26-01-2022
1
David-III
ADJUSTMENTS FOR SHAFTS AND BEATER
In order for the David III to operate correctly, it is important that the shafts and the beater are
adjusted to the proper heights and positions. We have written
this additional instruction to
clarify the assembly manual.
Parts of the shaft system
Let’s identify the various parts of the loom before explaining how to set the shaft heights,
correct terminology is important.
1- Cam and blocking pin
2- Shaft cords
3- Shaft bars and heddles
4- Lam cords
5- Eye bolt with adjusting nut
6- Red C-clamp to keep eye bolt
centered
7- Treadle tie-up cord
8- Treadles
9- Beater hinge hook
The David is a sinking shed loom, so the shafts are pulled downward to make a shed.
In the castle you see cords that are connected to a cam disc on the right side, and a spring on
the left. The cam rotates as you depress a treadle, and by its design and mechanical
properties, the cam reduces the force required to depress the treadle, the further the cam
rotates.
The spring pulls on the cam ensuring the shafts are pulled back up to their rest position.
In order to get a good shed, it is important to adjust the shaft height properly. During
assembly you adjust the height so that you can weave on it. Once you have threaded the first
warp, you fine-tune the shaft positions to optimize your shed. Further on in these instructions
you will find a detailed description of how to set the shaft height. In addition to adjusting the
shaft height, it is important to adjust the beater height.
On the next page you will find pictures and descriptions of the components of the system
followed by how to make the adjustments.
