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.
Type: Posts; User: 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.
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...
Incidentally... Those are from the Prusa i3 open source. I had a problem where my clamps kept cracking and falling off. So I scaled the clamp to different sizes so I could try different ones...
When you say 'Plastic Couplers' do you mean short pieces of vinyl tubing? If so, I use the attached clamps.
That picture was only to help communicate my concern about the one you showed. I suspect if the coupler doesn't flex, certain parts of the motor's rotation are going to be very very difficult.
The problem is, you need to have a little bit of flex in the coupling. I think that is why a lot of people use the vinyl. The metal couplings I've seen have those slits that go pretty deep into...