# Y-axis calibration or bad alignment or ?

**URL:** <https://forum.lulzbot.com/t/y-axis-calibration-or-bad-alignment-or/4566>\
**Category:** LulzBot Mini\
**Created:** [February 8, 2017, 6:33pm UTC](https://forum.lulzbot.com/t/y-axis-calibration-or-bad-alignment-or/4566 "2017-02-08T18:33:44Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![tjehrlich2](https://avatars.discourse-cdn.com/v4/letter/t/c68b51/32.png) [@tjehrlich2](https://forum.lulzbot.com/u/tjehrlich2)\
**Post date:** [February 8, 2017, 6:33pm UTC](https://forum.lulzbot.com/t/y-axis-calibration-or-bad-alignment-or/4566/1 "2017-02-08T18:33:44Z")

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We’ve had our LulzBot Mini for over a year, been great up till now. As you can see from the photos, there seems to be an issue in the y-axis direction - front to back. Left/right seems fine. Doesn’t seem like it’s consistent on every row, just “churps” in the printing. I did take off the headed plate and made sure the screws underneath were snug, but don’t know where to go from here. Any input is greatly appreciated.

Also, the bottom 3-4 mm of the print recently are coming out looking melted and shiny, but I’m heating the plate to the recommended 100 C or whatever for HIPS. See how the model in the top photo pulled up from the base (right-hand side).

Thanks.

 ![3d2.jpg](https://us1.discourse-cdn.com/flex020/uploads/lulzbot/original/2X/e/e80d4192a8fb86cb51ff7f7af6b243a8d65cafd4.jpeg)  
 ![3d1.jpg](https://us1.discourse-cdn.com/flex020/uploads/lulzbot/original/2X/9/928c34f35025d02f5d6d584f6ebbe3a2968f62a4.jpeg)

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**Author:** ![ttabbal](https://avatars.discourse-cdn.com/v4/letter/t/db5fbb/32.png) [@ttabbal](https://forum.lulzbot.com/u/ttabbal)\
**Post date:** [February 9, 2017, 6:33pm UTC](https://forum.lulzbot.com/t/y-axis-calibration-or-bad-alignment-or/4566/2 "2017-02-09T18:33:00Z")

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Have you checked the pulley on the Y stepper? If it slips a little, it could do that. Belt tension being a little loose might do it too…