The forces that act on the lathe tool during machining are measured in three directions: cutting force, feed force and passive force. The 3-component force measurement device uses a strain gauge system. Investigation of cutting forces during turning is fundamental to the teaching of cutting techniques. The set-up comprises a transducer, which also holds the lathe tool, and an amplifier unit with digital displays. The well-structured instructional material sets out the fundamentals and provides a step-by-step guide through the experiments. The amplifier unit supplies the strain gauge bridges and displays the measured values on three digital displays. The experiments must be conducted in a workshop environment, as a suitable lathe is required.
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