"Origami" CNC Plasma Build - folding 1200 x 600mm cut area

Tommy - would I be correct that the leadscrew you are using in that setup is 8mm with 2mm lead? Or is it 4mm lead?  Also the brass flange nut is using M3 screws to hold it to that cross section?  Just trying to guage sizes of what is being used to help ensure I don't start over engineering things for no purpose.

Cheers - James.
 

It is 8mm with 8mm lead ( i am greedy for speed ), and that proved to much so using 4mm would be better.
And yes, M3 screws holding the nut to the thin plate (use at least 2mm plate, i had one break so i preemptively changed another two using the same plate), and another M3 that has no place being there, alas it is hiding my mistake!

Thanks.  Just working out some modeling stuff.

I have a 2amp Nema17 motor that I was going to direct drive onto the leadscrew.  Given that and the motor size I have been thinking a 2mm lead so as to get the torque up.  Or am I being too conservative and 4mm lead on that sized motor will be fine?  I don't have much experience with how much oomph these smaller motors have as most of my stepper experience is with the bigger Nema32s.

Thanks - J.

I am using Nema 17 at 1A (they are 1.3 A) with 8mm lead, so it will do just fine with 4mm.
2mm might be to much depending on the speed required and the voltage used.

Thanks.   2mm lead will be easier on the motor from a load/torque perspective but might be an issue in that to get the level of travel needed to respond to changes in height as things move the motor might not be able to spin fast enough?

The other challenge will be finding a 4mm lead locally.  I want to buy NZ but I keep havingo to go offshore cose no one local seems to have stuff.  Or if they do they are charging 300-400% more than I can source it for offshore. 

update:  All motors runnig off 48V supply.

Cheers - J.

Yeah that should be more than enough voltage to drive the motors quite fast, so even 2mm should do just fine.