CNC Carriage Complete
I completed the UHMW carriage on the CNC machine this weekend. The runners for the rails are done and mounted, and the driver-nut for the lead screw has been made and installed. I also ordered a 1/4" coupler from Reid Tool to attach the lead screw to the stepper-motor. Once the coupler is installed, everything underneath the carriage will be done. I tried to connect the lead screw to the stepper-motor using heat-shrink tubing as suggested by John K, but did not like the flexibility that remained in the joint…so I ordered the metal coupler with two set screws instead.
Discovered that the UHMW does not need to be tapped to allow for use of machine screws as was recommended in the plan. The UHMW can be self-threaded by the screws themselves (into pilot holes) during construction….a major time-saver.
Next step will be the construction of the mechanism that rides on top of the carriage (i.e, the cutter-head and second stepper motor).