Building the C-Bot 3D printer: Part 19 : First print!

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May as well show the good stuff first:

Even though the electronics still look like a giant pile of spaghetti out the side of the bot, there wasn’t much left stopping me from actually printing something.  But, a few things still needed addressed:

  • My build-platform wasn’t remotely level, it was drooping way too much on the front.  With the help of my wife and son, I loosened up all the bolts holding the cantilevered 20×40 beams to the Z-stage, had my son slightly lift up on the end of it, and I re-tightened everything while my wife helped hold a wrench on the rear of the nuts where needed:  That got me able to level it with some z-endstop adjustments.
  • Based on where the hot-end homes, there’s a 2mm X & 25mm Y offset from the corner of the build platform (calculated my manually moving the toolhead on X&Y via the LCD to the corner of the build platform).  I couldn’t figure out where in Marlin to enter these values:  Obviously the head needs to move to this position from home and ‘start’ the print there, as 0,0,0.  I slice using Simplify 3D, and I finally found these offsets in the “G-Code” section of the Process window, under “Global G-Code Offsets”.

I also needed to configure Simplify 3D to actually recognize this machine:  Luckily version 3.0 came out just yesterday, and has a new machine ‘Configuration Assistant’ that made the process of ‘building’ my machine pretty easy.

From there, I imported a simple 1cm calibration cube, slapped some blue painters tape on my build platform, and fired it off.  It’ immediately started moving, but not extruding:  Come to find out, even though I had all my stepper wiring in the Rumba the same, I had to flip the harness on the Bowden extruder 180 to get it to extrude the direction.  With that resolved, take two worked flawlessly:  A few minutes later, a tiny 1cm cube appeared:

first print

1st print!

This was printed with a 1.0mm E3d-v6 Volcano nozzle, at 500micron layer height.  Beefy!  Surprisingly using my calipers, it was within .02mm tolerance on all axes:  Not bad for a first print!

Safe to say I’m pretty happy that it ‘just worked’ on the first try.  Now that I know it works I’m going to clean up all the wiring next, then get into the print calibration phase.


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Trouble in paradise: The Replicator quit extruding...
Building the C-Bot 3D printer: Part 20 : Electronics Day 3: Swapping stepper drivers
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