Servo size?

[tomvikse]

I got the 1440 lathe. Link below..
Do i go for the 400w stepper??
1:6

https://www.omc-stepperonline.com/e6-series-400w-ac-servo-motor-kit-3000rpm-1-27nm-17-bit-encoder-ip65-e6-rs400h2a2-m17s

https://www.lunakatalogen.no/storage/ED35D2AA87FC78951A1D72280E107F677B41DE15BCAF532CC7DDCB7FEFC34967/bf9cc6d0281644a1ad168302d3d09338/pdf/media/f986a222afbf42f99bb758fcc3f26177/819661.pdf

[johnsonm]

I also have a 1440 lathe. I found that my gearbox was stiff even after thorough cleaning. The 180W servo I used was a bit under-powered, and I would choose a higher-power servo if I were doing this again, so your idea of going for a 400W servo makes sense to me. I have pondered upgrading to a more powerful servo, and the one you highlight might be a god choice. I'm running 6:1 gears feeding 275:144 in the gearbox. So that's pretty close to 12:1 total. And 400W is more than twice 180W. Inasmuch as our lathes are similar, that should be good. If you find that you need more power, you could always change your input gearing the way that I did.

https://forum.makerforums.info/t/building-an-electronic-lead-screw-for-my-g0709-lathe/88246?u=mcdanlj