NordicCNC's build log

[jarjar]

1. You need to add a safety factor.
2. The root diameter of a 16mm ballscrew is not 16, but 14-15 (outer diameter minus ball grooves).
3. Don't use fixed-fixed unless you know exactly what you're doing. The ballscrew needs to be pre-tensioned properly to account for thermal expansion or you will introduce backlash.

[NordicCnc]

1. You need to add a safety factor.
2. The root diameter of a 16mm ballscrew is not 16, but 14-15 (outer diameter minus ball grooves).
3. Don't use fixed-fixed unless you know exactly what you're doing. The ballscrew needs to be pre-tensioned properly to account for thermal expansion or you will introduce backlash.

Good points. A 2:1 ratio resulting in the ballscrew rotating with 1500rpm, I will have to go for either 2010 or 2510 ballscrews, and decrease the ballscrew length to about 1100-1200mm.. This will give me a safety factor of around 1.2 with fixed-floating bearings.

Seems ridiculous to have to use any larger diameter ballscrews. I have not seen anyone else using that here on the forum. How does everyone else achieve 15-20m/min?