Electronics and Other Parts:
I am using 4) Gecko G320's to drive my Servos. The geckos are connected to the PC via the CNC4PC C11G BOB.
I am using a Keling 72V 20A (Includes 5v Regulated) unregulated Power Supply. This was probably overkill, I have an amp meter and havent seen it rise above 3.5A max with all 4 servos running at load. I havent seen any issues with running the servos beyond their actual specs. Had I known they were only rated for 38V nom. I probably would have gone a little less.
I use shielded CAT5 Cable for my encoder wiring and sheilded 16awg cable for my servo power. Wiring is cleaned up with Network cable breakouts at both ends and SLR connectors for motor power.
I am using leadscrews purchased from LL. They are 1/2" Acme 6TPI. They were cheap, and regret it a little. I was going to go with ball screws but couldnt afford it at the time. The X screws are too long and cause the screw to whip pretty bad. It keeps my top speeds below 150IPM.
To try and combat the screw whip I have 35mmOD x 10mmID 6202 bearings. There are 2 on the X motor drive end and 1 on the other X end so each X screw has 3 bearings.
The leadscrew nuts are made of UHMW and were made by LL. |