I have just purchased a 8 harnass table loom and have just started weaving on it. I am confused as to how I would read the draft for the weave when I don't have treadles I'm sure its very simple but I can't seem to wrap my head around it. Can anyone explain it simply
The tie-up in a standard draft tells you which and how many shafts each treadle is going to raise to make its shed opening, and the treadling tells you the order each treadle is used. A table loom has levers that control each shaft individually instead of treadles. What you need to do is to translate the tie-up and treadling into a lift plan so that you know which levers need to move to make each shed.
In the illustration below, the tie-up and treadling is on the left with the lift plan is on the right. If you look at the first pick in the treadling, you see that it tells you to raise treadle 3. If you look up to the tie-up, you see that treadle 3 raises Shafts 1, 2, 6, and 8. To weave this pick on a table loom, you need to pull the levers that control Shafts 1, 2, 6, and 8 to make the same shed. All other picks in the treadling are treated the same way.
Hope this helps,
THANK YOU SO MUCH LYNN !! This makes so much sense. I knew that it had to be simple. It was the direction I was going but couldn't quite get there
I am new to 8 shaft weaving as well. I easily understood your explamation of the treadles and the top diagram on the left. However, I don't understand the bottom left and right sections ( including the lift plan). How do you get from the left diagram to the right. I have been reading everything I can about drafts and i just keep getting more and more confused. Any additional explanation would be much appreciated.
I'm happy to try to make the draft clearer. I would like to make clear that this addresses only the tie-up and treadling portions of a draft and how to translate a treadle loom's tie-up and treadling into a lift plan for a table loom. The third element of a draft, the threading, is necessary, but to use the tie-up and treadling, the loom must already have been threaded, so it is not discussed here.
I've attached a revised version of the draft I posted earlier. This one has two additional treadles (for plain weave) added to the tie-up, and I've placed the shafts into a grid that looks like (but isn't exactly) a tie-up, which usually means that . Most 8-shaft treadle looms have at least 10 treadles, but although an 8-shaft table loom will never have more than 8 levers, it is able to produce every single shed combination of the 254 different sheds that 8 shafts can produce any time. That is because each lever on a table loom controls a single shaft, and you depress as many levers as you need to make the shed. Generally, a treadle loom can only produce as many different sheds as it has treadles (there are ways around this, but they aren't germane to this discussion).
The lower sections of the draft that you have flagged are the treadling sequence (or treadling) for the treadle loom on the left, and the actual lift plan for the table loom on the right. The treadling indicates the sequence in which the sheds are made to produce the interlacement and pattern. They are usually (but not always) read starting from the tie-up and working away, in this case, from top to bottom, and they are used in conjunction with the tie-up to make the pattern. A mark in a column of the treadling indicates which treadle needs to be depressed to make the shed at that point. Thus, to weave plain weave, you would depress treadle 1 (and raise shafts 1-3-5-7) and treadle 2 (shafts 2-4-6-8) alternately. To weave the 16 picks of the pattern repeat, you would depress the treadles in the following order (these are treadle numbers): 5-8-3-6-9-4-7-10-3-4-5-6-7-8-9-10. If you look at the column in the tie-up for each treadle, you can see which shafts that treadle is going to raise. However, once the treadles are tied, you don't need to worry about them for the most part, and only need to depress the treadles in the right order.
Because the shafts on a table loom are permanently tied to their individual levers, the shed sequence needs to be presented as a lift plan instead of a tie-up and treadling. The same information is contained in the lift plan as in the tie-up and treadling, but it has been rearranged for more efficient use on a table loom. In a lift plan, you read the "treadling" sequence top to bottom like the treadling on the left, but you need to read the entire row, not just a treadle number, to know which shaft levers you need to depress to make the shed. Thus, to weave plain weave from a lift plan, you would depress levers for shafts 1,3,5, and 7 to weave the first shed, then lower them, and depress levers for shafts 2,4,6, and 8 for the second. I should add that table loom weavers are usually the ones who need to make this translation when working from published drafts, because it's easier to generate a correct tie-up and treadling than a lift plan. However, most computer drafting programs have a feature than will make this translation for you.
(The arrows pointing from the treadling to the lift plan are just to indicate that the row in the lift plan will produce exactly the same shed as the treadle in the treadling, as you will see if you compare the shafts raised by each of the treadle numbers in the left tie-up.)
I hope this clarifies things for you a bit.