Well, is it possible? Has anyone increased the size of their machine before? Where can the parts be sourced? What about the wiring?
I’ve been thinking about increasing the size of my 750mm X 750mm machine to at least big enough to give me 48" of width working space.
Maybe 60" width. But I don’t even know where to begin to find the parts for this.
I enlarged my Shapeoko2 to 750 x 1000. You probably would be better off extending your Y axis as a 1000 mm Gantry won’t provide 48 of work space.
Another option is to use OpenBuild bolt on V extrusion on regular extrusion. This does come in 1500 mm lengths.
MakerSlide 1.5m - Amber Spyglass Ltd
OpenRail Linear Rail - OpenBuilds Part Store
There are also connectors for bolting lengths of extrusion together. You can find them on Amazon
PZRT 4-Pack 2020 Series Aluminum Profile Straight Line Connector,Length 3.9 Inch Bracket Fastener with M5 Screw,for T Slot 6mm Aluminum Extrusion Profile Connect Parts
Open builds has all kinds of extrusions and wiring by the foot