Reading a Weaving Draft Without Panic
A draft is a four-part diagram that tells you how the loom is threaded, which shafts are tied to which pedals, the order you press them in and what the cloth will look like.
Why drafts exist
On a shaft loom the pattern is not in the cloth; it is in the set-up. Which shaft each warp thread goes through, and which shafts lift together on each pick, decide the structure completely. A draft is a compact way to write that set-up down so that another weaver, or you in six months, can reproduce it exactly.
The four parts
- Threading, usually along the top: a grid with one row per shaft and one column per warp end. A mark shows which shaft each end is threaded on.
- Tie-up, in a corner: a small grid showing which shafts are connected to each treadle (or, on a table loom, which levers to raise together).
- Treadling, down the side: the order in which you press the treadles, one row per pick.
- Drawdown, the large grid in the middle: a picture of the resulting cloth, square by square, showing where warp is on top and where weft is.
A straight four-shaft twill
Threading: 1 2 3 4 | 1 2 3 4 | ... Lift order: 1+2, 2+3, 3+4, 4+1, then repeat
Each pick lifts two adjacent shafts, and the pair moves one step along each time. That one-step shift on every pick is exactly the "step" described in the definition of twill, and it is why the diagonal appears. Reverse the lift order and the diagonal runs the other way.
How to read a drawdown by hand
- Take the first row of the treadling and look up which shafts that treadle lifts in the tie-up.
- Go along the threading. Any end threaded on a lifted shaft is up, so warp shows on top; colour that square in.
- Every other end is down, so weft shows; leave that square blank.
- Move to the next treadling row and repeat.
After a few rows, the pattern emerges on paper. Doing a small drawdown by hand once is the fastest way to understand what weaving software is doing for you.
Where drafts came from, and where they went
The idea that a pattern could be stored as a sequence of choices made the Jacquard machine possible. Patented by Joseph Marie Jacquard in 1804 and building on earlier French inventions, it controlled a loom with a chain of punched cards, each card governing one row of the pattern. A handweaver's treadling sequence is the same idea on a smaller scale: a list of instructions, one per pick.
Common traps
- Drafts can be written from left to right or right to left, and shafts numbered from front or back. Check the convention before threading.
- Some drafts show a "rising shed" tie-up and some a "sinking shed". The picture is the same; which marks mean "up" is not.
- Thread a few ends, weave a few picks, and look before committing the whole warp.
Once a draft is on paper, the question becomes how its repeats fit across your cloth. That is the maths of repeating patterns.
Revised 2026-11-09 · Margit Halloway