Instead of 2040 you could use two 2020 at an angle of 60 deg. and with some kind of support brackets to install the linear rails. As shown here Not sure it is actually attractive if you are not printing the part. Very difficult part to machine.by LarsK - Delta Machines
I'm good - Pictures are fine. I believe that most of the cabling will work directly with any off-the-shelve board. The few that wont (endstop in particular) you can in 5 min make a small adapter to make them work... If it was me, I would put the board on the shelve and just focus on start printing with a different board. It should be very quick - But you will give up a lot of features. I once sby LarsK - Delta Machines
Maybe you can take some photos of the wiring harness and the board and the hotend wiring? Just to get an idea of what we are talking about. I am thinking, if you are not going to use their firmware with things such as fancy LCD and force sensors, then just throwing out the controller and bringing your own may be easier? You are going to be tired of 8 bit electronics on a Delta anyways. If youby LarsK - Delta Machines
Hey, Inspired from your post in Dentist thread - Can you post some more details about your belt paths? I am not sure I entirely understand how you are running them around.by LarsK - CoreXY Machines
Quotepatrickrio I was also concerned with belt length and also bowden tube length. I therefore really concentrated on keeping my movements tight to the printbed, and the carriage small. Every mm you can shave from either X or Y axis length means 4mm less belts used. You could mount the bowden tube vertically above the printer bed center to shorten the bowden tube for a large printer. That is soby LarsK - CoreXY Machines
Congrats on the Overlord, I was actually looking for it on kickstarter the other day (but didn't remember the name) to see what became of it. Can't believe you got one for just 330€ , amazing price, I just read a little about the reactions from the users, looks like it requires a bit of tweaking especially for ABS printing - But for 330 and then you have it - Great, good for you! - Enjoy.by LarsK - CoreXY Machines
Hey, truly amazing printer you have made. Really looks awesome and a lot of solid innovation, love the 2 print head. No printer for me but I joined your Backers Circle - Good luck!by LarsK - Crowdfunding Projects Announcements
Quoterealthor (SNIP) If you do the math you find out that the risk is very small. Most users disable enstops after homing anyways. I wonder if this is something to be really concerned about in a big way. I don't think you are correct that most users disable endstops after homing. It is often mentioned in these forums as a troubleshooting step - But that is what it is, troubleshooting. If you haby LarsK - CoreXY Machines
Quoterealthor QuoteLarsK about ESP8266 see this, it is truly great work! I see there that only RepRapFirmware supported boards (Duet,?) can make use of it. What's the point because Duet already has a web interface. I don't really get it. Can this be used with SBASE? Will we be able to use it for Arduino Mega and the likes? That is the plan? ESP8266 is supported in newest Repetier. I have not teby LarsK - CoreXY Machines
about ESP8266 see this, it is truly great work! On subject; Why don't you just start out with a RAMPS and the boring 8bit? A lot of people (me included) is still running this antique way and it is fine. Once you get a better feel for where you wanna go and how much money you want to sink into this, you can upgrade. Yes, in the future you may end up having an unused RAMPS and Arduino Mega - Aby LarsK - CoreXY Machines
QuoteJ-Max Hi guys, ... May I suggest you consider HTD GT3 belts ? ++JM Hey, why would GT3 be better? Less stretch?by LarsK - CoreXY Machines
Quotegrat Delta's scale poorly, even more so when you're talking 1m Z axis-- My delta is 720mm tall, and has a build height of 280mm. dc42's delta is 300mm diameter, 480-540mm print height, and is 1m tall. Best case, you're looking at 1.5-2.0 meter tall printer, and you're going to have to make the frame out of 2060 or something similar to get it to work. Even then, the bowden length would beby LarsK - CoreXY Machines
Hey, How come you are not looking at a Delta? It seems to me that it is the perfect solution for the geometry you want (300x300 x1000)by LarsK - CoreXY Machines
Quoterealthor I haven't sketched the actual extruder but I'm planning to use a direct drive extruder like this one. I use the same. On my first Chinese kit printer the bearing holding piece broke and I made my own which is reinforced - That one was injection molded. On my 2nd printer I printed my own and that worked and works fine to this day. On my 3rd printer I had the problem that the threadby LarsK - CoreXY Machines
Where is the motor and the part driving the filament? I know the smartrap-core is direct driven but I can't find the actual extruder in what you show above. Also earlier you showed two hotends in what seemed like a Bowden setup. Kind reminder: The hot-end is the part that gets hot (the one you showed a screenshot of above) and the extruder is the parts with the motor with a hubbed bolt whichby LarsK - CoreXY Machines
Quoterealthor Ok, now there is enough material here to send me to court . Bring it on Hah, well, for my part I'm afraid I have to disappoint. I don't feel I have more constructive input. As you know the Z axis still needs some work and you need to settle on an extruder and how to place the endstops.by LarsK - CoreXY Machines
