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  • 3D Printing Again

    Posted on October 17th, 2017 admin No comments

    Dusted off my Kodama Trinus 3D printer, which had been sitting idle over the summer while I tried cycle touring.

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    Fixing the Trinus Leveling Bed

    It sure took a while to get everything going again.  I had just got the new leveling bed last spring, but hadn't even used it.  While setting it up, trying to get it level, I found that the motion of the printer shook the adjusting screws loose, to the point where one even fell off.  Not much good, that.  A little blue LocTite fixed them, but it was a surprise that Kodama would ship such an unreliable product.   They've promised to send a replacement set at no charge.  In the meantime, I wonder if I can damp that vibration somehow.

     A leveling screw on the Trinus bed

    A leveling screw on the Trinus bed

    It also took a while for me to get the bed leveled and set for a good first layer.  Stringy, blotchy prints, missing parts.... Part of this was remembering how to use the software, Cura 15.04.6, and set it for best results.

    Bad first layer

    Bad first layer

    Fixing the Heated Bed

    After I got most of that straight, I noticed that the heated bed wasn't heating.   Eventually tracked that down to a broken wire in the cable, which I fixed.  Discussion with a Kodama support rep led to changing the routing of the cable so the coil was not horizontal (as shown in the original assembly instructions) but vertical, in hope of avoiding future issues.

    Lights, Action, LCD

    While I was at it, I added some new LED lighting on the bottom of the X arm, and tied it in with the lighting under the extruder, adding connectors for easy future removal/upgrade. This lights the print bed nicely and I wish I had done it last winter.  Previously, I had drawn 12V from the main PCB and cut it down with a 5V regulator for the lights.  I decided the printer and heated bed needed all the power they could get, and gave both sets of lights their own 5V power supply via another wall wart.  Oh, wonderful, more cords....

    I had got tired of having the leveling  bed screws knock the LCD holder off its mount on the end of the Y slider, so I cut some notches in it to mount it on the printer bed.  That way, the leveling bed screws pass right over it.  Simple and effective, both easier and faster than printing an extension or redesigning and reprinting the original LCD mount (someone already did the redesign!).

    LCD Case Mod Composite

    Are We Ready to 3D Print Yet?

    All this had taken several days.   Let's see,

    • Fix the bed leveling screws with blue LocTite
    • Level the bed and adjust the Z-axis offset
    • Repair the heated bed cable
    • Reroute the HBC
    • Relearn how to use the software
    • Adjust all the software settings (why should they change?)
    • Remount the LCD holder
    • Add new lighting, change the wiring for the lighting, add connectors and 5V power supply

    Can I print now?  Yes.  Oh, but wait, I never did properly set the printer so I could use the entire bed.  I have adjusted the Z axis but now I need to fix the X- and Y-axes.   Darn, not enough room to get in to do the Y axis.   Trinus says to remove the slide for access, but I don't want to do that, it would be remove and adjust, reinstall and check, repeat.  Ugh.  So I printed a couple of these:

    Axis adjustment nut adaptors

    Axis adjustment helpers by drofnas

    They slip over the adjustment screw and onto the tiny 5.5 mm lock nuts, to provide more leverage to loosen them.  The first set was a bit too big, but the second scaled to 95% fit quite well.   With these, I was able to adjust the two horizontal axes so the bed is properly centred.

    Now, what to print next?...

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