What are the special purpose machines?

Special purpose machines (SPM) are those machines which are not available off the shelf and these are not covered in standard manufacturing process; these are designed and tailored made as per the customer specific requirements.
Different layouts of special purpose machines
There are two layouts for SPMs:
In single station the workpiece is held in a fixed position where machining and sliding units are situated around it with the end goal that they can handle the part from various headings.
On account of different machining units, they may deal with the part at the same time or in grouping relying upon the math of the workpiece and machining highlights
Different types of special purpose machines include - (a) Single-station, (b) Special application, (c) Transfer machine, (d) Rotary machine, and (e) In-line operation machine.