is that they only really work at a specific frequency - usually the resoby deckingman - Developers
Re: Dynamic load balancing \ force cancelling gantry - 6 years ago
QuoteMKSA Coin test: For info, way back in the 80s, in a previous life, I used to tune engines for a living. That's in the days of carburettors, mechanical distributors, points, condensers, adjustable tappets etc. Even in those days, you could do that coin test with just about any 8 cylinder or more engine (providing it was European and a road car) once it was correctly tuned. Jaguar V12s wereby deckingman - Developers
Re: Dynamic load balancing \ force cancelling gantry - 6 years ago
Quoteobelisk79 Impressive looking results in the video. Is that all official OpenBuilds hardware or chinese equivalent? It's all official Open Builds hardware - I've read too many posts on various forums about peoples negative comments using "cloned" hardware which has failed. Most of the Open Builds stuff was bought from a company called "Ooznest" here in the UK but some of the first extrusionsby deckingman - Developers
Re: Dynamic load balancing \ force cancelling gantry - 6 years ago
QuoteMKSA Rolls Royce also uses the same one pound coin technique to check for their engine lack of vibration. But a frame house in the UK ??? Don't understand that - maybe something got lost in translation. The purpose of the dynamic gantry is to prevent the printer frame from shaking, not the house (which is mostly brick and concrete apart from the upper internal walls and floors - it's notby deckingman - Developers
Re: Dynamic load balancing \ force cancelling gantry - 6 years ago
When the print head is close to the bed, and because the bed is rigidly constrained from any side to side or back to back movement by the linear guides, then for sure the amplitude of the oscillations will be the same for the bed as the print head, so in theory it shouldn't matter. However, as the bed moves further towards the floor, away from the print head, then the amplitude of the oscillationby deckingman - Developers
Dynamic load balancing \ force cancelling gantry - 6 years ago
Just finished implementing this if anyone is interested Video here if you don't want to read the waffleby deckingman - Developers
Re: Is there a color mixing table or calculator for PLA? - 6 years ago
QuoteRoberts_Clif I would have to question the color mixing extruder, Thinking about it would this really mix the colors if just spit them out like aqua fresh toothpaste in a distinctive pattern. That's absolutely correct. As a long term user of Diamond hot ends, both 3 and 5 colour, I can confirm that they don't actually mix and what comes out of the nozzle is akin to stripey toothpaste. I oncby deckingman - Printing
Re: How many independent printheads are possible on one CoreXY? - 6 years ago
Quoteo_lampe The reason I asked this, was to find an excuse to build a new cable driven printer. I though of extruding ketchup, mayonaise, mostard a.s.o. simultaneously. Therefor a tool changing system would be less useful. Sounds like you planning a high tech hot dog stall. What about the onionsby deckingman - CoreXY Machines
Re: reprap 3d printer power consumption??? - 6 years ago
Not easy to measure as the things which consume the most electrical power are heaters and they are constantly being switched on and off in "bang bang" mode or controlled by PWM. I did a few tests with one of those plug type power meters. Just a cheap one so the results might not be all that accurate. Mine is a largish printer and I have a mixing hot end so use 5 extruders (sometimes all at oncby deckingman - General
Re: Mendel Pro Tricolor - 6 years ago
I had one too but have since sold it. It uses the Duet 06 board - the first generation plus an expansion shield for the additional stepper drivers. Someone managed to scrape or re-create all the web pages that showed the assembly and commissioning instructions but I can't find a link to it. It's out there somewhere.... It might be worth posting a question on the Duet forums. RepRap firmware iby deckingman - Reprappers
Re: Did something dumb. Ever happen to you? - 6 years ago
When you come to fit the new Duet board is when you find the old one - it's still on the printer - you only meant to take it off and box it up but didn't actually get around to it (played that game before). I buy things in bulk - for me it's tape measures and pens so I always buy packs of 10 at a time (and no, I can still only find one or two). Lost count of the number of screwdrivers and hex kby deckingman - General
Re: Favoured suppliers for bolts, washers, nuts? - 6 years ago
QuoteWesBrooks Thanks all for the hints. Got a while before I've got through the CAD work I want to do before building. Yeah, I didn't say where I was from in the first post but did in the second. The non-UK suggestions may still be useful for other people searching the forum for the same information. For common items, Screwfix will take some beating. You won't find small quantities but you'llby deckingman - General
