Movement on X axis is incorrect

[hendr1x]

Printer Model

v2.4r2

Extruder Type

Clockwork 2

Cooling Type

Stealthburner

Hello, I have a 2.4 that was running fine for a couple years. There was a bearing noise coming from the right rear so I changed all the bearings. I also swapped the steppers motors which involved putting new pulleys on it. Movement on the Y axis is perfect Now my X axis moves 97.2 when I ask for 100mm. If I move it left and right 100mm over and over it will slowly creep further right. I checked to make sure belts were same length, they are routed perfectly, the front tensioners are at exact same distance. I deracked the gantry. I confirmed the A/B steppers motors have exact same settings in klipper. Does anyone have any ideas? I'm completely stuck.

 

[argusz]

do you have some kind of printed part from before making the change? some kind of calibration cube or something would be nice, to see if you had this issue before. if you move the toolhead on x does the y also move just a little? check if both stepper pulley have the same number of teeth...

 

[hendr1x]

I printed thousands of hours without issue prior. Definitely did a full tune when the printer was first built and confirmed accuracy of calibration cubes. Now I can't even print a few layers because the print walks toward the rear back. I guess I can pull off the pulleys off and check them but both X and Y are new and came from the same bag bought on amazon "WINSINN GT2 Pulley 20 Teeth 5mm bore 6mm Width 20T Timing Belt Pulley Wheel Aluminum for 3D Printer (Pack of 5Pcs)".

Any idea how to measure the movement like you are asking? I put down a bunch of a layers of painters tape and poked the tape with the nozzle to measure the single axis movment but I don't know how to measure drift on two axis especially assuming its a small amount.

Thanks a ton for your help.

 

[argusz]

visually must be enough... you must move the tollhead by imput the values in mainsail(or whatever u are using for interfacing with the printer), not moving by hand.
the movement of the x axis(and y axis) uses both steppers. if you say the settings in printer.cfg are the same for both steppers(microstepping, rotation distance, steps per rotation....) it must be a mechanical issue. the first in my mind is different size pullies, and that means also your prints will come out skewed...
try to move the toolhead from position 0 to "your max bedsize"on x axis and look if the gantry moves in the y direction. the same goes if you make a complet move on the y axis, look if the toolhead moves.