Makerfarm & Z motor coupling

[Roxy]

Well, its not like the coupler flexes very much. But if it doesn't flex, the motor shaft and the Z-Threaded_Shaft have to be ---PERFECTLY--- aligned. And you never can do that. If you put that solid metal coupler in place, when you turn the Z Axis, you will feel spots that are very difficult to turn. And that is because the threaded rod has to bend because the coupler isn't flexing.

[old man emu]

Why would the threaded rod have to bend? My rods are operating quite well.

OME

[Roxy]

Because the Z Motor shafts may not be --PERFECTLY-- aligned with the Z Axis threaded rods. If there is any misalignment, something has to give as the motor turns.

[clough42]

I'm using the standard spiral cut aluminum couplers commonly available on eBay for my i3v and they fit fine. They do sing a little, so I buried the threaded rod in the coupler so it actually contacts the motor shaft. This stopped the lovely ringing noises.

[printbus]

Clough42, welcome to the 3dprintboard. Thanks for all the great stuff you're posting for the i3v on Thingiverse!

[clough42]

You're welcome. I have mostly just been trying to solve the issues I have encountered and thought others might find them useful as well. I've been getting a lot of private questions on Thingiverse, and I've been thinking about trying to get some threads started over here so others can benefit (and contribute).