servo accuracy?

[shootingarts]

I have read a lot of the comparison posts but somehow I haven't seen this basic question addressed although I would think it surely has.

Considering the cost of the whole system since I am starting from scratch, when talking about probably 1200in/oz or bigger motors; staying in the same price range how does the accuracy of servo's and steppers compare?

Current plans are for a router about 50"x26" with the range of the "Z" axis still undetermined but I intend to use a variable speed router, probably the new Makita, as a spindle and maybe change to a dedicated spindle/motor combination later.

I also want to retrofit CNC to a 13x40 lathe and a Bridgeport J-head sized mill in the future so it seems likely that servo's are in my future and I might as well start with them now to learn how to set them up properly.

Current software plans are BobCAD 20 with or without MachIII as BobCAD does seem to indicate they have a control firmware module. Will these two softwares work with servo's or am I out to lunch on software? Somewhere I saw that one of them didn't work with encoders which I think might be a necessity for accurate servo control.

Thanks for any assistance on this phase of planning. I will post my frame design later in the proper forum after I have some sketches made.

Hu

[ViperTX]

Kinda depends on the servo encoder and the software that drives the servo driver.

If the servo drivers are step/direction type...then they will work with Mach III. I seriously doubt that BobCad has any idea if you're using a servo or stepper of any type.