I am preparing a warp for the 10 shaft damask attachment on the Glimåkra loom. Below you can see the warp beamed and ready to be threaded through the back set of pattern harnesses.
The set up for damask is a 6 shaft 6 unit threading. That is a 6 shaft ground damask with a 6 thread unit on the pattern heddles.
Here is a view of the pattern heddles being threaded. The warp was prepared with 3 threads in the cross. Therefore one complete "there and back" of the threads results in 6 threads (2 sets of 3).
Above - the pattern heddles being threaded. The pattern heddles are grouped into units (4-8 depending on ground weave) and joined at the bottom by a lingo weight.
once all the pattern heddles are threaded, the beater, knee beam and breast beam are removed and the ends are selected from one of the pattern heddles (also using the lease stick threading sequence as a guide) and then the same end goes through one ground heddle on shafts 1-6. Each end is threaded two times - once through the pattern heddle and once through the ground heddle
The ground threading goes rather quickly as the heddles have long eyes and can be threaded by hand without a hook. The threads are then dented in the reed and attached to the cloth beam.
The shafts (both sets) are then adjusted in height.
Here it is in a little more detail:
More detail: Double harness & Damask weaving - loom has two sets of shafts: In the back of the loom are the pattern shafts (10-100) which hold the pattern threads, and the regular shafts on the countermarch using long eye heddles (2/3 inch eye) in the regular shaft location.
The pattern heddles are grouped into 6 per unit (or unit determined by weave) and are weighted by a lingo (long heavy looped hook to weigh down pattern shaft unit). The entire warp is threaded, 1 thread thru 1 pattern heddle grouped into 6 - joined by a weight whilst being held on a temporary holding shaft.
The units once threaded are dispersed onto the pattern shafts according to the pattern drawdown (can be anywhere from 10 to 100 shafts - the more shafts the more of an extension the loom requires). Even once the weaving has begun, the pattern units can be re-distributed to create a different pattern sequence such as straight draw, pointed repeat or single large point.
Then the regular ground shafts are put back in place (these use long eye heddles but regular length of 11.5 inches long. The warp which is already threaded thru the pattern heddles on separate shafts from the regular ground shaft, is then threaded in a straight draw as with normal weaving (ground weave is a 6 shaft satin) Denting and tying onto the apron is done in the usual way. Therefore; each thread is threaded through two sets of heddles - one pattern and one ground.
The long eye heddles allow the back group of pattern shafts to manipulate the threads whilst allowing the ground weave front shafts to move. The blog was a very brief synopsis of the type of weave. I have a few resources on damask if you would like to know more.
