The original Shapeoko design called for a single belt to drive the ‘Y’ axis. In Shapeoko terms, Y is the axis that the Gantry rides along. That’s fine with a short axis, but when you grow it an extra meter or so, you need a dual belt drive.
We use a rather hefty Nema 23 with around 250oz/in of torque, so dual motors seems a little silly. To solve this, we’re adding a shaft drive. Each end of the shaft will be mounted using a press fit bearing and plate.
This week, we fabbed up some motor spacers. These were cut down to 2″ on our mini lathe, center drilled and tapped for M5 hardware. The Lathe makes it easy to ensure that the ends are square and that the tapped holes are actually centered.
You can also see the shaft that’s being built to drive the dual belt system. Next up: bearing plates!