FDMeasure

FDCurve (Arduino Part)

Command List

• i
  Initialize the force sensor and variables.
• s
  Emergency stop.
• p
  Probe a target for 5 mm downward.
• r
  Print out current force sensor value reading.
• m[dist]
  Measure the force-displacement data for [dist] mm. It will print out the measured values.
• d[dist]
  Move the platform downward for [dist] mm.
• u[dist]
  Move the platform upward for [dist] mm.

Circuit

• TBA

BOM (warning: not complete)

• 2020 Aluminum extrusion (176 mm * 3ea, 270 mm * 3 ea) + right angle brakets, bolts, drop-in nuts, etc.
• 5mm lead screw (ACME thread), lead = 2 mm, length = 150 mm
• 5mm-5mm copper coupler
• Arduino Leonardo Board + proto shield
• StepStick (A4988)
• DFRobot weight sensor module (1kg load cell + HX711 driver board)
• NEMA17 stepper motor
• NEMA17 L bracket (https://www.aliexpress.com/item/NEMA-17-Mounting-L-Bracket-Mount-Step-Stepping-Stepper-Motor/32679480037.html)
• 5 mm acrylic plate (lasercutted)
• Microswitches (for endstops)
• 3D printed parts
• MGN9 Linear rail (180 mm) + block * 2 ea each
• bolts, nuts (M3, M4, M5, various lengths)