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OneZ i3

Discussion in '3D printers' started by Keith Davis, Apr 17, 2016.

OneZ i3

OneZ i3

Discussion in '3D printers' started by Keith Davis, Apr 17, 2016.

A quiet, 8inx8in build area, Cartesian printer with permanently level bed. This is a compact, solid, inexpensive printer that will reliably print any type filament for thousands of hours while you sleep, fish, or play ball in the park.

OneZ i3 level bed accurate layers robotic wheels
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  1. Keith Davis

    Keith Davis Veteran
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    Thanks, I'll be giving them a try
     
    #181 Keith Davis, Dec 4, 2017
  2. Marco B

    Marco B New
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    Merry Christmas to everyone!

    Today I thought I could finally build up my printer, but I had to find out, that there are several screws are missing in my workshop. So I build up a list of all screws.
    First I've count the per Page used on this whole-in-one assembly instruction: http://3dwrx.com/openbuilds/i3/OneZ-i3_OpenBuilds.pdf

    After this I have sum them up.
    So the first page contains the total an the following are per page
    Screws Onez i3.pdf

    So I think this would be very useful for everyone.
    Cause I will build my printer with other stepper drivers, PSU and with Arduino and RAMPS-Shield, I did not count the screws of this pages.
    @Keith Davis :
    You're welcome to use this pdf for your published BOM and assembly instructions.

    Cheers,
    Marco
     

    Attached Files:

    #182 Marco B, Dec 25, 2017
  3. Marco B

    Marco B New
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    I finished my build.
    Now its time for tweaking the software:
    DSC_20180107_185612_529.JPG IMG-20180118-WA0001.jpeg signal-2018-01-23-215431.jpeg signal-2018-01-23-223340.jpeg

    The calibration cube was printed with a initial layerheight of 0.3 and the rest with 0.4mm

    Im interested, what print and travelspeeds and accelerations you guys are using
     
    #183 Marco B, Jan 24, 2018
  4. Keith Davis

    Keith Davis Veteran
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    Something that size I print w/50mm/sec infill, 30 perimeters, 100 travel @ .2 layer

    I use 100/mm/sec infill, 70 perimeters, 100 travel @ .2 layer to print all the pieces of a OneZ and fill up the bed with as many pieces as will fit. I generally run .4 for first layer.

    No slicer settings for acceleration. Marlin:
    #define DEFAULT_MAX_FEEDRATE
    #define DEFAULT_MAX_ACCELERATION {1000,1000,5,1000}
    #define DEFAULT_ACCELERATION 500
    #define DEFAULT_RETRACT_ACCELERATION 500
    #define DEFAULT_TRAVEL_ACCELERATION 3000

    Set X & Y motors to remain enabled when not in use
    // Disables axis when it's not being used.
    #define DISABLE_X false
    #define DISABLE_Y false
     
    #184 Keith Davis, Jan 24, 2018
  5. JustinTime

    JustinTime Veteran
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    You are using 70 perimeters? Isn't that A LOT? The default in Slic3r is 3! Any reason you chose this high number?
     
    #185 JustinTime, Jan 25, 2018
  6. Keith Davis

    Keith Davis Veteran
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    70 mm/sec on perimeters. Just 3 perimeters.
     
    #186 Keith Davis, Jan 25, 2018
  7. Marco B

    Marco B New
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    Im still having problems with the prints an now I think, I figured out, whats wrong:
    my Z Axis won't move correct below 0.5mm per command. Thats the Point why every print with a layer height under 0.4mm looks squeezed.
    If I issued the Command "G1 Z10" after homing the Axis moves exactly the 10mm so its not a problem with the Steps per mm.

    Is my stepper not strong enough?
    These are my stepper motors
    Nema 17 Bipolar 59Ncm (84oz.in) 2A 42x48mm 4 Wires w/ 1m Cable & Connector
    and these are my stepper drivers:
    Digital Stepper Driver 1.0-4.2A 20-50VDC for Nema 17, 23, 24 Stepper Motor

    I set the current to 2.03A RMS and reduced the microsteps to 4

    The z Axis is in level and moves very softly without the TR8 Rods;
    Any suggestions?
     
    #187 Marco B, Feb 3, 2018
  8. Keith Davis

    Keith Davis Veteran
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    Exactly which TR8 screws are you using? It sounds like your screw's lead is not divisible by .01. What are your pulleys? Both the one on the Z motor and the Z screws.
     
    #188 Keith Davis, Feb 3, 2018
  9. Marco B

    Marco B New
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    Im using the openbuilds tr8x8 so my lead is 8mm.
    My pulleys are 20teeths on the rods and 16teeths on the motor.
     
    #189 Marco B, Feb 4, 2018
  10. Keith Davis

    Keith Davis Veteran
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    Your pitch is 2mm per revolution with those screws. Change the motor pulley to a 20 tooth pulley as you do not need reduction (keep screw pulleys at 20T). That will give you even 0.01mm per step. You were getting 0.008mm per step with the reduction. I'd also increase to 1/8 microstep.
     
    #190 Keith Davis, Feb 4, 2018
  11. Marco B

    Marco B New
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    Im a bit confused, because i followed your advice and build it with 16:20;
    Also I think there is a typo in the prusa-calculator, because its written pitch but should be lead.
    Otherwise the "G1 Z10" command would not be executed correct.
     
    #191 Marco B, Feb 5, 2018
  12. Keith Davis

    Keith Davis Veteran
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    The advice to use 16:20 is for a M8 threaded rod. M8 threaded rods have a 1.25 pitch. A 16:20 reduction changes the threaded Z screw pitch to 1mm per revolution.

    You used Acme lead screws instead, which have a 2mm per revolution pitch. Therefore you do not need a gear reduction.

    The Prusa calculator does indeed incorrectly misuse the terms "pitch" and "lead". That is because threaded rods only have 1 start and hence pitch and lead are the same thing. Notice that the calculator does not have any presets for using Acme leadscrews (which have multiple starts so lead and pitch are not the same) because Acme screws do not contribute any value to the Z axis on a printer over using threaded rods.
     
    #192 Keith Davis, Feb 5, 2018
    Kyo and GrayUK like this.
  13. JustinTime

    JustinTime Veteran
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    As I've mentioned last year, I bought these. They are excellent quality. I bought the 2mm pitch ones. They are strait and gave me excellent results. I'm assembling my printer again and I'm sure they'll do a good job again.
     
    #193 JustinTime, Feb 5, 2018
  14. hpcre

    hpcre New
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    Hello.

    I'm trying to access the posted files for the build but i get an error that they are all unavailable. have the links changed ?
     
    #194 hpcre, Dec 26, 2019
  15. Keith Davis

    Keith Davis Veteran
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    The links at the bottom of OneZ i3 download for me this morning
     
    #195 Keith Davis, Dec 28, 2019
    hpcre likes this.
  16. Jason hsu

    Jason hsu New
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    hello everyone

    I'm trying to access the published build files, but none of them are downloadable. Is the link dead?
    Can someone please share the file?
    Thanks
     
    #196 Jason hsu, Jul 30, 2023
  17. Alex Chambers

    Alex Chambers Master
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    This is quite an old thread (2017), so it's not very suprising if some links no longer work. I did manage to access the build manual, but my anti-virus software didn't like the other links.

    Alex.
     
    #197 Alex Chambers, Jul 30, 2023
  18. JustinTime

    JustinTime Veteran
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    You can get the SKP zip file and get from SketchUp the .stl files. That file is OK, I checked it. Also the BOM link and the Assembly Instruction link are working fine.
     
    #198 JustinTime, Jul 30, 2023
    Peter Van Der Walt likes this.
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