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Level: high school. Curriculum Level Notes.
Curriculum Standards Addressed: See Curriculum Standards.
Concept: applied lesson in using the D3D CNC Circuit Mill to mill circuits by using precise bed leveling.
Prerequisites: Availability of D3D CNC Circuit Mill. Background curriculum: [[3D Printing Toolchain 101. KiCAD 101 - up to mastery of Gerber file generation. Soldering 101.
Lesson Duration: 4 hours. With the D3D CNC circuit mill in working order, Marlin modification would take 1 hour to get it working. Generation of manually-generated patterns from images - Milling File Generation Using Open Source Software 101. Generation of sample milling patterns from KiCAD: 1 hour. Milling experiment: 1 hour.
Badges awarded - Open Source Circuit Milling Badge verifying the use of open source machines and open source software for producing useful circuits.

Work Plan

Review and replicate modified experiment of PCB Milling with Marlin.
Ask the author for the gcode file if possible
3 sessions of one hour or one 3 hour lab: 1 hr for Marlin modification. 1 hour file generation. 1 hour for milling.

Gaining an appreciation for precision on the sub-millimeter scale
Learning to mill circuits starting from copper boards
Learning how to level a conducting surface very precisely using touch probing using open source software