Re: [CAD_CAM_EDM_DRO] servo motors for BP clone

Zafar,

It really depends on how you plan to use your machine. Many are satisfied with smaller servos and larger reduction. And others use larger servos. I'm running 40 lb-in servos on all three axis with a 2.5:1 reduction. Some would say this is way overkill however, I just ran a production run of 340 1018 blocks and had to remove the middle of the block. An area of 2.5"X3"X.875" deep. Using 3/4" roughers and 5 passes on each. 5.5 minutes each to complete. Smaller servos would've took longer. Thats the difference. The X motor doing most of the work barely got warm after 10 hours of running continually. I'm sure it didn't do the ballscrew any favors but that all has to be weighed in to the profit made. Although a 28 lb-in servo would probably had enough torque to do the same. 40 lb-in on X and Y are a bit much.

P.S. Have you considered using Mach3? It's evolving into a very good CNC software. Thats what I use and I like it alot.

Ron

Zafar Salam <zafar@...> wrote:
Hi,

After running my BP clone on steppers and acme screws for 6 months, I've decided to upgrade to ball screws and servos. What size motors would be suitable for that purpose. I'll go with geckos and turbocnc. I would appreciate help from anyone who has alread done that as this would be my first experience with servo motors and drives.

Zafar

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