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Posts posted by charles-design

  1. Hi all, 

    I've added an attachment to the head of my UM2 and consequently I need to change the pre-print routine - otherwise, a crash would occur. To be clear, the routine in question happens directly after pressing the print button and lead to the head moving all the way to the front of the printer.
    Within the Cure machine settings I've tried:

    • Decreasing the size of the bed
    • Increasing the size of the head


    Neither of the above has made any change, can someone point me in the right direction?

  2. Hi All,

    I'm selling my UM2 as I'm looking to create my own build. The only mod is an extruder change for Roberts version. Unfortunately, it doesn't come with the box which currently resides in the UK.

    1,200€ or nearest offer - pick up only (Amsterdam)

    Feel free to call me +447414780380

    Thanks, Charles


  3. @pm_dude I should of been more precise, by directly driven I mean straight off the stepper shaft. I don't think bowden is too much of an issue. On the other hand the flexible shaft idea looks great!

    @Labern Yeah I'm currently using roberts extruder and it's not really working out, the knurled wheel is constantly slipping on the the filament. I've tried just about everything without sucess.


  4. Hi there,

    So after having tried different designs of extruder for my UM2 I can't seem to get the reliability I was looking for when purchasing my machine.

    I'm convinced the combination of a directly driven extruder with a knurled wheels is a combination that's banned to fail during long prints. Just as a reference the extruder on my reprap mendel which is geared at around 1/30 with a hobbed bolt has never failed after two years of solid use. I'm sure anyone that's used a UM1 will tell how much more reliable the extruder is on that.

    So I'm willing to put some money towards a new extruder and I'm looking at http://micron3dp.myshopify.com/collections/all-metal-extruders/products/rostock-delta-extruder-bowden-type, has anyone tried it? Any feedback?

    I'm assuming that considering I make a mount to attach it the machine all I'd have to do is calibrate the Steps/mm?

    Thanks :)



  5. Hi there,

    Unfortunately due to the lack of options in Cura I would like to go back to using Slic3r.

    So my question is what do I have to change in to make it compatible?

    Will copying the start/end code from Cura in Slic3r be enough?

    If anyone would be kind enough to post these here, it would be much appreciated!

    Thanks :)



  6. Hi there,

    So I made the change to Roberts extruder but after a few test I'm yet to get a decent result out of it.

    The green print (Poor Quality Filament) was made using the stock extruder and the clear print was with Roberts.

    After this I repeated the test with both higher and lower tension, both of which came out worst.

    Am I missing out on a trick to get the tension right?

    Is the correct tension in a very small bracket?

    Most of the time it's printing the skirt fine but starts under-extruding on the actual print.

    Many Thanks,


    IMG 4140


  7. The white plastic indicators are both on the up position.

    Does the allen key screw allow to adjust the pressure against the filament or do you just move the white parts?

    Also is it possible to update the firmware through the sd card?

    Thanks for the speedy response!


  8. Hi there,

    I just unboxed my UM2 so far very happy by the quality of the build.

    My issue is that when I start a print when extruder just grinds against the filament creating a dent and stopping it from working properly.

    Is the bearing pushing too much or too little?

    How do you adjust this?

    Many thanks,



  9. Hi there,


    I wanted to build a camera stabilizer for medium to large size dslr's there's still a few changes I want to make but It's nearly there.


    The top part uses 2 fixed threaded rods to fine tune the position of the camera.

    The main part is a 3 axis gumball which uses one 68mm bearing and three 18mm.


    I would love to hear any suggestions for improvement.

    I will post all the files on youmagine once I'm happy with it.













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