The design files for the Maslow ring system
The ring system was designed as an improvement over the old chain attachment system which was two L brackets. The L brackets attached the sled at two fixed points which meant that the math relating the lengths of the chains to the position of the sled needed to take into account the sled's rotation which is very complex. It also meant that other forces like the dust collection hose dragging could impact accuracy.
The solution to these issues is to have the chains meet at a single point at the router bit. This makes the router bit the center of rotation and greatly reduces the math required. The issue is that the router bit is already taking up that space.
A number of solutions have been proposed where the chains attach to something which moves in a circle around the router bit and point directly to it...essentially adding a virtual section of chain which meets at the router bit.
The proposed solutions include using large bearings, linkages which when moved move in an arc around the router bit, and this solution where small bearings run along a ring.
The files are free to use with no restrictions on personal or commercial use.
