Hi All- I've been researching timing belts and their profiles for linear drives. The Optibelt Design Manual is full of good info. For instance they make an ATL profile which has less clearance and a negative length tolerance. Linear drives need more preload than power drives so the belt is stretched more. The negative tolerance takes this into account. Go to their site and download the manual if you want... Peter
https://www.optibelt.com/en/products...t-alpha-power/
Edit - I have a solution for the spindle clamp. Not detailed yet but i think it will work, see image. Good enough to be able to move onto assembly of the gantry. Have to adjust some of the widths yet so it trams... Peter