@KeesL: voor XY heb ik LM8UU gebruiklt voor de Z-as heb ik LM12UU gebruikt. De keuze voor de loop van de riemen is heel bewust. Beide riemen komen in het midden van de carriage uit. Bovendien zitten alle assen voor X en Y in een vlak. De ene riem zit net iets boven dit vlak de andere net iets er onder. De riemen kunnen elkaar dus niet raken, er is dus geen extra slijtage, De tekening die je lietby jand - Projecten
@p4tje: klopt, het is ook de bedoeling om er een bowden setup van te maken. Dat is dan ook de volgende stap. Ik wilde in ieder geval iets hebben dat stevig genoeg is om complete extruder mee te zeulen. En de extruder die er nu op zit is zo lekker vertrouwd. Waar zie je backlash? Weet je zeker dat je geen ringing bedoeld? (de hobbeldebobbeltjes na een gat in een vertikale wand)by jand - Projecten
Wat is het probleem met het kruisen van de riemen? Bij een standaard core-xy systeem lopen de riemen ook op verschillende hoogtes.by jand - Projecten
Ik heb zelf ook een printer gemaakt met het core-xy systeem. Ik ben hier erg tevreden over. Zie de thread in het engelstalige deel van het forum: Het is best wel een lange thread. Hier staan wat foto's: en wat printvoorbeelden: en drie video's: Misschien heb je er wat aan.by jand - Projecten
@pando855: No problem. And you are right in the BOM i wrote that in a future version I might use a TR10 leadscrew. But at the moment it is working fine, so I am not in a hurry to do that.by jand - CoreXY Machines
I think you are right Reinhold, it does not make sense to increase the size of the threaded rod. A lot of work to redesign the z-axis parts and for what reson? Redesigning for M6 whould easier. Why do you want to change the size of the threaded rod pando855?by jand - CoreXY Machines
Het beste om te kerkennen is ruiken tijdens het printen. Als het stinkt is het waarschijnlijk ABS, als het wel lekker ruikt is het waarschijnlijk PLA. Als je wat extrudeerd in de lucht en je laat daarna de printkop 'leeglopen' zie je ook een verschil. PLA loop wat sneller leeg, is wat voeibaarder, ABS wat taaier. Maar dit is natuurlijk wat algemeen. Hoe groot is je printje?by jand - Extruder, Hotend en Filament
@Maarten, weet je zeker dat het ABS is? Met 180 graden kun je geen ABS printen. Als je printje te klein is gaat het ook niet lukken. Het ABS moet wel de kans krijgen om tussen de lagen door wat af te koelen. bijvoorbeeld een 10x10mm cubus gaat (bijna) niet lukken.by jand - Extruder, Hotend en Filament
I am glad you found it. Sometimes the solution is really simple. So you can continue where left. RTS in good old assembly. (Return from subroutine)by jand - CoreXY Machines
@zelogik: I zipped the complete Marlin folder I used for my printer and placed it in my Public share So if you want you can give it a try.by jand - CoreXY Machines
@zelogik Sorry I misunderstood you. Infill does not rotate. You were rightby jand - CoreXY Machines
@zelogik: Cura does rotate, just select the object with the left mouse button and three icon will appear in the bottom left. The first one is rotate.by jand - CoreXY Machines
QuoteReinhold ... IMHO all of the above doesn't really/nearly "explain" anything zelogik sees (with his motors "1 infill line missing" (out of "3") should be quite a few steps ... much more than 4 (quadstep) too ) hope I didn't bore y'all - got 2 run Regards Reinhold I don't think Zelogiks printer is missing infill lines, but it is shifted. So the middle line is closer to the first than to tby jand - CoreXY Machines
I was thinking, what happens if you rotate the part by 45 degrees and then print in the normal configuration? If you have some interaction between X and Y it might give the same result as the sqrt(2) method. If you want I can ZIP my marlin firmware and send it to you. Let me think about your optionsby jand - CoreXY Machines
Like I promised an example from my printer. I am running Marlin. Not sure which version, but the files are from April 13 2014. File was sliced with Cura: 0.2 mm layerheight an 50% infill. More images here: BTW: the red carriage is printed with 100 mm/s. See Edit: It took a little longer than expected, because my new phone arrived yesterday and I just had to play with it. Pictures were takeby jand - CoreXY Machines
I did a test print. It has a regular infill pattern, but I am having a hard time to take a reasonable picture. Wil try again tomorrow with daylight.by jand - CoreXY Machines
@zelogik I did not see this behavior on my printer. In your first picture this is the infill we are looking at, right? If I see it correctly you get two infill lines next to each other and then a gap of one infill line. If you want I can print the same object to compare. I have a RAMPS 1.2 board and marlin firmware.by jand - CoreXY Machines
