big peak on 35hz on y axis help :/

Hi, i am tuning my v core 4 400mm and i am stuck with problem that my gantry is shaking like crazy on around 30-35Hz which gives me horrible accelerations . I used real time analyzis to test that frequency and i found the carriage is shaking the most , if thighten the belts then whole gantry is shaking.
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7 Replies
Deska
DeskaOP2mo ago
Meanwhile the x graph looks ok to me . One peak at 65 Hz and gives me 16k acc
RainingRusty
RainingRusty2mo ago
Did you resolve this? My graph looks very much the same
Deska
DeskaOP4w ago
Unfortunately not
ben_ro.
ben_ro.3w ago
could be to much toruqe on the XY - connector screws, the ones hold down by a locknut
JphiLamalice
JphiLamalice4d ago
Have you figure out the issue for the 35Hz peak?
TheFullNelson32
this is odd. I have the exact same issue
JphiLamalice
JphiLamalice2d ago
I have found that my screw on the motion system are skew by around 1mm : M5x45 and M5x85 Cap Head Screws. I have ordered new ones. I will test them next week. I will see if it comes from that issue...

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