Hello I am lupus from Austria ( NO Kangaroos) and for quite some time I am into 3d printing.
Lately I build myself a second delta printer, a mini kossel and at first everything seemed to be ok.
But after pretty much finishing my build I encountered that the Y axis stepper motor is moving loud and with a lot of vibration.
I looked all over the net for a solution for my Problem, I tried lowering and rising the current on the populu A4988 driver, I changed the whole driver board, I changed the cable, I even swapped the extruder stepper ( all steppers are Nena 17 ) with the Y axis stepper with still the same result. I took a look on the ramps board I use and found some poorly soldered spots so I re soldered the whole board by hand. still exactly the same. Z and Y are working flawless only X is behaving out of my understanding. I swapped every possible part but it is still doing its thing.
printing works but the movement of Y sounds like something is breaking any moment.
After changing everything how is it still able to not work properly
Could it be that I messed up the firmware? But wouldnt it result in the same problem with X and Z axis as well as they all have to have the same values?
please help.
And your sure you checked the bearings? Both linear and roller for belt tensioner? Alignment of smooth rods/guide rail? (Including the upper and lower ends where it meets eith base or top?) Both pivot points of the Y axis on guide side and end effector side? Has full free movement when moving by hand? I would lean more towards an alignment issue of some type. Sounds like it’s binding under load. Also make sure you wire pairs for the stepper motors are good as well. At times one can run into an issue that is not overlooked at first but is overlooked afterwards. This is 60% of the time. Other times it’s just something I missed Like a decimal point in the wrong place, a space between a number. Good luck.
Also check your Drivers, are the values set high enough. If not the motors will chatter, if they encounter any resistance.
I’m pretty sure you are missing some bearing balls in your linear carriage.
You should also check whether you have set the correct microsteps setting. A wild guess perhaps, but it is possible that you use low micro stepping on the ramps board (via the 3 jumpers under the driver), and/or in your firmware for y axis (via steps per mm). That could explain the noise and vibration.
Since its a delta and you use A4988 drivers, you should use the maximum 1/16 microstepping.
Check that all 3 jumpers under the stepper driver for y axis are connected, and that the steps per mm in your firmware are set correctly.
Hope this helps.
Thanks for the answers guys, but it was the drivers, I had those green pcb board 4988 drivers from china, I swapped them with the red ones also from china and now it works flawless 
When you stated above the a4988, The red ones are also a4988. Sounds like maybe you just need to adjust potentiometer on the driver. Use multimeter to measure 0-2 volts dc, the positive on the potentiometer screw, black negative lead on gnd pin. 0.8 is what most run. I’m not shy about sound as I want the most torque so I personally run 1.0 for X and Y and 1.1 for z and e The voltage is a reference to how much current is being fed to the stepper motor. I would ha e said this as well but you stated that you had swapped stepper drivers around and motor and other things. I should have asked did you check the current feeding the stepper motors via the voltage ref.
yep. you are right, the green ones cause the jitter… red ones solve the problem.
