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  1. #1
    Engineer clough42's Avatar
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    Itty Bitty Double Extruder

    Introducing the Itty Bitty Double Extruder:


    IBDE-RightFront.jpg
    This is a completely new dual extruder system:

    • Dual Hexagon hot ends on 20mm centers
    • Quiet, zero-backlash belt drive
    • NEMA 14 motors
    • Integrated hot end cooling
    • Integrated print cooling
    • Integrated servo Z-probe for auto-bed-leveling
    • Easy-to-install cam-lock idler bearing shafts
    • 2g lighter and 2mm narrower than the standard MakerFarm hinged single extruder
    • Includes all parts necessary to mount on MakerFarm Prusa i3v printers

    Please use this thread for questions and discussion.

    *** A hardware kit is now available! ***
    Get it here

    Links:

    Attached Images Attached Images
    Last edited by clough42; 04-20-2015 at 12:13 AM. Reason: Update summary information

  2. #2
    Engineer clough42's Avatar
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    There has been a fair amount of interest in a hardware kit, so I've been investigating pricing.

    What would you want in a hardware kit for the extruder?

    • Screws, bearings, pulleys, belts, springs and insulating tape (of course)
    • Hobbed bolts?
    • Hot ends?
    • Motors?
    • Z probe servo?

    If you have stock MakerFarm-shipped RAMPS electronics, you might also need

    • A4988 driver board
    • RRD Fan extender

    to control the extra motor and print cooling fan.

    Everything (except the RAMPS electronics) can be sourced from a combination of MrMetric, MakerFarm, Pololu, McMaster Carr, HobbyKing, Harbor Freight and a couple of Chinese eBay sellers for around $253, including shipping to the US (2-3 weeks). I'll upload a shopping list soon.

    I've been investigating volume pricing, and I could probably offer an all-inclusive kit (everything except the RAMPS electronics) shipped Priority Mail in the US for a little less (maybe $230, depending on sourcing).

    How much demand would there be for such a kit, or for a cheaper kit without the hot ends and motors?

  3. #3
    Technologist
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    Quote Originally Posted by clough42 View Post
    There has been a fair amount of interest in a hardware kit, so I've been investigating pricing.

    What would you want in a hardware kit for the extruder?

    • Screws, bearings, pulleys, belts, springs and insulating tape (of course)
    • Hobbed bolts?
    • Hot ends?
    • Motors?
    • Z probe servo?

    If you have stock MakerFarm-shipped RAMPS electronics, you might also need

    • A4988 driver board
    • RRD Fan extender

    to control the extra motor and print cooling fan.

    Everything (except the RAMPS electronics) can be sourced from a combination of MrMetric, MakerFarm, Pololu, McMaster Carr, HobbyKing, Harbor Freight and a couple of Chinese eBay sellers for around $253, including shipping to the US (2-3 weeks). I'll upload a shopping list soon.

    I've been investigating volume pricing, and I could probably offer an all-inclusive kit (everything except the RAMPS electronics) shipped Priority Mail in the US for a little less (maybe $230, depending on sourcing).

    How much demand would there be for such a kit, or for a cheaper kit without the hot ends and motors?
    What would you want in a hardware kit for the extruder? answers

    • Screws, bearings, pulleys, belts, springs and insulating tape (of course) = YES to all of that
    • Hobbed bolts? = YES
    • Hot ends? = NO but if talks with Colin go well, having an option to buy 1 or 2 heads might be cool
    • Motors? = Maybe but not really right off the bat
    • Z probe servo? = maybe but we can do that for now
    • Fans? = Yes



    If you have stock MakerFarm-shipped RAMPS electronics, you might also need

    • A4988 driver board
    • RRD Fan extender

    to control the extra motor and print cooling fan.

    if talks with colin work out hve it as an option like a drop down list check boxes,
    with info on the page about whats parts are need for witch models.

    most people with 3dprinters (except makerbot owners) have good Google skills and can source the bigger stuff.

