Hello all, I have been thinking about several laser diodes. I am working from the Nichia NDB7875-E with a 4.01 focus convex-flat lens. Lens diameter is 6.33mm. It looked really simple when I started but I can't figure it out. I modelled it in SW to have a look. So I start with two lasers: This is OK. You can see the lens support are just touching each other. In this setup I respect thatby LarsK - Laser Cutter Working Group
Hello JAC. I am not at home so I can't give some really good pictures. I also wanted to make an instruction but I realised that 75% of all the instructions are in this PDF document: The only differences are: 1) You need to superglue the magnets to the various bases. Be careful with the magnets. They are very fragile. 2) You need to glue the threaded rod to the carbon rod 3) You need to uby LarsK - Delta Machines
QuoteJ.A.C. Thanks LarsK, we are taking about THIS Printer right? Have to understand that: when I get it running, if I like the machine, I plan on changing parts, if I do not like 3D printing, I will have wasted 400$ and move on with my life. If I do Like it, by end of this summer, the machine will be totally changed (except maybe the frame lol ). But I do want to start with a Delta, I know I amby LarsK - Delta Machines
QuoteZavashier Well, The situation is different, but you suppose the structure is stiff enough for the linear rails. Everything matters. We're both professionnals, I'm sure we will agree whatever. For the Prusa I3, you calculate with a static load. Redo your calculations with a dynamic load, the values will change. A flex of 0.1mm is the layer height, it should just clogg up the nozzle ! Hopefullby LarsK - CoreXY Machines
QuoteJ.A.C. Well, Got my this: My first printer It will get me started, I will evolve from there =D Mow to act indifferent, as if I was not caring when it get's here ... but every time i get home from work, I will carry hope for it to have arrived ... then be a little sad for it not to be there yet! I will keep up to date on it ^_^ I have the same. Some comments: 1) For ABS you need a heaby LarsK - Delta Machines
QuoteZavashier Well, a proper set of pulleys and idlers with few extra bearings will cost you about 1% of the overall cost of the machine. As alignment is very important on any machine, and especialy on a CoreXY, maybe you don't wana save on that fiew. QuoteLarsKI just wanted to say that I don't think calculating the loads makes much sense on a coreXY design. I'm surprised. Mecanics and structurby LarsK - CoreXY Machines
I just wanted to say that I don't think calculating the loads makes much sense on a coreXY design. I am sure that you will end up finding that if your design has no moments or torques in operational load scenario, then you can use the smallest of the smallest. I do not know the system you are asking about, but in general it is more about choosing something that is practical and works with the rby LarsK - CoreXY Machines
Hello, Is it correct that you have tried this with two completely different boards? So that the only common electronic parts for the two are the motors, extruder, hotend and endstops? Is it correct that you have tried with Ramps and both running that with Marlin and Repetier? Is it correct that the G-code that Cura outputs for you, you have tried in your working printer and it prints correct, wby LarsK - CoreXY Machines
Try to run the following G code: G28 G1 x0 y0 z10 f3000 G1 x100 F3000 G1 x0 F3000 G1 x100 F3000 G1 x0 f3000 G1 x100 F3000 G1 x0 f3000 G1 x100 F3000 G1 x0 f3000 G1 x100 F3000 G1 x0 f3000 G1 x100 F3000 G1 x0 f3000 G1 x100 F3000 G1 x0 f3000 G1 x100 F3000 G1 x0 f3000 G1 x100 F3000 G1 x0 f3000 This should move from x0 to x100 and back a couple of times using both motors to make the move. Does it acby LarsK - CoreXY Machines
QuoteAndrewBCN Unfortunately your math is wrong... think about it for a moment... QuoteLarsK Also review the equations of motions as originally written by Moyer: Include an error factor in these equations and you'll notice that any error in A or B will cause an error of half magnitude in both X and Y i.e. the total error remains exactly the same, it is not halved as you incorrectly concludedby LarsK - CoreXY Machines
QuoteJ.A.C. ... Now, the bed what drove me nuts at first, the concept is actually based from platform elevator system. .... Hello J.A.C That z level is very alternative. Try to consider how that will make it's movement in negative z direction (down) - You will be relying on gravity to position your bed when going down. 3d printers needs to be very exact and with nothing forcing it you can eby LarsK - CoreXY Machines
QuoteAndrewBCN QuoteLarsK ... Extruder mechanism: I think that on the CoreXY it really does not matter that much. If you position the motor on the carriage or use Bowden. But use direct extruder for simplicity. Again - Much easier just to buy that bigger Nema... ... Well, it matters, because you want to minimize the mass of the moving head, to achieve the maximum potential speed of the CoreXYby LarsK - CoreXY Machines
Quotesdavi QuoteLarsK Some designs have the tensioning where the belts terminate, again from Sdavi - I don't agree with him here. You should only need one tensioning point for each belt. Actually, I only use one tensioning point for each belt, the motors are both now fixed. A previous iteration I did tension only by sliding the motor mounts, but found this to be a less accurate way to apply tenby LarsK - CoreXY Machines
Hello J.A.C I am currently also finishing up my first design for a CoreXY. It is 99% sketched and currently printing parts and waiting for some last things to arrive. I already have a Delta style. I would like to offer you and anyone else reading the following inputs/opinions: 1) First thing you need to decide is if the support structure and linear movement parts will be together (the same) orby LarsK - CoreXY Machines
Hello Tpra Sorry for the late response. Eventually I have gone with my own design. I have done so for the simple reason that my "working" Delta printer is not so much working for these parts. I simply can't get it to print such solids parts as you are using. Warping and loosing contact with the bed all the time. Maybe because I am using ABS. So I am going to go with a design that I have moreby LarsK - CoreXY Machines
Hello, This is really a nice build. Will you upload the CAD files (either as SW or IGES) for the machine? I am about to build one myself and I would like to use your way of holding the nozzle. It is very elegant. How did your Z plane work out? PS. The parts your friend made for you also looks really great (!). Don't be too disappointed if you cant make something like that right away.by LarsK - CoreXY Machines