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[Solved] Self Test Error - Please check axis length Y  

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darryl.n
(@darryl-n)
New Member
Self Test Error - Please check axis length Y

So yesterday, I tried printing something in PLA which obviously was too thin and detatched from the bed leaving behind loads of plastic to clear up. After clean up I adjusted the print and tried again.  During the leveling test, the bed banged at the the back of the printer, then came forward and banged around.  I stopped the print and ran the self test and then got the 'Please check axis length' on Y error.

I took the hot bed off to check for anything I missed and could see nothing. No wire or bits of left over plastic blocking anything.  I can go into Settings and manually play with the Y axis and make it smoothly go from front to back to front again.
The only things I have found were the rear bearing was loose and a bolt on the pully that connects to the motor was also loose.  Everything seems fine, just will not complete the test.

PLEASE HELP!!!

Posted : 29/09/2019 11:17 am
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(@)
Illustrious Member
RE: Self Test Error - Please check axis length Y

Try doing an AutoHome then try the test again.

The Y bearings need to be held snug with the U-bolts, but not tight.  If too tight the bearing drag can cause Y crashes (motor stalls); and these will cause a fail. 

And the Y belt drive gear should be attached using the flat first method: fully loosen both set screws, carefully align then tighten the set screw on the flat of the motor shaft; and then tighten the jam set screw.  To adjust the gear, first loosen the jam screw, then the flat set screw or you risk stripping out the hex. 

 

Posted : 29/09/2019 7:51 pm
darryl.n
(@darryl-n)
New Member
Topic starter answered:
RE: Self Test Error - Please check axis length Y

Well good news!  Im fixed

I checked the auto home and still same problem. Checked the 3 bearing and tightened just enough so I could no longer move with my finger.

I took the Y belt gear off and thats when I found my problem.  Some of the plastic had wrapped itself around the gear making the belt slip ( i guess).  Once everything was put back together, Y axis configured fine.

Thanks for your advice

Posted : 30/09/2019 3:11 pm
takanotume24
(@takanotume24)
New Member
RE: Self Test Error - Please check axis length Y

Hi, I was having the same problem with the same error, but I solved it by checking the hardware.
In my case, the screw that connects the motor and the gear of Y-axis was loose, so I tightened it with a hexagonal screwdriver. Then the self test can be passed.
Thank you!

Posted : 21/09/2020 3:51 pm
michael-5
(@michael-5)
New Member
RE: Self Test Error - Please check axis length Y

I started experiencing the self test error yesterday.  The belt test passed the x axis test but as soon as it tried to move along the y axis it failed.

I tried moving the platform manually and found that it would move then stick. If I pushed through the sticking, it would move again for a bit and stick again.  I then loosened the pulley set screws so the motor wasn't involved and the platform rolled smoothly.  

Not sure what to do at this point.  I tried contacting tech support but Chrome wouldn't do anything when I clicked on the tech support button.

Posted : 23/09/2020 5:05 pm
osmosis
(@osmosis)
Active Member
RE: Self Test Error - Please check axis length Y

@michael-5

I am having this exact same problem.  Have you found a resolution?

Posted : 31/10/2020 1:09 am
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(@)
Illustrious Member
RE: Self Test Error - Please check axis length Y

@kevin-b60

There are a few problems listed above. Which one are you having?

Posted : 31/10/2020 3:59 am
osmosis
(@osmosis)
Active Member
RE: Self Test Error - Please check axis length Y

I had the y-axes problem.  I found my solution.  I had a y-belt of 237, so I had the bearing too tight.  I loosened them up and realigned the pully.  That fixed my problem.

Posted : 01/11/2020 12:45 am
JuustoMestari
(@juustomestari)
New Member
RE: Self Test Error - Please check axis length Y

I had the same issue today. It turns out I just had to grease the y axis rods.

Posted : 09/01/2021 11:15 am
PauloSouza
(@paulosouza)
New Member
RE: Self Test Error - Please check axis length Y

@osmosis

I do the same, and it worked!

...
Posted : 28/01/2021 12:51 pm
Brian
(@brian)
New Member
RE: Self Test Error - Please check axis length Y

I have just finished assembly.  First 3D printer, and nothing to compare to.  Got through all the self checks first time through.  I was doing the "Z" adjustment, and now I continually get Y axis failures.  Also seems to have lost "home".   Checked belt, zip ties... no mechanical issues I can tell.  One thing since the beginning, is that the Y axis moves in "spurts" when moved by hand - seems like magnetic resistance at points.  Moving it with the control panel and during the initial testing, it ran fine.  

When running the belt test, the bed moves about 2" both ways, then stops and throws a fail - Axis Y error.

Any help is appreciated.

Posted : 25/06/2021 2:32 am
hspter
(@hspter)
New Member
RE: Self Test Error - Please check axis length Y

I ran into this, and it ended up being because I hadn't tightened the screws that housed the rods. So the M3 screw head was sticking out, and the ybed frame was hitting it when moving back and forth. 

Posted : 26/08/2021 10:17 pm
robertirani
(@robertirani)
New Member
Y axis

Thank you, this tip worked for me, grabbed some spray oil that we use for cooking and I’m back in business 😉

Posted : 10/09/2021 9:33 am
Diem
 Diem
(@diem)
Noble Member

Oops!  Cooking oil will oxidise and turn to sticky gunk in a little while... Better to clean it off and replace with mineral oil.

Cheerio,

Posted : 10/09/2021 3:39 pm
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