Building the test stand

Electronics:

seperate arduino with serial connection to PC

5 load cells

a case and orderly wiring

Software

use exact force cell positions to calculate forces

write calibration software

provide a visual output (either a display on the device or something similar)

Hardware: (keep easy assembly in mind)

clamping to the rails

with vertical board to mount cells

3 plate sandwich with interfacing to rail blocks and flapper

axial bearing in there

3 force cells in there

ledge in front to attach to cells

something to bridge the river, e.g. wooden planks

wires nicely mounted and bundled

maybe lasercut the entire plate incl. holes (for accuracy)

put bearing on lower level (for more weight on top)

watch out for unwanted reaction forces

upper load cells should rotate freely around x axis (to avoid z forces)

and should not produce forces in y direction (e.g. via slit & convex holder design), or by placing them inline with the bearing)

latches for calibration devices

prevent contact wood plate - load cell

Measurements:

Rail:

diameter: 20mm

track: 80mm (changeable)

center of rail to upper end of rail block: 21mm

bearing

diameters: 40mm, 60mm, height: 5mm

Load cells:

air between floor and cell: 5mm+

⁠

Strategy:

3d Printed Rail Block (mounted via cable ties)

3d Printed load cell mount for wood

3d Printed bearing holder as inset for wood

3 wood plates (cut with normal tools) (e.g. 5mm plates?)

Cabling:

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