Quotephord pretty nice analysis...by realthor - CoreXY Machines
Quotelkcl [...]and that 10 or better 12mm rods with *DUAL* linear bearings PER ROD, mounted directly to a long single aluminium L-shaped bracket, was the way to go. we also concluded i believe that using the cheaper bearings and putting them in plastic housings was in no way sufficient to prevent see-sawing, and that getting the bigger "all-metal" linear bearings and mounting them directly to thby realthor - CoreXY Machines
Quotewidespreaddeadhead Quotegodefroi The other thing the carriage could desperately use is improved print cooling. Half of the 40mm fan is not really enough. Someone posted a remix on thingiverse for a blower fan attachment, might work well. You might be referring to this one, just stumbled on it earlier today: I thought a link/image could help.by realthor - CoreXY Machines
Solutia care o incerc merge la amandoua. Fiecare piesa se poate prinde si de profil si pe tzeava patrata. La profil scapi de jumatatea a doua de clama. Desi initial voi folosi profil, demonstratia era pentru o metoda usoara de a face cu profil patrat. Nu trebuie masina de gaurit cu coloana pentru ca gaurile nu trec prin abbele fetze ale tevii patrate, daca te uiti bine doar peretii adiacenti sunby realthor - Piața din centru
That's a good idea but it's pretty difficult to do so ... at least in the current setup: The Z rods are offset from the Y Rods vertical plane so in order to align them I should move them in the same plane to be able to use a square against their centers. But if I want to keep them the same width as the bed how can I ensure perpendicularity between them?by realthor - CoreXY Machines
The actual "procedure" is yet to be defined. There are some features in the design that will help aligning. The upper end of the rods will be inserted in holes in metal, just like solidoodle did it. The lower ends of the rods will float inside a 3-point-adjusting collar where I will work with small bolts to move it so that the bed goes up and down with ease. This should be a first level of gettinby realthor - CoreXY Machines
QuotefilipeCampos Loved your design, you have put some greats idea where... more questions: what is the size of the metal tube? 20x20? The mema17 motor will have enough force and precision without a reduction? The belt tension is made by the 2 screw on the top, correct? where do you fix theses 2 screws? looks like is missing one printed piece to fix the screws Are you planning to share the fileby realthor - CoreXY Machines
Hello, I planned 10mm rods for SCOUTcorexy's dual-supported Z platform but am wondering, as long as the bed is not cantilevered it might be sufficient to have 8mm rods (also considering that I use 3 rods). Here's a sketch: Thanks.by realthor - CoreXY Machines
Again, how are Z belts being tensioned? Are they closed loops the ones the smartrapcore guys send with the kits?by realthor - Smart_Rap
Hi, is there a smart(rapcore?) solution there that is simple enough yet it prevents a free-fall of the bed in the event of a current cut-off or some other electronic failure in the printer's electronics? I've seen on thingiverse some elastic catchers but I am not convinced by those. I am thinking some sort of 3d-printed (at least in part) centrifugal brake (but simple enough) or a counterweightby realthor - Smart_Rap
Quotethe_digital_dentist Cutting grooves in the plate to allow adjustability will be a little tricky. If I cut the plate narrower I can just make clamps that fit and then I won't have to mill narrow slots in the plate. Would slots that are open to the sides work for this? They could potentially be done with a vertical drill: I am not sure how the thin wall will react to the ripping forces oby realthor - CoreXY Machines
cam asa:by realthor - Piața din centru
Mersi de sfaturi, inca ma documentez, desi proiectez la ea de muult timp . Va fi un corexy dar ii trebuie multe piese printate si inca nu am reusit sa dau de baieti prin Timisoara (3dhubs sau otherwise) carora sa le dau comanda.by realthor - Piața din centru
When is it enough for you guys? I think we all have to learn something by being here but sometimes a "lesson learned" doesn't need so much insisting and bragging and showing how's got muscles and where does he come from. Intelligence and expertise is not all that matters in these type of communities, social skills are too, any some of us need too to take that as a "lesson learned" if they are asby realthor - CoreXY Machines
Quoteldanut Avem noi pe stoc motoare nema 17 noi de 1.7A la 60ron/buc si bare lineare la 25ron/m si rulmenti de 8mm la 6ron/buc si 10mm la 8ron/buc. Avem cam orice ai nevoie la preturi ok zicem noi. Iti pot da o lista pe private daca vrei. Dan. Da-mi pe PM. De la Iasi la Timisoara sunt curios cat ma scot cu transportul, ca ala o sa ma mananceby realthor - Piața din centru
da, nu mai are Nema17 era delistat de pe OLX l-am gasit dupa textul de la tine in google despre bare liniare (sau cum s-or numi pe la noi), again pe olx nada, dar am gasit asta: Cum vi se par preturile?by realthor - Piața din centru
Logic si la subiect. In general la motoarele care le-am vazut de la dezmembrari (in poza) nu am fost in stare sa imi dau seama daca in afara ca e stepper motor mai si poate ceva, nu am vazut sa scrie un amperaj etc, dar asta e si din cauza ca nu ma pricep ce sa citesc pe stickerele alea pe care nu se vede mare lucru anyway. Mersi de raspuns.by realthor - Piața din centru
