Shed

In weaving, the shed is the temporary opening between the upper and lower warp ends, created by raising some heald frames and lowering others. The weft is inserted through this opening on each pick.

Shed formation, weft insertion, beat-up, and take-up are the four primary motions of a weaving loom. The shed must open cleanly, stay open long enough for weft insertion, and close cleanly — any irregularity causes warp breaks or weft mis-insertions.

Shed-related defects are common at higher loom speeds, especially when warp tension is uneven or heald frames are worn. The fault profile shows up in MobiOffice as concentrated warp wastage on specific machines, surfaced via per-machine variance flags.

RELATED TERMS
Warp
Warp refers to the lengthwise yarns held under tension on a loom. The warp is pre-loaded as a beam and runs through the loom for the duration of the order.
Weft
Weft is the crosswise yarn inserted across the warp to create woven fabric. Each insertion is called a pick.
Heald Frame
A heald frame (or heddle frame) is a rectangular frame on a loom that holds heddles — the wires or cords through which warp ends pass. By raising and lowering different heald frames, the loom creates the warp opening (shed) for each pick.
Pick
A pick is a single traversal of the weft across the warp. Pick density — picks per inch (PPI) — is a primary fabric specification.

Want to see how these workflows run in MobiOffice?

Send your loom count and loom type on WhatsApp. We'll walk you through the relevant screens.

WhatsApp Us
2-hour reply, Mon–Sat
WhatsApp Us · 2h reply