IBM PC Circuit Board Testing Machine
Linear stepping motors with air bearings are used to position a probe onto test points
Linear stepping motors with air bearings are used to position a probe onto test points. This impressive 3-axis robot which had no rotating components was one of two supplied for special disk-drive circuit-board probing. Movements were extremely rapid and precise without backlash.
![ibmpc_1 IBM PC Circuit Board Testing Machine](https://www.servernetworks.uk/wp-content/uploads/2024/02/ibmpc_1.jpg)