QuoteMKSA Quoterealthor @MKSA you're not helping and this type of attitude is only perpetuating a tensed environment. What about some common sense in these forums ... Tensed ? No, just funny ! Common sense ? Not very common, reading your non sense ! I am just wondering, do you know nothing about everything or everything about nothing ? I'm glad you enjoy being a troll. You're wasting your preby realthor - CoreXY Machines
QuoteVDX ... here's a sketch to show the driving of a heated bed with a transformer and switching it with an AC-SSR (solid-state-relay): This can be useful since my ATX power supply might not be up to the task of providing the heated bed and dual hotend with enough power so an additional provider for current for the heatbed/hotends might be needed. ATX can only provide 12V anyway. I don't undby realthor - CoreXY Machines
@MKSA you're not helping and this type of attitude is only perpetuating a tensed environment. What about some common sense in these forums ...by realthor - CoreXY Machines
guys, I appreciate any piece of advice you give here for free and I take notes of everything but please try keep it cool ... This faceless communication does more harm than good in these types of argumentative discussions. I myself don't want to hurt anybody's feelings but my ultimate choice will make someone feel betrayed/etc in his advice if this behavior isn't kept under control. I don't exby realthor - CoreXY Machines
QuoteVDX ... I've powered my first heated bed simply with a bare 12VAC@8A transformator (which gives roughly 16 to 14 Volts AC depending on load) and switched the current with an AC-SSR. This can be done with any available transformator (found several from 5VAC@60A to 14000VAC@1mA in my scrapery), but for heated beds I'll avoid output powers above 50 Volts and currents greater than 20 Amps for sby realthor - CoreXY Machines
AM vazut ca nu merge cu reprapperi din Timisoara...piatza e tanara pentru asa ceva in ro. Ok, incerc altceva... as vrea sa aflu de la voi surse bune de cumparat: 1) stepper motors (nu cunosc pe cineva cu dezasamblari si in afara de olx nu am reusit sa aflu altceva, iar de pe olx nu prea am incredere) 2) bare liniare (8 si 10mm) 3) rulmenti pt barele liniare Daca le-ati luat din alta parte (germby realthor - Piața din centru
well, it's my thread ... and we are talking about what PSU to be able to give all that power to the motors considering all the above: heated bed, hotend(s) heater(s), etc. Ok, related to motors, I am talking about the Z here and I wouldn't want to let some printed gears to take care of the Z resolution. For extruder I get it, it's easy to retrofit a direct drive with a 3d printed part. For Z idby realthor - CoreXY Machines
I was only planning to use 1.2A for XY stage. I plan for Z to have 1.8+A and for the extruder I never gave it enough thought by now but direct drive with MK7 worked for so many... although I think I got some MK8s even if I ordered MK7 on aliexpress. But I still have those abroad, at my previous location. It's not difficult to print a herringbone-geared ensemble if it doesn't perform well enough.by realthor - CoreXY Machines
Quotedc42 Quoterealthor Quotedc42 Quoterealthor Anyway I will want to eventually have dual hotend, heated bed, 32bit controller (possibly Duet 0.85 even if not open source it's the one I would buy under 60Eur/$). The Duet 0.8.5 IS open source (CERN OHW license). But you won't find it for 60Eur/$ because it's made in the UK, not China, to good quality standards, and completed Duets are tested proby realthor - CoreXY Machines
Quotedc42 Quoterealthor Anyway I will want to eventually have dual hotend, heated bed, 32bit controller (possibly Duet 0.85 even if not open source it's the one I would buy under 60Eur/$). The Duet 0.8.5 IS open source (CERN OHW license). But you won't find it for 60Eur/$ because it's made in the UK, not China, to good quality standards, and completed Duets are tested properly before they are shby realthor - CoreXY Machines
For XY I plan on using 16 tooth GT2 pulleys. For Z I was planning the same before I get some good no-backlash gearing and I was not very concerned (smartrapcore alu still uses this solution so it's doable -yes, it'll go bang on a power-cut but there are solutions out there) For extruder I plan bowden as you observed and i will not use 1.2A but was planning to use a bigger motor as I wanted to goby realthor - CoreXY Machines
@dc42: 1.8deg motors, gt2, 16teeth pulley => 1 full step =0.16mm ...2 full steps would be 0.3mm error (0.15mm for 0.9deg motors) ... what does this mean for X and Y? On the other hand, if the Z probe could be made to test all 3 axes having endstops is pointless be they of any kind or any method. Unless you want redundancy like the industrial machines have. @os3dp: valid point, I have no expeby realthor - CoreXY Machines
I am barely decided on the mechanical aspect of my printer, electronics is quite in the air. I have more questions than answers... Initial plan (for a couple of months) would be ramps/arduino so I can blow it up without breaking the bank, no heated bed, ATX power supply, DRV8825 drivers, 0.9deg motors (no gearing), mechanical switches, what else ... In the meantime I want a proper 32bit contrby realthor - CoreXY Machines