D3D CNC Circuit Mill Data Collection
Nupur can help you with microscopes we have access to a bunch of nice ones in MSE -- but you can use our 3D one in Jerry;s office that the group owns- see (particularly the parts on validation in the paper) http://www.appropedia.org/Free_and_open-source_automated_3-D_microscope
You should also give this a quick read: http://www.appropedia.org/Multi-material_additive_and_subtractive_prosumer_digital_fabrication_with_a_free_and_open-source_convertible_delta_RepRap_3-D_printer for how we did the pcb milling in the past.
For accuracy -- you might want to use the usb microscope method. For peak loads -- you can back calculate from the mechanics and the stepper motor spec sheet -- or the fast and dirty way - keep adding mass until it starts to fail and then back off -- note this may sacrifice a component.
D3D CNC Circuit Mill Concept
Double X axis
Double Z axis
Nema 17 motor + Belt Drive everywhere
Carriage is stationary, motor + steppers move up and down
Uses spindle with 5mm to ⅛” set screw coupler or T-king spindle. Spindle mount is attached to Z axis Idler Piece.
8 mm rods
Steel bed is ¼” plate. Stationary. Boards are attached with a magnetic holder that holds the PCB board on the corners
Motor holder screws into axis idler piece
Y1 axis
Y2 axis
Carriage of Z mounts to carriage of X
X
Y
Z
Viewing direction