Just got around to getting the bed and waste board done. I built a tramming apparatus out of a short piece of aluminum T Track. Anyways, my tramming from side to side is off slightly. I looked over the instructions and sienci provides two eccentrics for this problem if you have it. Either way, the instructions have you just replace the upper left shoulder bolt with an eccentric and 6 by 25 button head bolt. That is fine but the eccentric wont move the spindle mount unless I remove the right hand shoulder bolt too. Im thinking I might need to use both eccentrics and just not use the shoulder bolts. Anyone run into this and if so what did you do?
Just ran across this post. Complete instructions for squaring and tramming the Altmill can be found in Altmill resource section on website. Scroll down in the left column to the Handbook section. That section was posted there in November 2025. Hope that helps!
I tried to tram the altmill 4x4 today and I was not able to adjust the gantry enough to get it corrected even after adding the bussing in the top right corner on the right side of the gantry.