@genelmx: First you do not gain any buildspace by removing the idlers. You do however reduce the amount of plastic and it will probably be easier to print in ABS. But you have to do the tensioning somewhere else. When you do it on th carriage you will probably loose buildspace in X direction. You have to carefully check the belt path so that motor pulley and the bearings line up correctly I knowby jand - CoreXY Machines
QuoteOhmarinus QuoteCharlieSteurbaut .... Het plakte bij mij wel minder goed aan het printbed, ten opzichte van Repraper filament! Leuke hobby hebben we toch. Het kleven aan het bed is bij mij precies andersom. Repraper minder goed dan siridi. (1.75 mm ABS) Ik heb van jonnie toen wat test meters gehad en was zeer te spreken over de kwaliteit.by jand - Commerciele aanbiedingen
Hi Marinus, I also started with a tantillus design, but stoped after a few tests. You can only move it when the tension on the wires is good and equal on both sides. The axis rotate so you have to use bushings which either bind or are sloppy in my opinion. In all i found it too fiddly. I did build a core-xy system and am very happy with it.by jand - General
Bearings are 624zz, so with 4mm inner diameter. All lower bearings have to be Flanged bearings, for the top bearings you can use normal bearings, but it is probably better to use flanged bearings for both top and bottom.by jand - CoreXY Machines
Maybe you are interested in a printer based on core-xy. Zelogik made a very nice printer, but it is made from CNCed aluminium. You can find it in this thread: I redesigned it to use printed parts, see same thread. My variant, which I called RepRap-XY, is more or less finished. I build it and it works fine. I still have to work on the documentation. You can find the files here: To see it in actby jand - General
@fleming Yes That is the latest version. For the screws, washers and nuts, This is what I counted manually (see BOM in doc folder) M3 nuts 40 M3 washers 90 M3x12 4 M3x30 40 M3x40 6 M4 nuts 28 M4 washers 116 M4x12 6 M4x16 2 M4x30 4 M4x40 51 I use a washer at both sides. So one at the head and one at the nut. The screws I use are DIN 7985 (see ) They are far cheaper than Allen screws. But alby jand - CoreXY Machines
@fleming OK, makes sense. No it is not for anti backlash. We don't need that on a reprap, because Z in only one way during printing. I use two nuts to even out the iregularities in the rod. But more important: A threaded rod is never straight, so at the nut it will make a circular movement. and the system might bind. The nut can move freely in X and in Y directions. When I am finished with thby jand - CoreXY Machines
@reihold You don't have to convince me about the "tank" (maybe Fleming) And no I don't get you wrong. It was actually intendend that way, so I take it as a compilent. Maybe it is overkill, I don't know. What do you mean by "foudroyante", Google translate was not very helpfull. The 150 mm/s vid will have to wait until after the BOMby jand - CoreXY Machines
@fleming Great, I am excited! But do take a look at the Z-axis, Especially the way the M8 nut is working. It has a buildin wobble compensator. The Z-axis is actually quite stable, but I can understand your concerns. OK time to go to bed now.by jand - CoreXY Machines
@fleming I hope I do not have to make any changes anymore. BUT I will work on the BOM now and update the model when necessary.by jand - CoreXY Machines
I started working on the BOM this evening. Please check the github. There is a start of the BOM. in the doc folder. @fleming Please update from github. I made a few small changes today. In your BOM there is still a spacer-1, which is the same as spacer-9mm4. In the model I did not put any screws and nuts. Just a few washers around the bearings.by jand - CoreXY Machines
The motor I used is this one: I think it is important to choose motors the use 1.7 A instead of moters that use 2.5 A. Usually these motors have the same torque. For repraps you do not need all of the 0.4 Nm torque. If you run the motors at only 80% of the current they do not get hot. You can run these motors with just a little over 1 A. When you use a 2.5 A motor and run this at about 80% yby jand - CoreXY Machines
QuoteReinhold Hi Jan Would you mind explaining/confirming some details of your heated table? (it seems reality is "at least in part" unlike drawing ) You are correct. In my model the sandwich of the printbed is on top of the extrusions. In real hardware the extrusions are in between the two alu plates. 0) Table size x mm x y mm (220x220) ? The table size is 220 x 200 mm. I ordered the aluby jand - CoreXY Machines