Hopefully this isn't a beaten to death topic, but I've searched around and haven't found a clear cut answer as of yet. I did see the FAQ on servo's, but it's a lot calculations etc and in all honesty I'm not really quite sure what the load requirements will be. The one true way to know is to ask someone who's been there, so I'm asking now
I plan on doing an X3 or RF-45 size machine in the near future with DC servo's and Gecko's, and it will have ballscrews on all three axies. I'm hoping to get reliable, accurate 3D cutting around 25-30ipm in metals.
So my questions are; what size servo motors would be adequate for this task? Best I can tell is something around 400oz/in for the XY and 600oz/in for the Z would be ideal. Also, I've seen a lot of DC servo's around the surplus market. Some are brushed, others are brushless. Is the Gecko compatable with both and which is better for this application? I suppose since I'm on a roll I'll ask what ballscew pitch would be a good match. 5tpi seems pretty popular but would it provide the torque multiplication I need?
Thanks everyone, I know it's a lot of questions but in the end it will be a lot of money for me too, I'd like to do it right the first time.