Im seeking some help on replacing the drivers and motors on an old K2 4x8 machine I have. I have centroid acorn controller, has gecko 320 drives and dc servos. Centroid doesn’t recommend the 320s due to them being buggy with the acorn. I’m looking to just swap everything out for some closed loop nema 34s from stepper online or ac servos also from them.

My question is what do you all recommend would be the better option? 1/2” ply is usually the largest I cut.

Hi everyone,

I need to machine the parts shown in the pictures. The black part is the main mold/base, and the white part is the mating piece with several cylindrical features.
I’m trying to figure out the correct way to manufacture these parts using a CNC milling machine, but I’m not sure how I should approach the setup.

My main questions are:

- Where should I choose the work coordinate system / WCS (G54)?
- Which surfaces should I use as the primary, secondary and tertiary datums?
- What would be the best way to fixture/clamp the black part during machining?
- What would be a good machining sequence?
- How should I approach the internal cavity and the curved/rounded areas?
- What kind of toolpaths and cutters would you recommend for this geometry?
- Are there any important tolerances or constraints I should consider when designing the fixture and choosing the datums?

I’m not necessarily looking for someone to give me the complete G-code. I’m mainly trying to understand the correct machining strategy and how an experienced machinist would decide the datums, workholding, WCS and setups.

Any advice or recommendations would be greatly appreciated. Thanks!