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3D Printer support

anej

Hello.

So i am planning on making a 3D printer. I know that i can buy a kit and all that but i really want to build my own.

Here are some of the parts i would use:

- Extruder head: http://www.ebay.com/itm/Geeetech-MK8-extruder-J-head-Print-ABS-PLA-for-3D-Printer-Reprap-Mendel-/390993481130?pt=LH_DefaultDomain_15&var=&hash=item5b09070daa

- 4X Stepper motor (one for X, one for Y and two for Z): http://www.ebay.com/itm/1pcs-Nema17-Stepper-Motors-2-Phase-Motor-for-3D-Printer-Prusa-Mendel-Makerbot-/191081254280?pt=LH_DefaultDomain_0&hash=item2c7d548d88

- Heated bed: http://www.ebay.com/itm/1-RepRap-3D-Printer-PCB-Heatbed-MK2a-Heat-Bed-for-Prusa-Mendel-/171275126930?pt=LH_DefaultDomain_0&hash=item27e0cb0892

- Controller: http://www.ebay.com/itm/Mega2560-R3-RAMPS-1-4-REPRAP-3D-Printer-CONTROLLER-A4988-Stepper-Motor-Driver-/131057008442?pt=LH_DefaultDomain_0&hash=item1e839b3f3a

Ok. So now I don't know if that arduino + ramps is everything i need. Does arduino connect to the computer and the data is transfered through arduino or ?

Are there any additional parts that i would need ?

Here is the design of how i am planing making it (not quite finnished yet but you get the idea...): http://prntscr.com/68ep96

EDIT: Shoud i use a display too ?

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  • One though. Using screws for the Y and Z axis will have a much higher resolution than the X axis which is belt driven. While the screw also increases the lifting ability of the Z axis, you dont gain much in the Y axis over using another belt or you could use a screw to match the resolution of the X to the Y.

  • in reply to sgtsabot

    So should I use threaded rods on X,Y and Z ? Doesent that slow down the whole print or will it be OK ?

    EDIT: Could I use gears to increase the resolution?

  • in reply to anej

    I don't know what Mark Huey was talking about. There is no reason why changing a belt to a threaded rod in one axis (Y) and not the other (X) would make any sense. I took it as some sort of miscommunication and was just going to not reply.

     

    Threaded rods will definitely slow the printer. This would be the equivalent to using a CNC machine as a 3d printer.

     

    Yes, you can use gears. This will also slow the motors. There are so many steps per revolution depending on the motor you use. The more steps per inch the higher the resolution. But your motors can only spin so fast. In other words, slower movements. You will also need to make everything tight fitting. Any "slop" between gears and that takes away the added resolution you are going for.

  • in reply to kingrahl

    Ok. So i will stay with the belt on X and Y and on Z i will use rod - the Z doesen't need to move fast right?

    So those stepper motors i will buy it says "Step Angle: 1.8 degree+-5%" - is that the "resolution" of the motor and is that ok?

  • in reply to anej

    You probably won't get a full turn of the screw on the z-axis for each layer. It doesn't need to move fast.

     

    1.8 degrees is pretty much the standard to use. The resolution is a factor of the gearing system. Resolution measurements is accomplished by calculating how many steps (or 1.8 degrees out of 360) your motor takes causing the circumference of your pulley to move your belt a linear length of 100mm. This is all a part of calibrating your printer when you program your controller board.

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  • in reply to anej

    You probably won't get a full turn of the screw on the z-axis for each layer. It doesn't need to move fast.

     

    1.8 degrees is pretty much the standard to use. The resolution is a factor of the gearing system. Resolution measurements is accomplished by calculating how many steps (or 1.8 degrees out of 360) your motor takes causing the circumference of your pulley to move your belt a linear length of 100mm. This is all a part of calibrating your printer when you program your controller board.

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