Step 16.

Quality Control Test!

The prosthetic hand must pass across several areas in order to be given to a recipient. Please be careful and check the following.

Visual Inspection

All Pins, Screws, and Side Bolts SUB-FLUSH with exterior and are tight.

Mechanical Inspection

Completely close and release both Digits at least five times. Completely close and release each Digit individually at least five times. Close Digits to align the tips with the Fixed Digits (a partial close) and open.

Audio Inspection

Listen for strength in the ratcheting of Geared Digits. Both Digits should be robust and similar to each other in ratcheting sound and feel. Slowly close Digits starting in the fully open position.

Repair

If ratcheting sounds weak or quiet, check for damaged Compression Springs by removing outside Fixed Rigid Digits.

Repair

If digit does not fully open with a clean snap, check for misalignment between the Digit Pin and the Compression Spring. Replace the Compression Spring in all instances if damaged.

Geared digit sticks in between Rigid Digits – check for excess plastic and check for alignment of Side Digits. If 4x Side Bolts are over tightened it can pinch the Geared Digit and restrict movement.

Check for and insure ALL pins are sub-flush (below surface). Not FLUSH or ABOVE SURFACE.

Check Arm Band / Cuff

Put on your Arm securing Velcro Arm Strap. Follow each of the Three Straps to the Plastic Cuff and check for any twists. Remove and fix any twists. Leave 4″ of Tail on Straps.