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Rostock, Kossel, Simpson, 3DR, and more. See: http://reprap.org/wiki/Category:Delta. Previously named "Delta Robots and Stewart Platform"
Re: My ongoing 'biggee' Kossel development - 9 years ago
Quotedc42 QuoteLarsK Hello, I don't have much delta design experience but the following things strikes me: The carriages are really wide. I understand what you say about aspect ratio (rod spacing to rod length) but will the tolerance in your rails not create problems with slack in the setup? As tried to illustrate below. For that reason it seems attractive to have the rods closer together uby LarsK - Delta Machines
Re: Manual motor movement and saving the steps - 9 years ago
It is a little late but who knows if somebody comes across this in a google search or something, so; No. It is not possible. You need an optical encoder, hall sensor or other type of rotary encoder. See: (or a linear but that would change the setup) This limitation - Not being able to get a feedback of steps moved - is one of the biggest limitations to stepper motors in 3d printers because itby LarsK - Stepper Motors, Servo Motors, DC Motors
Re: Experience with magnetic joints - 9 years ago
Quotejanpenguin @LarsK The effector shape is familiar to a cheap Kossel Kit from China. It has design flaw that creates lifting of diagonal rods when the effector moves to the edge. I spent hours to fix it with another builder who bought the Kossel kit. Replacement of six diagonal rods, installation of springs didn't solve the problem. Thank you for saving me a lot of time. It was my plan toby LarsK - Delta Machines
Re: My ongoing 'biggee' Kossel development - 9 years ago
Hello, I don't have much delta design experience but the following things strikes me: The carriages are really wide. I understand what you say about aspect ratio (rod spacing to rod length) but will the tolerance in your rails not create problems with slack in the setup? As tried to illustrate below. For that reason it seems attractive to have the rods closer together unless your rails areby LarsK - Delta Machines
Re: Looking for Kossel 800 Assembly instructions - 9 years ago
I should add that the lowest picture with the magnetic rods disconnecting is not a software error. I misinterpreted it as software problems at that time. I do now believe it is either the magnets which are not strong enough or - and more likely - a fundamental design error. See: The problems with the magnetic rods have been a showstopper for my use of the printer. I simply cannot trust it toby LarsK - Delta Machines
Re: corexy vs non-intersecting corexy: does it make any difference when used with spectra/kevlar line? - 9 years ago
Yeah, it can be a little hard to see. I have not actually build the entire printer yet so I am not sure of its success. Only made the demo that I showed in the photo. That works really promising though. I actually think it can be combined with printed 2020 profiles (my existing printer that I also showed a photo of previously uses linear rods). I pretty early decided I wanted to build more machby LarsK - CoreXY Machines
Re: Experience with magnetic joints - 9 years ago
I have the kossel K800 with countersunk magnets like you say. I also now have some normal round magnets that I would like to somehow implement to improve performance. My performance is probably not enhanced by one of my countersunk being broken but there is no system in where it disconnects. Some days one side, another day another... In the picture you see one of my round magnets put on the steby LarsK - Delta Machines
Re: corexy vs non-intersecting corexy: does it make any difference when used with spectra/kevlar line? - 9 years ago
Quoterealthor Yes of course I get that, I was actually summing the general consensus on this thread and others. I believe that a well built machine will perform the same with all variations of corexy as I see many successful incarnations of all these variations. It is so simple and easy to understand that I am almost tempting into it even if I kind of sworn to rep-rap mentality, therefore thinkinby LarsK - CoreXY Machines
Re: Experience with magnetic joints - 9 years ago
Matthias- so the old magnets that you glue the ball to will also add to the magnetic force or how? I have some new round magnets that I would like to use to improve mine but not sure how I can go about thatby LarsK - Delta Machines
Re: Kossel mini Y coordinate error after Nth layer - 9 years ago
