Jump to content

Anyone try the Bull Dog XL on their Ultimaker?


Recommended Posts

Posted · Anyone try the Bull Dog XL on their Ultimaker?

The reason I ask is because it seems that people have problems with under-extrusion and skipping steps. This is geared design, so it should help. I have one installed on my Solidoodle 2, and when I get my Ultimaker 2 I intended to try it out.

Does anyone have a geared feeder installed on their printer?

I am not affiliated with reprapdiscount in anyway.

here is a linkhttp://www.reprapdiscount.com/mechanics/64-bulldog-xl-extruder.html

 

  • Link to post
    Share on other sites

    Posted · Anyone try the Bull Dog XL on their Ultimaker?

    The UM2 splits the extruder into 2 separate parts - the feeder on the back of the machine and the nozzle on the print head. This makes the print head very light weight and you can have accelerations of 5000mm^3/sec. So I don't think it would make sense to use these extruders on the UM2 head.

     

  • Link to post
    Share on other sites

    Posted · Anyone try the Bull Dog XL on their Ultimaker?

    , the Bulldog XL can be used as a direct-drive OR a bowden-drive feeder tough, see the below picture:

    20131125040121-bulldog_XL_bowden_option.jpg?1385380881

    i do not know of anyone that tried the bulldog xl, tough i like the idea of a geared feeder and i am myself in progress since a few weeks ago of designing a simple geared feeder upgrade for the UM2 that also reuse the most parts possible (will probably test my first prototype in a few days)

     

  • Link to post
    Share on other sites

    Posted · Anyone try the Bull Dog XL on their Ultimaker?

    i do not know of anyone that tried the bulldog xl, tough i like the idea of a geared feeder and i am myself in progress since a few weeks ago of designing a simple geared feeder upgrade for the UM2 that also reuse the most parts possible (will probably test my first prototype in a few days)

     

    We've tried the geared feeder route. It reliability quite a bit, but the axis still gets quite hot, causing flattened material problems that you can also experience in the UM2. Another problem was that in the current casing a geared feeder won't really fit.

    But the 5:1 ratio of the bulldogXL will really help.

    We're actually testing something in between the UM2 and UMO feeder right now. Which is looking quite interesting so far. (That's all I can tell)

    Note that the loading&unloading procedure of the UM2 needs adjustments when you use any kind of gearing system.

     

    • Like 2
    Link to post
    Share on other sites

    Posted · Anyone try the Bull Dog XL on their Ultimaker?

    We've tried the geared feeder route. It reliability quite a bit, but the axis still gets quite hot, causing flattened material problems that you can also experience in the UM2. Another problem was that in the current casing a geared feeder won't really fit.

     

    The problems with the hot axis is one of the problems that i am quite certain my design will fix, since there is no thermal connection to talk about between my motor axis and my drive axis, it will "only" have a gearing ratio between 1:8 and 2:25 tough (depending on wich exact components i go with) and it will be a simple diy bolt on to the back of the UM2 costing less than 20€ in parts :)

     

    We're actually testing something in between the UM2 and UMO feeder right now. Which is looking quite interesting so far. (That's all I can tell)

     

    That sounds quite intresting :)

     

    Note that the loading&unloading procedure of the UM2 needs adjustments when you use any kind of gearing system.

     

    Yup, i am aware of that.

     

  • Link to post
    Share on other sites

    Posted · Anyone try the Bull Dog XL on their Ultimaker?

    Hi,

    has anyone tried the Bulldog XL on an UM 2, yet ? It seems that the gear can be taken off and that then it has about the same size as the stock extruder / feeder. It that true ? Has anyone tried this setup (stock stepper motor with just the bulldog xl feeder / extruder without the gearbox) ?

    Regards,

    Nils

  • Link to post
    Share on other sites

    Posted · Anyone try the Bull Dog XL on their Ultimaker?

    I using the Bulldog XL on a Ultimaker Original since a half year and I'm really happy with this feeder. I think that a geared feeder is a better solution than a direct feeder anyway.

    This is my design for using the Bulldog XL on a UMO:

    https://www.youmagine.com/designs/bulldog-xl-extruder-mount-for-ultimaker-original

  • Link to post
    Share on other sites

    Posted · Anyone try the Bull Dog XL on their Ultimaker?

    Did you modify the firmware because of the gear ratio ?

  • Link to post
    Share on other sites

    Posted · Anyone try the Bull Dog XL on their Ultimaker?

    Yes, i set the esteps/mm to 495

  • Link to post
    Share on other sites

    Posted · Anyone try the Bull Dog XL on their Ultimaker?

    Where can I find this setting ? In the Configuration.h ? What is it called ?

  • Link to post
    Share on other sites

    Posted · Anyone try the Bull Dog XL on their Ultimaker?

    Where can I find this setting ? In the Configuration.h ? What is it called ?

     

    Yep.. :

     

    #define DEFAULT_AXIS_STEPS_PER_UNIT

     

    ... but usually you don't need this.

    One can set the steps per mm for each axis with gcode command M92 (and store the settings with M500 to EEPROM)

    This applies to the UMO and to the UM2 as well.

  • Link to post
    Share on other sites

    Posted · Anyone try the Bull Dog XL on their Ultimaker?

    @tinkergnome: I guess I have to change the 282, right ?

     

    #define DEFAULT_AXIS_STEPS_PER_UNIT   {80.0,80.0,200,282}

     

  • Link to post
    Share on other sites

    Posted · Anyone try the Bull Dog XL on their Ultimaker?

    @tinkergnome: I guess I have to change the 282, right ?

    i think so... usually the order of the array elements is X, Y, Z, E

  • Link to post
    Share on other sites

    Posted · Anyone try the Bull Dog XL on their Ultimaker?

    Hi i have bought the bulldog XL for my Ultimaker original +.

    the Bulldog XL Extruder Mount is PERFECT   markerspatz!!

    my question is the wiring from the ultimaker

    for the bulldog is

    RED A+

    BROWN A-

    YELLOW B+

    Blue B-

    i dont find any spec. of the wiring

    sorry my english is not so good

  • Link to post
    Share on other sites

    Create an account or sign in to comment

    You need to be a member in order to leave a comment

    Create an account

    Sign up for a new account in our community. It's easy!

    Register a new account

    Sign in

    Already have an account? Sign in here.

    Sign In Now
    • Our picks

      • Introducing Universal Cura Projects in the UltiMaker Cura 5.7 beta
        Strap in for the first Cura release of 2024! This 5.7 beta release brings new material profiles as well as cloud printing for Method series printers, and introduces a powerful new way of sharing print settings using printer-agnostic project files! Also, if you want to download the cute dinosaur card holder featured below, it was specially designed for this release and can be found on Thingiverse! 
          • Like
        • 10 replies
      • S-Line Firmware 8.3.0 was released Nov. 20th on the "Latest" firmware branch.
        (Sorry, was out of office when this released)

        This update is for...
        All UltiMaker S series  
        New features
         
        Temperature status. During print preparation, the temperatures of the print cores and build plate will be shown on the display. This gives a better indication of the progress and remaining wait time. Save log files in paused state. It is now possible to save the printer's log files to USB if the currently active print job is paused. Previously, the Dump logs to USB option was only enabled if the printer was in idle state. Confirm print removal via Digital Factory. If the printer is connected to the Digital Factory, it is now possible to confirm the removal of a previous print job via the Digital Factory interface. This is useful in situations where the build plate is clear, but the operator forgot to select Confirm removal on the printer’s display. Visit this page for more information about this feature.
          • Like
        • 0 replies
    ×
    ×
    • Create New...