# Really bad Z Wobble in X axis **URL:** \ **Category:** Hardware\ **Created:** [March 15, 2019, 9:56pm UTC](https://forum.lulzbot.com/t/really-bad-z-wobble-in-x-axis/6590 "2019-03-15T21:56:40Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![jimbalny](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.lulzbot.com/jimbalny/32/9837_2.png) [@jimbalny](https://forum.lulzbot.com/u/jimbalny)\ **Post date:** [March 15, 2019, 9:56pm UTC](https://forum.lulzbot.com/t/really-bad-z-wobble-in-x-axis/6590/1 "2019-03-15T21:56:40Z")
![zwobble2.jpg](https://us1.discourse-cdn.com/flex020/uploads/lulzbot/original/2X/1/19df79d216a0349f5d63f20c4ceb9e683f7b219e.jpeg) ![zwobble1.jpg](https://us1.discourse-cdn.com/flex020/uploads/lulzbot/original/2X/f/f7d929a5c27e262835663586a098d2d54f9b8ced.jpeg) After printing replacement parts and doing maintenance on my Taz 5 like new belts, new precision igus bearings and holders on the X and Y axis, I’m still having issues with layer shifting in the x axis on the first 40-50mm of Z height pictured above. I did a test and measured from the edge of the aluminium x axis plate to the 2020 extrusion while moving the Z axis up and down and it does seem to shift around 0.5 mm. I also tried lowering acceleration, jerk and print speed and still see these artifacts albeit a tiny bit less pronounced? The effect doesn’t happen at all in the Y axis which is very strange, I’ve looked back to prints I made before touching anything on the machine and the artifacts are visible in prints before I touched anything recently however they don’t seem to be visible in prints that I made shortly after purchasing the machine. I’m wondering if anyone has had a similar issue and what the fix is. I’ve gotten so much great use out of this my first and only 3d printer I’ve had since 2015, hoping I can get this issue fixed so I can confidently print great parts for myself and my customers in every axis. ![mytaz5.jpg](https://us1.discourse-cdn.com/flex020/uploads/lulzbot/original/2X/e/ecc1f94c07e2d375ab1801fd3af0e94829e4454a.jpeg) Thanks in advance for reading and replying! ---
**Author:** ![kcchen\_00](https://avatars.discourse-cdn.com/v4/letter/k/9dc877/32.png) [@kcchen\_00](https://forum.lulzbot.com/u/kcchen_00)\ **Post date:** [March 16, 2019, 5:23am UTC](https://forum.lulzbot.com/t/really-bad-z-wobble-in-x-axis/6590/2 "2019-03-16T05:23:49Z")
I’ve had similar issues with my Y-axis and it turned out to be the belt holders under the aluminum bed were loose. Causing a similar shift. Also check that the toolhead is seated properly on the X-carriage and its not wobbling/shifting. ---
**Author:** ![jimbalny](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.lulzbot.com/jimbalny/32/9837_2.png) [@jimbalny](https://forum.lulzbot.com/u/jimbalny)\ **Post date:** [March 16, 2019, 3:22pm UTC](https://forum.lulzbot.com/t/really-bad-z-wobble-in-x-axis/6590/3 "2019-03-16T15:22:09Z")
The shifting only happens in the X axis. I recently did some maintenance to try and remedy the issue which included taking the bed assembly apart, changing belts, anything I could think of and still it happens identically on every print. I also printed the strengthened extruder assembly, changed igus bushings in the x and y axis, replaced the X axis 16 tooth pulley. My next step will be to take apart the Z lead screw and re-seat everything. If it’s not z wobble then maybe it has something to do with instability in the frame? Ordered some 2020 extrusions to put in piercet’s awesome back brace project figured it can’t hurt. ---
**Author:** ![kcchen\_00](https://avatars.discourse-cdn.com/v4/letter/k/9dc877/32.png) [@kcchen\_00](https://forum.lulzbot.com/u/kcchen_00)\ **Post date:** [March 17, 2019, 5:28pm UTC](https://forum.lulzbot.com/t/really-bad-z-wobble-in-x-axis/6590/4 "2019-03-17T17:28:08Z")
Z-wobble typically produces a pattern due to the bend in the lead screws. What I see in the pictures is a shift in the print. Does it happen on all prints at the same height or is it random heights? ---
**Author:** ![jimbalny](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.lulzbot.com/jimbalny/32/9837_2.png) [@jimbalny](https://forum.lulzbot.com/u/jimbalny)\ **Post date:** [March 18, 2019, 9:50pm UTC](https://forum.lulzbot.com/t/really-bad-z-wobble-in-x-axis/6590/5 "2019-03-18T21:50:59Z")
Figured it out, wasn’t something I expected… must have tightened the smooth rods on the x carriage while it was higher up, when I loosened the grub screws it released some pressure against it so I should have leveled before tightening the screws. I feel silly but glad it was a simple fix