Specifications:
The Altair 255 is a vertical cup seamer machine operating at 5,200 RPM, designed for executing elastic simple and double locked chainstitch seams. It includes machines capable of single-thread chainstitch. The feed mechanism involves synchronized cups rotating in opposite directions with individual movement. Features include instantaneous pushbutton stitch length adjustments, pump lubrication, and chain-off rollers synchronized with the feed.

Procedures:
The machine is equipped with an uncurling guide positioned at the entrance of the cups to ensure fabric edges reach the sewing area uncurled and perfectly matched. The guide can be switched between working and stand-by positions using a knee-press control or a separate pedal. The guide blades automatically close on garment edges when the knee-press is released. An additional knee-press adjusts the vertical movement of the guide to vary the seam distance from the fabric edge when sewing over cross seams.

Components and Kits:
Various folders and stands are available for the machine, including automatic and semi-automatic options. Specific codes for these components are provided, such as P101626-4-11 for Fixed Reverse and P101678-4-01 for Fixed Right.

Machine Variants:
The Altair 255 includes a 1 needle machine for assembling operations on full-fashion knitwear. It supports both medium and heavy knitwear with a flat knitting machine gauge of 5-10, and light to medium knitwear with a gauge of 12-18. Specific models like 255-00-01 and 255-00-03 are detailed with their respective seam and thread specifications.