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Self Test of the X axis  

Active Member
Self Test of the X axis

I am having an issue doing a self test.  I have been printing good since I bought it and put it together myself.  I haven't used it in about six months and when I went to print, it was not calibrated correctly.  I did a self test and the fans are fine, when it goes to do the X axis it moves from the left to the right, it seems to have a very slight hesitation right when it gets to the exact middle of the frame, goes to the end of the right and then all the way back to the left side with no hesitation and gives me an error.

One suggestion that I saw was that maybe the rods needed to be lubricated, so I ended up cleaning the rods and relubricating them but it still has the same error and the same slight hesitation when moving from the left to the right.  

Any help would be great.

Thank you.

Posted : 06/04/2021 12:58 pm
Honorable Member
RE: Self Test of the X axis

I would check your belt tension, you should be able to gently squeeze the top and bottom half of the X belt together between your thumb and forefinger. (Dont press too hard, you could break something)

If the belt is far too loose it will sag under its own weight.  If it is too tight will barely be able to presss the 2 sides together.

Also check the grub screws onto the x motor pulley are tightened correctly with 1 on the flat on the motor shaft.  Check the idler pulley on the other side is smooth and not binding.

The chances are the bearings have dried out if the mc has been lying unused, particularily if you did not pack them with grease during the build, because the linear bearings have rubber seals on either end it can be difficult to get lubricant inside, so keep applying a light coating of grease/oil on the shafts and they should start to eventually free up.  Move the carriage very slowly back and forth with the machine off, you should feel the tight spot, and when it starts to free up with lubrication

There is a document that can help

Other option is to strip the x axis and pack the bearings witb grease, but see how you go with the above first.

Tank you very much!

Posted : 06/04/2021 2:43 pm