If you doing upgrade from 3 or 2 DOF pls review https://dofreality.com/instructionsUHP6.pdf
1 . Step by step assembly instructions:
Never ever leave platform powered unattended and powered on when not used. Motors
are constantly doing micro adjustments. When overheated over 70C they can loose the
power.
Attach motors to the hex base with M8х75 (6 pcs.)
Make sure all motors are attached according to the labeled by numbers, and the black motor
arms are facing the motor itself as shown below in the hexagon: