I’ve been finishing my new 3-D printer.
Here is a link to a video of one of it’s first prints: Raptosaur.
The features of this printer:
- Large printing area: 14″ diameter (or as wide as 17″) by 24″ tall
- Temperature controlled build chamber to allow building big without shrinkage problems
- Double pane Lexan window
- Carbon fiber rods
- Magnetic ball joints
- High temperature neodymium magnets in the carbon fiber rods connect them to the joints
- Heated build plate made from cast aluminum tooling plate
- High resolution (400 step), high torque Nema 23 stepper motors
- Custom direct-drive Bowden Extruder (using the same model stepper)
- Custom Hot-End using coaxial cooling (details in another post)
- The case is built using 3/4″ MDO plywood
- A Rumba controller (for now)
I had just gotten the printer working, with a few bugs to iron out. Since then I have:
- Adjusted the accelerations to fix problems with missing steps.
- Ground flats on the stepper motor shafts to keep the pulleys from slipping
- Printed stronger parts for the extruder tension leaver
- Printed a new effector assembly and bearing brackets for stronger support of the ball bearings
- Upgraded to the latest Repetier firmware.
- Switched from Cura to Slic3r.
- Built new 1/2″ solid steel stepper motor mounts – much quieter! We built these at Vocademy.
Still to do (lots):
- Finish tweaks to the Repetier firmware: I’m having some problems with tower offsets in the dev. version
- Tweak the new pressure compensation option new in v0.92 to reduce blobbing at the end of lines
- Finish other calibrations – retraction, extrusion amount
- Build mini Hall effect sensor for bed probing (doing this now)
- Assemble the new effector assembly with better attachment for the 1/2″ bearings (and will use a better adhesive)
- Dedicated heated bed power supply board
- Fan speed controllers
- Control panel
- Upper surround
So much to do… I will update this in a bit.