Mule CNC 1.0
Description
#Introduction Mule Cnc Is Cnc Milling Machine Made With 3D Printed Parts. Cnc Machined Parts Are Very Useful To Build Cnc But They Are Difficult To Get. So I Decided To Try 3D Printed Parts. With 3D Printer, We Can Make Complex And Precise Mechanical Parts Easily. Currently I Built 1St Design (Mule Cnc 1.0) But Found Several Problems. It Can Mill Mdf Board, But Feed Rate Have To Be Limited Slow (Around 600Mm/Min). Improvement Is Required To Solve These Problems, But It Will Take Some Time. So I Decided Share Current Design For Reference Purpose. ##Design Mule Cnc Is Belt-Driven, 3 Axis Cnc Mill, Controlled By Tinyg Motion Controller. It Is Designed Like A Reprap. The Structure Is Combination Of 3D Printed Parts And Extruded Aluminum Frames. All 3D Printed Parts Are Made By Makerbot Replicator 2 3D Printer With Pla Filament. Layer Height Is 0.3Mm And Infill Is 50% Except Y Axis Frames Which Infill Is 25%. It Use 100W Brushless Dc High Speed Motor As Spindle, 2 Nema17 Stepper Motors For X And Z Axis, And 2 Nema17 Stepper Motors For Y Axis (Xyyz Configuration). Work Area Is Approximately W350-D200-H50 (Mm). ##Problems Current 1.0 Design Have Following Problems. Please Keep Them In Mind If You Use Mule Cnc 1.0 Design. ###Structural Weakness Current Design Of Spindle And X Axis Gantry Lack Enough Rigidness. This Is Cause Of Vibration Of Milling Cutter And Undermine Quality. To Avoid This Problem, Feed Rate Have To Be Limited Slow. ###Electromagnetic Noise Em Noise May Cause Unexpected Movement Of Z Axis, Especially When Spindle Operate At High Rpm. This May Cause Damage To End-Mill, Cnc Itself Or Even Injury Of Operator. This Is The Reason I Do Not Recommend To Build Mule Cnc 1.0 Design As It Is. ###Spindle Noise Spindle Is Really Noisy. ##Documents And License Stl Files For 3D Printed Parts And Bom Are Available At Thingiverse. Stl Files, Bom And This Document (Hereinafter "Mule Cnc 1.0 Design") Are Licensed Under Bsd License. I Recommend To Use Mule Cnc 1.0 Design For Reference, Although This Doesn'T Mean Any Addition Of Obligation To The License.
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