Questions tagged [lead-screw]

Leadscrews are a superior replacement to threaded rods

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3
votes
2answers
74 views

Lead screw orientation

Wouldn't it be better to mount lead screws with the motor on top and the bottom end unconstrained? Compared to the conventional way (motor on the bottom) the lead screw would be under constant tension ...
1
vote
2answers
108 views

3D Printed Lead Screw

I want to build a mini CNC machine and need some lead screws. I was wondering I can simply 3D print some. There are a few 3D models out there but I want to know if printing it in PLA+ has enough ...
7
votes
3answers
5k views

Does anyone know the thread size (pitch and lead) of the Anet A8's lead screw?

I bought a new printer, and unfortunately the left nut for the lead screw isn't tapped. Does anyone know the thread size, w.r.t. both pitch and lead, of the lead screws?
3
votes
5answers
2k views

Choice of lead for lead screw

This video brought to my attention the 8 mm lead of the Ender 3's Z axis screw, which seems like an exceedingly bad choice from a standpoint of accuracy with respect to common grid alignments in the Z ...
1
vote
1answer
211 views

When to use an anti-backlash bolt for a Z drive gear?

I am building an HEVO printer with a 300x300 build plate and the project includes two T8 lead screws, lead 8 mm ("Tr8x8(p2)"). I read that such long lead may worsen backlash issues, so anti-backlash ...
0
votes
1answer
787 views

Calculating gear ratio for leadscrew

My calibration at my printer is okay. When I try to move 10 mm, it's exactly 10 mm. But I want to know what is my precision for Z-axis. (not posting the link of the product maybe it's not ...
4
votes
1answer
2k views

Are stepper flex couplings important? How important?

TL;DR: On my particular printer design, it definitely appears the company switched from flex couplings to solid couplings on purpose to improve the printer, and to prevent well-meaning users from ...
7
votes
3answers
17k views

Would using a leadscrew with 1 or 2 mm lead, en lieu of 8 mm, result in a better printer?

By "better" I mean "more precise"... With respect to a RepRap P3Steel or Wilson II, I am getting some 330 mm T8 leadscrews for the Z-axis movement. There seems to be a choice ...
2
votes
1answer
366 views

Lead screw holder - shall I buy metal or just use a printed one?

I am on the way to building my own printer using 2020 profiles, TR8 * 500mm lead screw for the Z-axis. Still thinking if that will be a h-bot or coreXY, but this is another story. As the printing ...
5
votes
3answers
1k views

Is there a reason for the z-axis M5 drive nut to be super loose on the lead screw?

So I bought a prusa i3 kit from a company called folger tech off of ebay. I've built it and even printed out a few parts, but I noticed that a lot of noise seemed to be happening only while the x-axis ...
5
votes
1answer
138 views

Why not use GT2 en lieu of a Z-axis threaded rod or leadscrew?

Having just re-read Tom's excellent answer to my question Advantages of GT2 over a rack, as my comment ponders1: Why is a threaded rod, or lead screw, used for the Z-axis movement in a Prusa (and its ...
6
votes
3answers
720 views

Lead screws - M8 instead of M5?

I am building a Prusa i3 MK2S (Dolly). I find it very difficult to find M5 rods for the Z axis, I have an M8 lead screw with 8 mm lead, So I thought since M8 is widely available online I could ...
3
votes
1answer
217 views

What size is the lead screw

So I am fairly new to 3d Printing and have a question that is probabley stupid. I built a 3D printer kit a while back but now I want a large printer to play with. I would like to build a 300X300X400 ...
5
votes
1answer
8k views

Z axis: Stepper motor and lead screw torque calculation

I am trying to figure out some calculations regarding stepper motor and lead screw. These are the things need answer: Selection stepper motor to lift given weight? Amount of load threaded rod can ...
10
votes
4answers
4k views

Are there practical reasons to NOT use a stepper motor with lead screw for the X and or Y axes?

After a few months of printing with my Prusa Mk3 (with plans to get a second one soon), I have been wondering about making my third printer a home-built one was a larger print bed than the Mk3. One ...