I’ve been seeing an issue where the head of my printer seems to be moving the whole head slightly diaganol when moving the x axis in either direction.
I’m wondering if anyones knows why this is happening or if there is just a bolt that needs to be retightened?
Im using Lulzbot Taz workhorse.
What is attached to the gantry there as a toolhead? It looks heavy enough it may be causing some droop.
That is a definite downside to the belted Z axis, and if it is weight that’s causing the issue, the fix is to lighten the load, since I believe the Z motors are already run with reduction gears. If you can’t make it lighter, increasing the Z motor current can help it hold better, but you need to monitor heat of the steppers and drivers to avoid damage.
I believe Kevin might be referring to rotation side to side, not drooping down to the front.
This can happen if the bearings in the X carriage are loose. Remove whatever tool head you have on there and look at the X carriage. At the bottom edge there are two screws. With the printer off, slide the carriage left or right along the X axis and feel how much drag there is. There should be some drag but it shouldn’t be really hard to move. I’ve adjusted hundreds of these things and what I always did was tighten one of the screws a bit, then move it side to side again. Keep doing this, tighten, then slide, until you feel the drag suddenly get a bit higher. Then back the screw out a little bit so the drag goes back down a little. You want to tighten the screw as much as you can, to squeeze the bearing, without causing much additional drag.
Then repeat the process with the other screw on the bottom edge of the carriage. There is a third screw at the top center that can squeeze the top bearing but usually it’s already fairly tight, but you could try the same process there as well.
When done adjusting the screws, check again that there isn’t significant additional drag. If there is, you can loosen each screw a little bit until it moves more freely.
After doing this you may even be able to manually try to twist the carriage left or right and feel that it seems more solid.