Re: my rotary extruder 1 drive upto 4 hotends - 6 years ago
Neat. Quite an engineering challenge to get all the hot ends to end up with the same XYZ offsets but you seem to have managed it well. One quick question - does the mechanism always rotate in the same direction or does it move back and forth? Just thinking that if it always moved say clockwise, it's going to plait the filament.by deckingman - General
Re: An alternative to printed parts? - 6 years ago
I'd like to think that my printer is a RepRap as far as possible - even RepRap Pro Mendels (my first printer) had what were called "Minerals" consisting of metal items such as threaded rod, nuts bolts and screws. So in my case, I use OpenBuilds extrusion instead of threaded rod but otherwise most of the original parts were printed on my RepRapPro Mendel and since then, in true RepRap style, all tby deckingman - Reprappers
Re: An alternative to printed parts? - 6 years ago
Quoteleadinglights The opinions as such are not disrespectful, who could disagree with trying to get as much quality as possible in a 3D print. Having said that, it makes me sad that many of the regulars express a dislike of the underlying philosophy of the RepRap organization. Commonly expressed opinions are that glass build stages, 8 bit controllers, round rods as guides and printed componentsby deckingman - Reprappers
Re: An alternative to printed parts? - 6 years ago
Quotethe_digital_dentist I have never bought into the reprap philosophy because it is incompatible with maximizing print quality. ................. I appreciate the sentiment but that's a hell of a thing to say on the RepRap forums don't you think?by deckingman - Reprappers
Re: Another multi coloured Aria by Loubie - 6 years ago
QuoteShank man If that video had been a hour long I would have watched every second of it. I never grow tired watching your printer and my attention span for watching 3D printers videos is about 8 seconds. Great camera work too Ray Awwww, thanks! I really appreciate that. I'm sort of getting the hang of this 3D Printing stuff but I've still a lot to learn about putting videos together. I likeby deckingman - Look what I made!
Another multi coloured Aria by Loubie - 6 years ago
I managed to do one of these before but it took a few attempts and a bit of "manual intervention". Recent printer upgrades have cured the issues so I wanted to try another one - just to make that everything worked. Video is here if any is interestedby deckingman - Look what I made!
Re: Help needed - Uneven segment lengths on circles - 6 years ago
Quoteo_lampe If possible, I'd suppress pressure advance below a certain track-length in Firmware. Is that a possibility? Would it help you, Mike? This has been raised numerous times. If it fixes my problems I'd love to see it. I could always print circles and arcs at slower speeds so that pressure increase is less of a problem. In theory, I think that what should happen is that there is a cumulaby deckingman - Slic3r
Re: Help needed - Uneven segment lengths on circles - 6 years ago
Quotedc42 Uneven segment lengths within arcs don't cause issues with pressure advance, but uneven extrusion rates do. Try putting the XYE values into rows on a spreadsheet, calculate the XY distance moved in another column, then divide the extrusion amount by that to get the extrusion rate. Then you can see whether it is consistent or not. What??? Well I must have misunderstood what you said wheby deckingman - Slic3r
Help needed - Uneven segment lengths on circles - 6 years ago
I have a problem which seems to be present in all versions of Slic3r including the latest dev release and all PE versions. Maybe it's me but I can't find any setting that will change the behaviour. The problem is that when slicing circles or arcs, I get (at what seem random times) uneven segment lengths. This in itself is no big deal as the objects print OK but I'm having problems with pressureby deckingman - Slic3r
My 5 colour CoreXYUV now has 5 Bondtech BMGs - 6 years ago
As title. Here is a link for anyone interested...........by deckingman - CoreXY Machines
Re: Staged heating extruder - 6 years ago
Quoteo_lampe Someone here made an experiment with a Diamont hotend. He could print way faster, when three filament path's were used simultanously. ......................................... That would be me then (https://somei3deas.wordpress.com/2017/06/22/exploration-of-print-speeds-with-a-diamond-hot-end/). Now that I have 5 colour mixing hot end, seeing what melt rate I could get out that is oby deckingman - Mechanics
Re: Why 16x micro stepping is not a good idea for mixing hot ends - 6 years ago
Quoteo_lampe I meant, that the .stl files already inherit the segmentation of arcs and circles. On CNC machines arcs are described with G2&G3 moves. If we had a slicer that could produce such Arc moves ( based on other object format than .stl) , it would be seen as one long move from RRF and the pressure advance would work better. Maybe it's an option to use pressure advance from one retractiby deckingman - Printing