# Something to check - Y axis zeroed on both sides equally

**URL:** <https://forum.sienci.com/t/something-to-check-y-axis-zeroed-on-both-sides-equally/1061>\
**Category:** 📄 General\
**Created:** [June 15, 2020, 5:41pm UTC](https://forum.sienci.com/t/something-to-check-y-axis-zeroed-on-both-sides-equally/1061 "2020-06-15T17:41:49Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![jwoody18](https://forum.sienci.com/letter_avatar_proxy/v4/letter/j/4bbf92/32.png) [@jwoody18](https://forum.sienci.com/u/jwoody18)\
**Post date:** [June 15, 2020, 5:41pm UTC](https://forum.sienci.com/t/something-to-check-y-axis-zeroed-on-both-sides-equally/1061/1 "2020-06-15T17:41:49Z")

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My Longmill has been working well but I was always getting a bit of whining from what I think was the right Y rail/wheel when I jogged the machine from front to back. A few weeks ago I removed the screws in the feet and ran it back and forth to try and improve parallel with the other axis. I screwed it back down and did notice an improvement but I still had a particular spot where it was whining quite a bit, especially a jog speeds over 3000mm/min.

Over the weekend, when playing with my homing sensors, I was looking closely at both Y axis. After a homing cycle I noticed the left gantry plate was in full contact with the rear foot but the right one was maybe 1mm off the foot, indicating I was very slightly out of parallel left to right. I corrected the issue and noticed the machine is much quieter when jogging all the way forward and back now. Still a spot where it whines a bit but definitely an improvement.

I don’t know how long that was out, I believed I had checked it before during setup. It was such a small variation I almost didn’t notice it, but I did notice the improvement when it was corrected. 🙂 Hopefully that helps the next person.

-Jeff

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**Author:** ![chrismakesstuff](https://forum.sienci.com/user_avatar/forum.sienci.com/chrismakesstuff/32/10759_2.png) [@chrismakesstuff](https://forum.sienci.com/u/chrismakesstuff)\
**Post date:** [June 16, 2020, 1:38am UTC](https://forum.sienci.com/t/something-to-check-y-axis-zeroed-on-both-sides-equally/1061/2 "2020-06-16T01:38:39Z")

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Glad you caught this Jeff 👍 great message to help out others if they decide to set up their own limit switch setup

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**Author:** ![Helix05](https://forum.sienci.com/letter_avatar_proxy/v4/letter/h/a8b319/32.png) [@Helix05](https://forum.sienci.com/u/Helix05)\
**Post date:** [June 16, 2020, 2:36am UTC](https://forum.sienci.com/t/something-to-check-y-axis-zeroed-on-both-sides-equally/1061/3 "2020-06-16T02:36:34Z")

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Hello. I’ve also had this issue. I also, discovered another potential problem. After adjusting rails’ wheels on both sides I run my machine to the most front Y position. I have noticed that the right gantry plate was in full contact with the front right foot, whereas left gantry has 1 mm gap. The gap was possible because front left gantry wheel stack out and touched the front left foot first than the left gantry plate. I have not solve this problem yet, but will try to resolve it by tension the wheels prioritizing the front left wheel.  
Thank you.