Hi folks,
I'm refurbing a Taig mill that had been left in disuse for a few years from its previous owner. Some light rust here and there, disassembled the Z axis last night and WD-40/Scotch-brited the ways to get most of the rust off. I'm getting everything together as per the Taig Tools video online but am a little confused about the coupler part.
The previous owner had upgraded to higher torque steppers and in the process moved to rigid couplers. I'm reading to figure out which flexible coupler to get, since apparently rigid is a big no-no. However with an aftermarket coupler, how do you set the "bearing preload"? On the factory system, a nut on the end of the lead screw is tightened to bring the shoulder of the leadscrew against the bottom of the double bearing and the dial/scale against the top bearing. The coupler then fits over the nut and couples to the unthreaded portion of the screw. It appears that an aftermarket coupler would not be able to accommodate the nut. Additionally, it looks like I would have to cut a keyway or ditch the dial entirely.
For those running aftermarket couplers, how did you deal with this?
Thanks!