[Solved] X Axis bel mystery  

X Axis bel mystery

Hi

i've a strange problem.

kit mounted 2 weeks ago, first print, perfect.

after 1 week, strange noise on x axis.. checked belt tension with prusa calibration... x was 210... too tight for the software but not for my fingers.

anyway reduced the screw tight, but the screw on the motor is completely pulled off... so i have reconfigurate the X motor position and the motor screw for tight same as the manual

printed the tension meter (TM) for better check. with the TM  the x belt is in above the limit between middle level and max level, boh. i try anyway to use this value.with prusa lcd the tension is 250. ok for me

print another thing and seems all ok.

this night, 1 week after,  i've print another thing, and I see that x axis has problem because on my print there is an X shifting.

retry the X check by the software and the belt is 156! 156!  use the TM  and the belt is always in the same point, between middle and max level.use finghers and seems not so tight, try to reduce the screw tight on x motor and, removing completly the screw, the belt tension with the TM is always at the same point. 

retry the belt check with the software and it tell me that there is a problem on x axis the firts time, 160 the second time, X axis problem the third time.

so, i don't know what can i do. i can't find a good belt tension on X axis.

or the TM doesn't work, or the screw doesn't work.

for me the tension with finger is not enought, for the TM is near the max level, for the prusa firmware is above 150 and i don't understand why this thing continue change.

what can i do?