Homing between jobs -- Y coordinate changed

[WillAdams (William Adams (Carbide 3D))]

Things which I find help Y-axis precision on a belt-drive machine:

• pull the gantry tight against the font endplates before powering up
• ensure pulleys are secure on motor shafts (put a witness mark on the ends to keep an eye on this)
• getting Y-axis belt-tension as equal as possible
• calibrating for belt stretch

Calibrating the machines over long distances

The typical technique for machine calibration: https://my.carbide3d.com/faq/belt-stretch/ depends on precision measuring tools, and is limited by the reach of the tools in question. EDIT: It also depends on access to the MDI — if using Carbide Motion v6 it will be necessary to enable this in Settings | Options: [image] It should be possible to cut strips from a suitable blank of material, one along each axis — so we set up a square file which matches an available blank of material: [ima…