Forum cnczone.com

Cnc and 3d y-axis
http://www.cnczone.com/forums/linear-and-rotary-motion/120776-cnc.html

Single motor on y axis eliminates the need for two matching steppers. Allows one to use powerful recycled nema34 steppers.

uploader S_H_J
http://www.cnczone.com/forums/vertical-mill-lathe-project-log/40584-cnc-21.html links to http://bbs.homeshopmachinist.net/threads/26578-Bronze-sleeves-in-a-S-B-9-quot-headstock

https://www.3dcadforums.com/threads/3971-simple-question-where-exactly-is-transparency-feature-in-SW

https://www.cnccookbook.com/tramming-milling-machine-tool-indicator/

http://www.practicalmachinist.com/vb/

fixed gantry
BTW, anytime you have to go through a box section with bolts it's better to drill much bigger through both sides and insert a solid spacer welding in both sides from outside, then drilling and tapping for the bolts, otherwise the box section will crush as soon as you apply a load and getting spacers down the tube is well nigh inpossible unless you anticipate the need and weld them in before the base freme is welded up. https://www.cnczone.com/forums/diy-cnc-router-table-machines/164353-fixed-gantry-cnc-build-log-2.html fixed gantry out of steel

Links
Lathe

https://www.cnczone.com/forums/diy-cnc-router-table-machines/

https://www.homemodelenginemachinist.com/