Hello. I was made epoxygranite machine about 2 years ago, axes drivers and motors by dmm DYN2. All works great until november 19'. In the middle of work, the z-axis began to shake
you can see it on video
https://youtu.be/cpS7x5pF5Ew
https://youtu.be/YadmjpNHDR4

after few days of conversation with dmm (i redid all mechanics and wirings in this few days) a get answer from dmm - you need new motor
ok, i bout new motor and made encoder calibration (drive was calibratetd for old type of motors with 5 poles new one have 4 )

before calibration

https://youtu.be/BToz-m02Fmc

and after

https://youtu.be/0Dfyx2PCxcg

Ok - back to work after 2 weeks

And 2 days ago new motor just stop in the middle of wokr "lost phase"
ok - restart - amd motor even didn't trying to move
https://youtu.be/XFrf4-rritI
and numbers on mootor monitor
https://youtu.be/9K1pDQeFSgA
ok, i redid all control box - replace all "bad" wires, made new solid ground.
Made encoder calibration - and it works - im glad. Motor work wery good.... untill i power off machine for knight .
I turn it on in the morning and get driver foult "overcurrent' and "overheat"

All this day i had conversation with ddm support and receive wery good decision of my problem
"....Thank you for the video, I can see the problem,



I think the best option is to buy another drive to see if it's the servo drive problem, since the motor is new, it should be no problem...."

Really - i need to buy new motor and new driver every 2 years ? no, Thank you.

So my question is - is enybody had similar problem and whether it was possible to solve it? Thank you and sorry for bad Lang.