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 https://web.archive.org/web/20160430202331/https://bbs.homeshopmachinist.net/threads/26578-Bronze-sleeves-in-a-S-B-9-quot-headstock
Why bronze plain bearings mustn't be round - Lathe bearing design.
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
surface plate[]
https://www.cnczone.com/forums/cnc-do-it-yourself-/465270-machinist-posts.html Piotr fox , form user with details on building surface plate.
homemodelenginemachinist[]
https://www.homemodelenginemachinist.com/
Links[]
Lathe
Machine design
Shimming, https://www.cnczone.com/forums/vertical-mill-lathe-project-log/96410-cnc-forum.html or https://archive.ph/AGyjG backup. "test fit" shims of various thicknesses under the end that is down and check perpendicularity with a square off the granite plate. I keep moving the shims around, and using different thicknesses and checking with the square both off the main flat surface and my reference side surface. After the end is square I note the positions of the shims with a marker. Uses JBWELD
https://www.cnczone.com/forums/diy-cnc-router-table-machines/
https://www.model-engineer.co.uk/forums/postings.asp?th=176240
https://www.homemodelenginemachinist.com/
https://www.practicalmachinist.com/vb/general/lathe-gibbs-make-buy-206251/ I'd go for an epoxy concrete bed with inserts to fix your rails to and also insert sat the side to take the gantry supports. maybe even fill your gantry and it's supports with the stuff as it all helps damp vibration