Button Load Cells for Dexterous Hand Fingertips

A compliant fingertip spreads contact over a pad; the button needs an axial resultant on its convex top. Use a guided pad or flexure to keep shear and torque out of the sensing element. A single compression channel measures the force along that axis.

• Send a section through pad, sensor, support and cover.
• Budget OD, installed stack, pad travel and cable relief independently.
• Define unloaded preload and the largest credible contact impact.

A 1 N change and a 1 N full-scale sensor are different requirements. State the smallest force change, sample rate, filter delay and permitted noise with the motors operating. Compare the complete bridge and amplifier chain at that bandwidth.

• Specify channel count and acceptable timing skew.
• Describe cable flex travel through every finger pose.
• Request force-versus-time logs for the agreed prototype validation cycle.

First validate the assembled pad with known axial forces, then repeat with off-centre contact and through the expected temperature range. Freeze the approved pad and cable routing before ordering multi-finger quantities.

• Record zero return after load removal.
• Check sustained grip creep over the actual dwell time.
• Use /resources/off-center-loading-validation for the fixture test plan.