Back at my scaled down build using an old adjustable drawing board as the frame. Cut area is based on using 600*1200mm ply. All built and mostly calibrated until the set chain lengths part where it pays out what would seem to be too much chain - it would put my sled off the bottom of the board and leave too much on the inside of the gears for me to take up with the pulley and bungee arrangement.
Trying to understand the algorithm and figure out what I need to tweak. Any hints or direction to others that have travelled this path would be great!
1758mm between motors.
400mm between motor gear and top of work area.
150mm from Chain at ring to centre of router bit.
Running from a Mac laptop (Yosemite).
Image below with actual chain lengths payed out. (Had to ‘tie’ them for the shot). Sled removed.