Maybe I am misreading your post, but remember that the fan should be cooling the stepper drivers ( those on the ramps board) . the stepper motors them self can be allowed to get quite warm without problems.by LarsK - Delta Machines
Re: Kossel Mini nozzle wont extrude, clog instantly, help ! - 9 years ago
Quotewfcook I am not arguing for arguments' sake; I would genuinely like to know. I would also like to know. For that reason I am waiting for Lerathel to do the steps I lined out and then I am sure our combined knowledge will have this problem solved in no time.by LarsK - Delta Machines
Re: corexy vs non-intersecting corexy: does it make any difference when used with spectra/kevlar line? - 9 years ago
My apologies for confusing the slicer with a geared corexy I assumed that it was the same concept as this By Nicholas That is a geared in the way that the pulley combination halves the movement compared to a normal setup. On the slicer the ratio of movement looks to me to be like the core. Higher resolution on movement is not unconditionally good due to belt elasticity and speed of steppeby LarsK - CoreXY Machines
Re: Kossel Mini nozzle wont extrude, clog instantly, help ! - 9 years ago
If you read my post above you will see that I present a good number of possible things to investigate.by LarsK - Delta Machines
Re: Kossel Mini nozzle wont extrude, clog instantly, help ! - 9 years ago
If he has so high temperatures on his upper heat-break that it dries out any normal CPU paste then he has an underlying problem. Applying better and more sophisticated grease is symptom treatment. End of story.by LarsK - Delta Machines
Re: corexy vs non-intersecting corexy: does it make any difference when used with spectra/kevlar line? - 9 years ago
As for intersecting or not intersecting (or in different planes as it is also called) - For a spectra line I would go for different planes because the spectra lines is so thin that the difference will be just ~4 mm ish apart. My belt driven coreXY is on the same plane (intersecting). For belts you need to separate the planes by the belt width plus a small gap.This makes the carriage part a littlby LarsK - CoreXY Machines
Re: Kossel mini Y coordinate error after Nth layer - 9 years ago
If you have a consistent problem on one part you can try to turn it like 90 degree and then slice it for that. If the printing error is then also turned 90 degree it is the slicer. If it continues to be in the same direction it is your printer. My guess is overheating of the stepper drivers. Slipping belts and missing steps on a kossel is really rare and I would expect it to be present much morby LarsK - Delta Machines
Re: Kossel Mini nozzle wont extrude, clog instantly, help ! - 9 years ago
Hello, Using thermal grease is symptom treatment - Not problem solving. If it worked as a quick fix then sure. But now you should try to find the root cause for your problems. Also if you have 130 degree on the upper part of the heat break you have a serious problem. For starters we need to know what kind of e3dv clone you actually have and your setup (what kind of cooling you have, etc). Forby LarsK - Delta Machines
Re: Kossel mini Extrusion Problems - 9 years ago
Hello, As Tadawson says you can just ignore the popping for now. The cause for hotend blocking can among many be the following: 1) There is a space between the heatbreak and the nozzle. As shown here: 2) Melted plastic gets into your teflon tube where it sets and blocks 3) The temperature is too low leading to "strange" hotend behavior 4) Foreign particles blocking nozzle - If your plaby LarsK - Delta Machines
Re: Feel lost - 9 years ago
Hello, The problems you are presenting can be: * Lag of tightness in belts. * Incorrect rod length / horizontal length * Incorrect setting of end-stops (nozzle not in perfect center) * Bad nozzle temperature * First layer height For sure a Z- probe would help greatly in determining what is going on.by LarsK - Delta Machines
Re: Feel lost - 9 years ago
Hello, I don't understand what you mean when you say the chrome is comming off. Is the carriage loosing contact with the rod so that it is only secured on one of the two rods at times ? That is unacceptable and will for sure give issues. If you just mean that the surface treatment is failing then no worries for the time being. A z probe would make troubleshooting much much easier as your printby LarsK - Delta Machines
Re: Feel lost - 9 years ago
