Hi all, I have a taz workhorse that I’ve been trying to get consistent quality out of, but really struggling. I think the primary issue is sagging of the x gantry. I got the printer second hand with a duet wifi upgrade. I have since rebuilt the z and x axes and replaced all of the bushings on the printer, and I got a lulzbot magnetic flex plate upgrade. I use a TH3D EZ ABL for bed leveling, and no matter how much I’ve tried to get consistent first layers with software/config tuning, my first layers are so radically inconsistent. One thing I have noticed is that my heightmaps after probing have a “saddle” shape, and after some research, the common consensus is that this is caused (often) by a sagging x gantry.
I’ve always been very wary of the lulzbot toolheads because they are just so massive and cantilevered so far away from the actual rails.
I’ve seen a number of folks mention upgrading to 12mm rails as a fix, but the workhorse already has 12mm rails - is there any other troubleshooting I can do to try and address this sag or to confirm it is in fact sag of the x gantry?