Acme Vs. Threaded Rod Hi, I'm building a repstrap soon and I found some cheap threaded rod at the hardware store that seems to have very little back lash when combined with the matching nut and seems to be quite straight. I was wondering if you guys thing it's worth it to start with that as my lead screws or should I invest in some good Acme threaded rods right off the bat. My goal is to have accuracy within a millimeter for my prints. https://reprap.org/forum/read.php?14,52365,52365#msg-52365 Tue, 14 Apr 2026 05:18:44 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?14,52365,52494#msg-52494 Re: Acme Vs. Threaded Rod https://reprap.org/forum/read.php?14,52365,52494#msg-52494
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SebastienBailard
The M5 rod in WolfStrap seems to be enough to get these results:

Small correction: For the two fast axes, Wolfgang had M10 rods, just for the higher pitch:

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Wiki page
Threaded rod 2x approximately 350mm M10; X-Y-axis (I started out with M5s, which I cannot recommend. The machine will move too slow)
]]> Traumflug Mechanics Thu, 22 Jul 2010 06:34:10 -0400 https://reprap.org/forum/read.php?14,52365,52480#msg-52480 Re: Acme Vs. Threaded Rod https://reprap.org/forum/read.php?14,52365,52480#msg-52480 [forums.reprap.org]
[reprap.org]

But you may want to try a toothed-belt WolfStrap
[reprap.org]]]> SebastienBailard Mechanics Thu, 22 Jul 2010 01:32:33 -0400 https://reprap.org/forum/read.php?14,52365,52402#msg-52402 Re: Acme Vs. Threaded Rod https://reprap.org/forum/read.php?14,52365,52402#msg-52402


Made from brass, they pair nicely with a steel rod for a good bearing combination. Probably there are more examples of brass pieces with an extra-long thread.

And yes, threaded rods are precise, but not the fastest. With standard firmware, you don't have acceleration ramps and can expect about 600 turns/min for the usual steppers. Acceleration ramping will extend this to about double the speed. Multiply this with your thread's pitch to get speed numbers.

Typical Mendels run between 10 mm/s and 50 mm/s, according to some posts in this forum.

Keep in mind filament extruding machines require a lot of "mileage", a lot more than milling. For getting started or extra-precise requirements, rods should be fine, though.
]]> Traumflug Mechanics Wed, 21 Jul 2010 05:36:47 -0400 https://reprap.org/forum/read.php?14,52365,52369#msg-52369 Re: Acme Vs. Threaded Rod https://reprap.org/forum/read.php?14,52365,52369#msg-52369 Wade Mechanics Wed, 21 Jul 2010 01:32:42 -0400 https://reprap.org/forum/read.php?14,52365,52365#msg-52365 Acme Vs. Threaded Rod https://reprap.org/forum/read.php?14,52365,52365#msg-52365 Anonymous User Mechanics Tue, 20 Jul 2010 23:57:24 -0400