David 3 - Adjusting beater height

The David shed is created by pulling shafts down.   The optimal shed is created with the lower shed lying on the shuttle race so that your shuttle slides smoothly over it.

Also check whether the shafts are adjusted to the right height (see the attached pdf and additional helpdesk articles). See the new edition and video of the David 3 assembly manual , chapter 1c and chapter 16.

If you weave too close to the reed, the shed becomes smaller and the lower half of the shed can start to move up slightly above the shuttle race. We recommend that the distance between fabric and reed is 18 cm (7”) or more. After every 5 cm (2”) of weaving, advance your warp a little further.

Another situation that can arise when you start weaving a new project - the tie-on bar, when it has not yet passed the breast beam, will move your warp upwards slightly, also lifting the bottom of the shed up above the shuttle race.

It is also important that the left and right sides of the beater both rest on the buffers equally and arrive at the buffers at the same time. This is mainly determined by placing the hinge hooks of the reed exactly at the same height and perpendicular to the side upright.

Position of the warp in the reed when the blocking pin is removed.	When a treadle is depressed, the bottom shed should rest on the shuttle race.
Checklist The hinge hooks mounted on the lower sidebar must be exactly level and perpendicular to the side. The locking nut must be tightened securely. The distance measured from the floor to the center of the shaft should be 5 cm. Measured from the underside of the lower crossbar, the distance is 8.5 cm. Check whether the shafts are placed at the correct height - see article David 3 - adjust shaft height
5 cm from floor	8.5 cm from under the cross bar