I'm looking for 1um in 500mm resolution and also accuraries in the order of 1um.
What does it take to achieve this.
I was looking for a 3 axis gantry type build, with 500mm x 500mm work area, is that the way to go?
I have read this forum post exhaustively
https://www.cnczone.com/forums/linea...60578-cnc.html
And from what I gather from that post the minimum requirements are
1. C1 / C3 ground ball screw with 3mm lead.
2. Ultra precise encoder 24bit+
3. AC Servo motors or Linear motors
4. Good air conditioning
5. Good measuring equipment
Also I have read user hanermo's post
https://www.cnczone.com/forums/linea...ml#post1656188 and he gives quite interesting advice.
I have a few questions
1. Can I get away with C7 rolled ball screw, my thinking is with ultra precise encoder and servo's and maybe a optical linear scale, the controller should be able to accurately position itself even though the screw is inaccurate?
2. Can I get a off the shelf gantry structure with decent accuracy so that will speed up my build.
3. For encoder/ linear scale Renishaw Resolute what kind of price range does one expect?
4. Servors DMM ac servo's ok? I mean with their integrated 16bit encoders? Can steppers do the job, by running it in closed loop mode?
5. What kind of motion controller / software would I need for achiving these accuracies?
6. How does the optical linear scale work in conjunction with the integrated servo encoders? I mean does the optical linear scale output go in seperately to the motion controller, and then some software needs to be written for closed loop control?
Thanks in advance