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

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. 

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

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!

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.

RE: Self Test Error - Please check axis length Y

@michael-5

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

RE: Self Test Error - Please check axis length Y

@kevin-b60

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

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.

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.

RE: Self Test Error - Please check axis length Y

@osmosis

I do the same, and it worked!

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.

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. 

Y axis

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

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,

RE: Self Test Error - Please check axis length Y

I had same issue, turned out I had places bearings (on the side where there's two) slightly wrong. Front bearing was too far front and rear bearing too far back. That caused Y to "crash" like under 1mm from target length.

RE: Four screws

Thanks @hspter! This was exactly my problem too. The four M3 screws were not screwed in, for the two Y-rods. I don't know how I missed that step in the assembly instructions!

RE:

To second another earlier post here from JuustoMestari, I ran into this issue and after reading some other threads on this forum I started the maintenance process. Right after cleaning and lubricating the rods under the bed (along the y axis), literally the first step of the maintenance process, this issue went away as well as my 'crash detected' issues and my low belt tension values. It was just hanging up as it slid along, causing the error. Definitely the first stop for readers coming to this thread for solutions.

RE: Self Test Error - Please check axis length Y

After a year of perfect prints, I developed the same problem.  Y axis would move manually but seemed really stiff.  I lubed the y axis guide rods and, voila, it’s working perfectly. Unfortunately, I first did a factory reset and had to re-do my calibration. 

RE: Self Test Error - Please check axis length Y

What do you use to lube them and is there a procedure somewhere?  I am having this problem as well after about a year and a half.  Mine was a pre-assembled kit, so I don't really know the nuts and bolts on how it goes together, but the Y axis is failing test and if I try to move it by hand it is VERY hard to move.  I can't visually see any obstructions, though I didn't disassemble anything.

RE: Self Test Error - Please check axis length Y

Hi!

I had the same issue. Cleaning and greasing of all rods helped me 🙂