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gordonendersby
Ive been looking at lead screws recently.
Is the fine 1.5mm pitch desireable over the 2mm pitch screws?

After using 8mm x 1.25mm stainless threaded rod which has turned out to be pretty good with very regular cut threads.
Im wondering how good in comparison 8mm x2mm pitch lead screw would be.

1.5mm doesnt seem as easy to get hold of but loads of 8mm x 2mm pitch.

Gordon

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dc42

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DatRoboticsGuy
Does it matter whether I get a left hand or right hand leadscrew? Which is easiest to implement with most firmware versions?

It makes no difference - it is easy to reverse the direction in some (probably most) firmwares, or you can just plug the motor connector into the electronics the opposite way round to reverse the direction.

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DatRoboticsGuy
Does it matter whether I get a left hand or right hand leadscrew? Which is easiest to implement with most firmware versions?

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gordonendersby
Ive been looking at lead screws recently.
Is the fine 1.5mm pitch desireable over the 2mm pitch screws?

After using 8mm x 1.25mm stainless threaded rod which has turned out to be pretty good with very regular cut threads.
Im wondering how good in comparison 8mm x2mm pitch lead screw would be.

1.5mm doesnt seem as easy to get hold of but loads of 8mm x 2mm pitch.

Gordon

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DatRoboticsGuy
I was not aware of this. Thank you!

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DatRoboticsGuy
Yeah, I've checked on Ultimaker before and was unable to find anything. I just checked on Tinkerine and it was the same story. I suppose I could contact them and ask, but there is no guarantees with that, and it'll probably take a while and I can gather more (probably better informed) opinions from here!(:P)

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DatRoboticsGuy
Hello Fellow RepRappers,

I am in the process of designing and building my own custom 3D printer, and I have run into a bit of a road block when it comes to finding a Z-axis leadscrew. I have spent several days researching and searching for a good leadscrew, and I have a pretty good idea of what I want, but every time I find something close, I notice the specs are missing or ambiguous or something is not quite right. What I really need is people with more experience than me with 3D printing leadscrews to point me in a good direction of where to go. I am building a Cartesian bot, so I only need a single leadscrew. Any links to lead screws you have used or websites that sell good leadscrews and are easy to purchase from without having to make a custom order or call into would be awesome!

What I Think I want:

- A leadscrew, not a threaded rod!
- Stainless Steel, although I'm not completely sure which alloy is the best.

What I'm Not Sure About, But Need to Know Before Continuing:


-The thickness or "M" class of the threaded Rod. Is M8 fine? I plan on having a large build area, with a metal build plate, and there will be two 12mm smooth rods to take the weight of the whole platform, but will the rod need to be equally as thick? Will it experience a large load?
-I'm not sure where to go on the pitch of the rod. I'm pretty sure I want a rod with a pitch that is no more than 3mm, so with a Nema 17 and 1/8 microstepping I could get tolerances of .001 in. or .02 mm, or 200 microns. Is that reasonable? I see a lot of leadscrews on the market with an 8mm pitch, and that seems really large, is that too big? Should I go smaller than 3mm?
-Are the integrated Nema 17 Steppers/leadscrews any good? Is it worth it? I see, such as here, a stepper/leadscrew combo but it has both "threaded rod" and "leadscrew" in the name which are completely separate things. What's up with that?

It's a lot of questions, but this problem has been really bottlenecking me over the past couple days, and I haven't been able to get past it. Once again, any links and help would be, and is, greatly appreciated.

Thank You Very Much!