DropLit Assembly Guide
Take the last M5 nut and thread it on to the Z-Axis rod till it's about an inch from the end. This
nut is going to act as a “jam” nut – it will prevent the Z-Axis rod from backing out of the shaft coupler
once it's installed.
Now raise up the carriage until the Z-Axis rod
comes into contact with the threaded coupler on the
stepper motor. Hold the carriage in place with one hand as
you rotate the threaded coupler, clockwise. After a turn or
so, the threads in the coupler should pick up the rod. Keep
turning until the rod has gone into the coupler as far as it
can.
Once you've done that, spin the M5 nut
up until it comes in contact with the bottom face
of the threaded coupler. Using a pair of slip joint
pliers and a 5/16” wrench, tighten the M5 nut
against the face of the threaded coupler as shown
below.
52
Fig. 5-45: Jam nut threaded on.
Fig. 5-46: Mating to the threaded coupler.
Fig. 5-47: Tightening the Jam nut.
Fig. 5-48: DONE!
