Originally Posted by
007CNC
Thanks guys! these are the types of feedback I was hoping for coming to this forum.
I am currently going with the acme high lead screws as I have those in hand at the moment. I will see how they perfrom, and if I am not happy with them, I will save up and go for a 3/4 ballscrew.
The nema 34 motors I already have, though I suspect they are overkill for this project.
I searched for info on the lead accuracy of their ballscres and acme screws, but I couldnt find it on their website. They are both rolled, so I think the accuracy will be similar in both cases.
The AB nut is where I am really scratching my head. I will really like to have 0 backlash in this machine, but am not sure what type of AB to implement.
My nut is plastic, and am worried that preloading might lead to premature wear on the nut. Anyone have any info/suggestion here?
Yes I do agree. rigiditgy and repeatability are higher priority than resolution in this build. I think my structure so far is very stiff (will post pictures shortly). AB nut is where I need to come up with something strong and reliable enough. I have a ballscrew with AB nut on the Z of my current machine, and it doesnt drop. I will be using the same ballscrew/nut set for my new machine.