3018 CNC X Carriage for MGN15H
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X Carriage for 3018 CNC with MGN15G Carriage and Rails that reuses original Z axis hardware and spindle holder
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- Mechanical Parts
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- Creative Commons — Attribution — Noncommercial — Share Alike
The stock X axis rods on the 3018 CNC machines is unsupported which allows increasing deflection under load the closer you get to the center of the X Axis.
Upgrading to linear rails solves for that.
Goals behind this design were:
- Maintain full X and Y Axis
- Many other mods / upgrades result in the spindle being pushed forward, sacrificing the already small Y Axis
- Minimal hardware requirement
- The only replacement hardware here are the MGN15H rail set and an interlocking anti-backlash nut, as the stock anti-backlash nut was quite poor
- The anti-backlash nut requires the use of 5mm M3 Heatset Inserts
- Easily Printable
Major item of note: Different 3018 kits may have the X axis motor / coupler on different sides. The model is oriented for the more common right-side mounted motor. If yours is left-side mounted, as mine actually is, you must mirror the model in your slicer to accommodate.
The model should be printed on it's side with the anti-backlash nut inset face facing down. I used tree supports to ensure accuracy in all holes and faces.
Print in the stiffest possible filament. I printed in standard PLA with 5 walls and 40% infill. Temperature resistance is not a factor here, and online research tends to show standard PLA is stiffer than many CF blends of other filaments.
STEP file included as I'm nowhere near professional and someone can likely improve on this design.