Help diagnosing tramming/twist issue

[Michael_Melancon (Mike M)]

Discussion starts here:

Pocket with a T-slot bit

I’m new here and haven’t actually built mine yet…so bear with me… Is getting the spindle perpendicular with the work surface what’s important first? Or is getting it perpendicular with the X gantry what matters? With a 3D printer, I am usually trying to get my bed(work surface) parallel with my X because there is no re-surfacing, but my understanding is that the surfacing of the spoil board will take care of making the work surface parallel to the X/perpendicular to the spindle… So prior to …

Then continued on here:

LR3 traming - X and Y direction

There’s been quite a long discussion yesterday with a few forum members in another thread here: Pocket with a T-slot bit - #23 by Fabien I’m making a dedicated thread, as I dig deeper into the problem… Short version: What are the possible ways to tram the LR3 tool in both X and Y direction For the Y axis (front to back tilt), small shims between the core and the tool mount bracket seem to do the trick Not ideal, but definitely do-able… For the X axis (left to right tilt) though, I cannotfig…