Apparatus for copy machining having a manual control

摘要

Apparatus for copy machining provided with two motor driven carriage saddles, and with a steering disc, the latter being connected to sliding contacts of two potentiometers having several tappings through a control disc and a transmission mechanism. The potentiometers are divided in four equal parts by five tappings. In each potentiometer the first, middle and the last tapping are connected to each other, and the remaining two are also connected.