Hi, Will there be much backlash in the leadscrew nut available from the openbuilds store, compared to an anti-backlash leadscrew nut? http://openbuildspartstore.com/nut-block-for-8mm-metric-acme-lead-screw/ Thanks
Hello Adam, Hard to answer your question, how precise do you want it to be? I can tell that you can feel the play it has if you use one nut-block, with 2 nut-blocks the play is almost gone when installed right. When using the Acme in a CNC setup you won't see much of the precision loss. How much backlash does your design accept? -Ronald
I will be using the leadscrews for a 3d printer, I wanted to try to use the leadscrews for the x/y axis compared to the typical belt driven way to see if it would be any more precise. Would using two nut blocks tensioned properly be the best way?
Personally I would like to see something different than a belt-drive for a 3D printer but I believe that you are better of using a belt and just NEMA17 motors; there are only disadvantages by using an Acme over a belt-drive in this case. But yes, if one must use an Acme system then it would be wise to use 2 blocks instead of one; I've been thinking about making one springloaded (adjustable) but it's still in my head and not on "paper". -Ronald
Can we talk about leadscrew vs belt drive a bit more? I'm expecting the leadscrew to be slower, and backlash is a problem compared with belt drive. However, done properly shouldn't a leadscrew be able to achieve better precision than belt drive? As an aside, what exactly does acme mean for an acme leadscrew?
Here is a good read on belts vs. leads http://www.cnc4everyone.com/hardware/linear-drives/ Some others to check out as well. https://www.physicsforums.com/threa...ming-belt-getting-really-high-numbers.612801/ http://forums.reprap.org/read.php?1,36928 Good question on the ACME I think it comes down to the common profile used in place of the square toothed profile that proceeded it. More info here: https://en.wikipedia.org/wiki/Trapezoidal_thread_forms Hope this helps