Quoterealthor QuoteLarsK 1) Your printer is too big for just 8mm linear rods. the calculated linear rods are X=340mm, Y=360mm, Z=370mm. Are you saying that I should have 10mm linear rods for X and Y and maybe 12 for Z (considering that I am planning to have only one shaft per side)? Note: I could barely fit the 10mm Z linear shafts in the corners of the design, I couldn't fit the 12mm because tby LarsK - CoreXY Machines
A number of comments: 1) Your printer is too big for just 8mm linear rods. 2) 5mm material thickness is fine. No need to make that bigger. But material thickness is not all. An unsupported angle even in 5mm thickness will not have much strength. But at this point I think it is better if you make some test prints and try to feel it instead of listening to me trying to be smart based on pictureby LarsK - CoreXY Machines
Being an expat in Brazil it is difficult to get those kind of filaments in to the country It is only really practical to order it to friend or family in EU and then bring it when traveling. Parcels customs takes months and tax+fees are substantial. Even they might think that the filament is for commercial purpose and hold it back entirely. The specifications looks very nice though. Definiteby LarsK - CoreXY Machines
Hey, looks nice. Good job. I would maybe be a little worried about part stiffness. For example the vertical brazing from the wood plate to the steel structure and many of the carriage parts. Printed they might not be as strong as you hope for. Maybe reinforce and increase material thickness and surface contact area. It is my experience that with printed parts it is better to have a series of sby LarsK - CoreXY Machines
Quoterealthor QuoteLarsK Quoterealthor Maybe we could use both belt and spectra for what they are good at. Belt for motion transmission from the motor and spectra for easy routing through a system of pulleys. @LarsK: Could your design be multiplied laterally (with spectra that is) so that the achieved reduction could be much higher? Technologically we (as in mankind - general industry) abandoneby LarsK - CoreXY Machines
I am concerned that play in the carriage bearings will allow your nozzle to move and thus you will not give very nice walls. The bigger the distance from the linear bearing to the nozzle end, the bigger will the resulting movement from play in the linear bearing be. At the same time it seems you will only install one linear bearing so the play can be significant unless you buy very high endby LarsK - CoreXY Machines
That Z axis - It looks like you are only using a single linear bearing on each side to support it? (did not open the CAD model)by LarsK - CoreXY Machines
Quoterealthor Maybe we could use both belt and spectra for what they are good at. Belt for motion transmission from the motor and spectra for easy routing through a system of pulleys. @LarsK: Could your design be multiplied laterally (with spectra that is) so that the achieved reduction could be much higher? Technologically we (as in mankind - general industry) abandoned this kind of gearing maby LarsK - CoreXY Machines
Quoterealthor It should be pretty easy to add a second pulley on the motor side of the belt-Z design. I can see two improvements right away: 1) the double pulley will provide 2:1 reduction; 2) both pulleys can be 32 or 64 teeth pulleys and the motor one can be 16 teeth this will provide either another 2:1 or a 4:1 on top of the 2:1 provided by the compound pulley. Hence a 4:1 or 8:1 reduction. Tby LarsK - CoreXY Machines
QuoteEdvardas Geared steppers are supposed to have backlash, no? Although sli3der 3d printer use geared stepper with a great results. Only a problem if you move the bed up and down doing print. If you just go down ( one direction) the backlash should be irellevant.by LarsK - CoreXY Machines
QuotefilipeCampos ... Modify the setup to have a good reduction and then it will be a great system. Using a geared stepper will give you all those things. Will hold when powered off, very high reduction and low power use - Still very reasonable costs. 2:1 using belts is the limit I think. If you want 4:1 or more then you need to apply real gears... Thus geared stepper.by LarsK - CoreXY Machines
QuoteEdvardas ... Here is some information on the correct mounting techniques for leadscrews You can mount a single leadscrew according to A technique but to be able to use two screws driven off a single motor one would need use technique B. For this one would need a high quality perfectly straight lead screw otherwise screw would transmit any irreguliarities to the bed and to the print itself.by LarsK - CoreXY Machines
QuoteEdvardas QuoteJ-Max ... I think that 4:1 reduction via pulleys would be complicated to achieve. Better do 2:1 belt reduction (40T and 20T pulleys) and use 400 steps per revolution stepper motor. That would be more compact and easier to source parts. The math: 40T pulley with GT2 belts: 40x2 = 80 mm That means that if the motor turns this pulley 360 degree then the belt will move 8by LarsK - CoreXY Machines
Quoterealthor ... The original smartrap has a different size (larger) upper pulley that acts as a reduction as I read somewhere. Can't that solution be applied for AndreasL's solution as well? ... Maybe we agree, but for clarification: - The smaller the driving pulley is (the one that the motor drives on) - The better resolution. This is because the smaller the pulley, the less distance the bby LarsK - CoreXY Machines