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almal

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Posts posted by almal

    how slicing is calculating the speed and feed rate

    in UltiMaker Cura

    Posted

    gr5, you still think too limited... ;)

    It's actually a 6-axis-printer. With the right robot arm you can print in a arbitrary layer direction at a arbitrary position within a volume.

    Imagine, the initial 'print bed' could be something like a sphere holded by a very thin strut or similar. Then the robot arm with the nozzle at its end could print onto that sphere and create a print of e.g. the shape of the spherical head of a dandelion, i.e. something which is almost impossible today. Of course simplier prints could use simplier forms of 'print bed'. Maybe we will call it rather 'print seed' than 'print bed'.

    The really ugly part of such a development would certainly be the slicing algorithm for such forms. For the above mentioned print, slicing would happen in spherical shells instead of layers. From a mathematical point of view it doesn't matter. It's just a different object. I hope, Daid will survive if he reads the last two sentences... :O

    @almal: Sorry for hijacking your idea, but it is just too cool not to think about where this might lead... B)

     

    No problem you have exactly the same idea as me :)

    now I have to devlope the slicing not the easy part

     

     

    how slicing is calculating the speed and feed rate

    in UltiMaker Cura

    Posted

    The length of a print step, the nozzle size and the layer height give you the volume of the needed filament. With the standard RepRap flavour the E-component of a G1 command has to represent the length of filament used for extruding this volume. So you have to divide the volume by the cross-section of your filament.

    If you use the volumetric flavour (implemented in Cura as a alternative RepRap flavour since not so long ago and for a bit longer as UltiGCode for the UM2), the E-component of a G1 command directly represents the volume.

     

    the problem is I am not working with traditional layers. my layers could be 1 mm at one point and 2 mm at an other with a variation of extrusion between those two point. I searching for a new way of calcul without using some plug in. I am more looking for mathematical calcul the slicing software are using

    thanks every one for thoose information

     

    how slicing is calculating the speed and feed rate

    in UltiMaker Cura

    Posted

    You'll need a time component as well. I.e. the printer will execute the task in a given period of time. Hence the feeder needs to be able to deliver that volume of material in the same time or better.

    It's a subject that's been interesting me of late. Problems such as underextrusion are caused by a disparity in this timing (there may be underlying hardware issues that exaggerate the disparity). The normal way to deal with overly tight sync constraints is to have some kind of buffer between the supplying and consuming processes. Perhaps a reservoir of some sort which is kept topped up regardless of the current consumption rate. Of course a larger reservoir would make filament color changes a bigger deal.

     

    what I understand of the gcode is that he give an extrusion lenght , a speed and two point in the space and the goal of the machine is to extrude the lenght and to move from one point to the other with the speed define. So I think I am going to be able to synchronize the movement with the extrusion ? Am I wrong ?

     

    how slicing is calculating the speed and feed rate

    in UltiMaker Cura

    Posted

    Yes this is this type of information i am looking for

    I am also looking for the amount of material I need to extrude when I flatten some new material on a layer already extrude for exemple if i want to extrude 1 mm height or 0.5 mm height is this is going to change width of my extrusion.

    when you print a layer, the extrusion is flatten on the older layer. I don't really understand how to calculate the shape the extrusion is going to take when you flatten it on a new surface. It seems to be different than filament on top of other filament (the extrusion is not round but more some kind of oval)

     

    how slicing is calculating the speed and feed rate

    in UltiMaker Cura

    Posted

    hello

    I am an ultimaker 1 user and I am working on a new way of 3d printing on a robot arm support. I am looking for some information about the relation between the size of the noze the amount of plastic extrude, the speed , the retraction and the distance between the layer.

    how I can define some strategy to slice some model with different plane not just z axe.

    My biggest problem is to understand how much plastic I had to extrude to fill a specific amount.

    If you had any mathematical formula or test or files I can read to understand this I would be very happy

    thanks and sorry for my poor english

     

    Ultimaker power supply not working

    in UltiMaker 3D printers

    Posted

    hello

    I bring my ultimaker from France to England and the power supply is not working any-more.

    do you think that would be because of the adaptor from European to English socket ?

    when I connect the power supply to the socket no green light and went I connect it to the ultimaker a green light appear but the on off don't make the ultimaker work. my ultimaker can be connect with usb ( blue light from the extruder) but not working.

    If you have some answer ...

    thanks for reading

     

    double fan

    in Third party products & modifications

    Posted

    It is because I only have the connector selling wise the basic ultimaker, so I have to create a derivation to connect the two fan in the same plug. that is why i am wondering if i have to buy two fan witch need lees energies but I think that two fan of 12V 0,10 Am in derivation will plug white-out problem of energies ...

    Christmas present from Ultimaker: Cura 12.12 release

    in UltiMaker Cura

    Posted

    I thanks for this update

    but my cura is not longer working it crash evry time I open it ...

    do you have a solution ? someone else have this problem? can I Upload the last version which were working perfectly ?

    if it can help to understand

    (Process: Cura [567]

    Path: /Applications/Cura/Cura.app/Contents/MacOS/Cura

    Identifier: com.ultimaker.Cura

    Version: 12.12 (12.12)

    Code Type: X86-64 (Native)

    Parent Process: launchd [289]

    Date/Time: 2013-01-03 01:35:42.747 +0100

    OS Version: Mac OS X 10.6.8 (10K549)

    Report Version: 6

    Interval Since Last Report: 363371 sec

    Crashes Since Last Report: 9

    Per-App Interval Since Last Report: 89 sec

    Per-App Crashes Since Last Report: 9

    Anonymous UUID: ****

    Exception Type: EXC_BAD_ACCESS (SIGSEGV)

    Exception Codes: KERN_INVALID_ADDRESS at 0x0000000000000000

    Crashed Thread: 0 Dispatch queue: com.apple.main-thread)

    Stop extrusion

    in UltiMaker Cura

    Posted

    Hello,

    I have a probleme with the print of a complex model. My printer work well with simple model but with this one It start good but after some time y don't give enought material to continue printing. I don't know if I can resolve this problem by changing some preset when sliding to Gcode or I have to change somthing on the model or on the ultimaker. I show you some pincture to ilustrate after. sorry for my poor english. :oops:

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