Well. Try to print a lot slower. Like half of what you do. Try to push your hotend and see if it the system is obviously lose. Do you have a z probe ?by LarsK - Delta Machines
Re: Feel lost - 9 years ago
You hotend shaking is not related to the magnets (at least I can't see how it should be). Vibrations have to come from somewhere and that is most likely your carriage. Try to move each by hand and see how that goes. They should be really lose and not meet any resistance. You should be able to make very nice prints with 0.6mm nozzle. The only limitations are the smallest radius you can make andby LarsK - Delta Machines
Re: Motor with too little torque - 9 years ago
Hello, Ok, your situation is a little different from what I first imagined. Some important points which are not always 100% that way but which can generally be counted on: * Digital electronics fails the same way as it works - As 1 or 0. Either it works or it does not work. If it is a integrated circuit error (Arduino or Driver) then the error will not be load dependent - It just would not ruby LarsK - Stepper Motors, Servo Motors, DC Motors
Re: Motor with too little torque - 9 years ago
I am unclear what motors you are having problems with. In your first post (the topic) you use plural (motors) but later and in your photos you just talk about one motor. In short, I would like to understand if; Is it correct that all other motors are working except for the X axis? Is it correct that you tried to swap the working extruder motor to the x axis and in that position and loaded itby LarsK - Stepper Motors, Servo Motors, DC Motors
Re: Feel lost - 9 years ago
QuoteTaz-dig asbo, I have no issue pushing the filament through, I can feel the back pressure though and I am concerned this hot end may not work for this machine.It does extrude, but it does it in a horrible fashion. I think due to the slipping on the filament. LarsK, I have a Chinese copy and have ordered a real one from E3dv6 to make sure this is not the issue. I have multiple nozzles and wiby LarsK - Delta Machines
Re: Feel lost - 9 years ago
Buy a new nozzle (just the nozzle) and either buy as or drill up to 0.5 or 0.6 and use that while you commision your printer. Also your hub should never slip on the filament. You need to adjust the power on the extruder motor so that it skips steps on the stepper instead of grinding down your filament. This is for two reasons; 1) If the blocking is solved it wont have grinded itself into the fiby LarsK - Delta Machines
Re: Prusa i3 restarts once hotend and heated bed reaches temp - 9 years ago
Quotewaynes I will try feel the wires again tonight see if they are hot after the restart. All the terminals are screwed down tight, hang the bed on its own doesn't restart only if both bed and extruder are on. Amd in a little lost with the regulator mechanism you said. What's that? Also the psu im using is a xbox 360 one and has been fine so far. With regulation mechanism I meant to say theby LarsK - General
Re: Prusa i3 restarts once hotend and heated bed reaches temp - 9 years ago
1) Just after the restart have a feel on all the wiring going into your control. Especially any connectors. See if they are hot. 2) Verify all screw terminals are completely screwed down. 3) Try to heat-up the heatbed and then turn it off to see if that also makes it restart. 4) Try to change the regulation mechanism so that the heatbed is bang-bang instead of regulated. Strange restarts canby LarsK - General
Re: "Project Locus" - *gasp* My Plastic Frame - CoreXY Build Thread - 9 years ago
Quotedougal1957 QuoteLarsK It is an interesting design but I am not clear why you think this will help wobble? Wobble is the lag of centricity of you screw. When it rotates it pushes your carriage from side to side. For this reason you should see that the wobble in your printed pieces is exactly with the distance of the pitch on your screw. The system you have made will only help if you have thby LarsK - CoreXY Machines
Re: "Project Locus" - *gasp* My Plastic Frame - CoreXY Build Thread - 9 years ago
It is an interesting design but I am not clear why you think this will help wobble? Wobble is the lag of centricity of you screw. When it rotates it pushes your carriage from side to side. For this reason you should see that the wobble in your printed pieces is exactly with the distance of the pitch on your screw. The system you have made will only help if you have the problem with your linearby LarsK - CoreXY Machines