  4. #4
    Engineer clough42's Avatar
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    Quote Originally Posted by TechMasterJoe View Post
    What would you want in a hardware kit for the extruder? answers

    • Screws, bearings, pulleys, belts, springs and insulating tape (of course) = YES to all of that
    • Hobbed bolts? = YES
    • Hot ends? = NO but if talks with Colin go well, having an option to buy 1 or 2 heads might be cool
    • Motors? = Maybe but not really right off the bat
    • Z probe servo? = maybe but we can do that for now
    • Fans? = Yes


    <snip>

    if talks with colin work out hve it as an option like a drop down list check boxes,
    with info on the page about whats parts are need for witch models.

    most people with 3dprinters (except makerbot owners) have good Google skills and can source the bigger stuff.
    Thanks. I think the small hardware is the real killer because you have to order so many small quantities of various bits from all over.

  5. #5
    Technologist
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    Quote Originally Posted by clough42 View Post
    Thanks. I think the small hardware is the real killer because you have to order so many small quantities of various bits from all over.
    I have a McFadden-dale hardware less then 300 yards from my front door so I don't really need a kit anyone that's been to one knows just how much that place rocks. Tack that on to the fact McMaster Carr's warehouse is 1.4 miles away from my shop. I'm set I can get anything fast. If you need any special part's made for a design pm me I own a machine shop both a real shop and one at home with 26 cnc's in all.

    After I get the 12" i3v I might ask Colin if he wants to make a metal ver or if he is OK with me selling a metal frame upgrade I got a OMAX 80X water jet that I don't really use much

    I will be producing hotends a little bit like the hexagon with electropolished nozzles soon..running small batch at my costs I think, I can make them for under 20$ my cost so a retail around 30$ complete.
    I plan on making the nozzle and the heat break one solid piece of stainless steel and including 4 of them in 3 sizes (.3 for 1.75, .4 for 1.75, .4 for 3.0, .5 for 3.0) by making it a single piece the hotend will work with both 1.75 and 3.0 by just changing the heat brake/nozzle

  6. #6
    Quote Originally Posted by TechMasterJoe View Post
    I have a McFadden-dale hardware less then 300 yards from my front door so I don't really need a kit anyone that's been to one knows just how much that place rocks. Tack that on to the fact McMaster Carr's warehouse is 1.4 miles away from my shop. I'm set I can get anything fast. If you need any special part's made for a design pm me I own a machine shop both a real shop and one at home with 26 cnc's in all.

    After I get the 12" i3v I might ask Colin if he wants to make a metal ver or if he is OK with me selling a metal frame upgrade I got a OMAX 80X water jet that I don't really use much

    I will be producing hotends a little bit like the hexagon with electropolished nozzles soon..running small batch at my costs I think, I can make them for under 20$ my cost so a retail around 30$ complete.
    I plan on making the nozzle and the heat break one solid piece of stainless steel and including 4 of them in 3 sizes (.3 for 1.75, .4 for 1.75, .4 for 3.0, .5 for 3.0) by making it a single piece the hotend will work with both 1.75 and 3.0 by just changing the heat brake/nozzle
    I don't mean to take the thread off topic, but I just placed an order for my 12" i3v last week and would definitely be interested in a metal/acrylic frame upgrade.

  7. #7
    Thank-you for sharing your work, looks awesome, I'm in process of printing the parts.

    Screws, bearings, and springs are my biggest concern. Maybe motors too. I've already got the hobbed bolts, servo, and hot ends.

  8. #8
    Technologist Stigern's Avatar
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    I'm amazed, could I ask what software you're using for designing such a awsome work of art?

  9. #9
    Engineer clough42's Avatar
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    Quote Originally Posted by Stigern View Post
    I'm amazed, could I ask what software you're using for designing such a awsome work of art?
    This particular design was done in SolidWorks. I'm glad you like it.

  10. #10
    Student OldSourKraut's Avatar
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    I have already started printing and sourcing parts for this project. I'm truly excited to get started on it. I have been using your hexagon cooling shroud and z-probe servo mount and am very impressed with the solid design. My question is have you had any issues with the 3cfm fan cooling both hotends on extended prints? It has been doing a good job on my single hexagon hot end, but I would be doubling the heat in that area.
    Also how critical is the spring tension used on this build? I have a hardware store across the street with a good selection and I'm hoping I could bring my completed extruder over there and find something that would work.

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