The Shop > CNC
4th axis harmonic drive build
JayMcClellan:
Here's the new 4th axis assembly I am building using a harmonic drive gearbox:
[ Invalid YouTube link ]
I just finished making the drivetrain, which I show in this video, and next I need to build the enclosure and finally machine the faceplate to fit the chuck.
I posted more details on my website at http://brainright.com/Projects/FourthAxis/.
Joules:
Jay, what 3D printer are you using.
JayMcClellan:
I have a Lulzbot Taz 4, https://www.lulzbot.com/, which has since been superseded by the Taz 5 and then Taz 6. I chose the Taz partly because of its large print volume and because it's all open-source. I upgraded the print bed to PEI (polyetherimide) like the latest Taz printers have and I've been very happy with that upgrade. Among other things I use it to make stuff for the shop like brackets, featherboards and so on. If you look closely in the video you can see the black dust hood that connects my vacuum hose to the spindle on the CNC router, and that was 3D printed too.
JayMcClellan:
I just published the Part 2 video of this 4th axis build:
PK:
Great job! And a big job too on a mill that size.
Do you have a feel for how much torque the harmonic drive is good for?
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