For the David to function properly, it is important that the shafts and the beater are properly adjusted to an optimal height. These instruction are not clear in the first version of the manual, hence download the new assembly manual (july 2023) and read chapter 7 and view the video with extensive instructions 'David III / David - 3 assembly instructions'
During initial assembly, you have installed the shafts and beater. You can fine-tune the shaft heights after warping your David 3 and after you have woven a piece on it. A higher warp tension will reduce your shed by 0.5 - 1 cm. We will discuss this further below.
For optimal weaving, the beater must also be set to the right height - see helpdesk article - David 3 - adjusting reed height
You can download the detailed description via the link at the bottom of this page (chapter 7)
Checklist : If you do not have a good shed.
If everything has been adjusted and you still do not get a good shed, check the following: