Guess its time for an update and stop clogging up others threads lol. So I’ve fixed a few things…
When I put the new core on I messed up the belts. The belt for the left motor (upper belt) I had too short. This was causing me to have to run the Left/lower belt WAY tighter than it should be. So I took that off and swapped in a new belt making sure to leave just a little room for adjustment. While I had the belt tension loose I slid the X rail all the way back, loosened the 4 screws holding the rail to the y carriage and pushed everything straight and retightened it. Before it was way out of whack, this time it is MUCH better. I have tried to do that before but never with the belts completely off and that made a world of difference. After that I put the belts back and tensioned them. Left them looser than I ever have before. beam is square and no teeth skipping in the pulleys so we are good.
After that I ran the Ellis tuning accelerations test suggested by @Lithium366. Before now I’ve always had to keep accelerations capped at 1000 or I would start skipping steps. Well after getting even more straight and square, this time without having the left belt pull the beam square, I was able to pass the test at 3k accelerations no problem. But I knew I should have been able to hit more. I went into my printer.cfg and my current was set to .680 amps on the X&Y motors. So I bumped that up to .850 amps. Went back and ran the test again, held at 5k, skipped at 6k. So I bumped it up to .950 amps. Held good at 6K skipped at 7k. I thought about bumping it a little more but honestly I was beyond happy with that result. Up to this point all my test had been 2 iterations. So in the guide it tells you once you find where its not skipping anymore to back down just a little and run a 50 iteration test. So I ran that at 5000 acceleration and did not lose a single step. Man is this thing moving at that speed lol. I set my max_accel to 4500 and max_velocity to 500. And in orca slicer I bumped the normal print accel to 3500. just going from 1000 to 3500 knocked 2 hrs off of a 9hr print! That’s just crazy. I knew it helped but never realized it was that much! I need to run this acceleration test on my other printers LOL.
Also did some bed drop test you can see here…
and here…
These springs will defiantly help with the bed drops. I just have to figure out how to get them installed out of the way of everything.