Hi guys, hope you can help me, i got a cnc router form china, is the common heavy duty 1325, the machine was working fine in the past, is a machine the only use sometime and his main funtion is to surface cleaning wood slabs for dinning tables and coffe tables, but in this week is making an issue, it randomly plunge the z axis down, it star moving the z axis down little by little, ruining jobs and the slabs, the issue also happen when the job is finish and the machine goes to zero and the spindle stop, when the spindle is stopping th z axis moves, ill atthaced the link of the video of the issue and the photo of the machine.
Also ill atthached the g code of the surface clenaing job.
I change the pc hopping that resolve the problem but it doesnt, the issue is still there, im not expert and i cant see if the problkem is mechanical, config or something elsehope somebody help me with this issue and thanks for your time guys.
link video:
https://youtube.com/shorts/KL-B00Bh3lI?feature=share