Mechanical dampers isn't a option these are single shaft steppers.

I cannot begin of how disgusted I am with this 4 axis kit from China.

1. Originally purchased with a TB6560 board, after some research and valuable information on this forum learned this board wouldn't work well with motors so decided to purchase 4 DM860A Drivers from same company.

2. Once build began I realized shafts were longer than normal 34 nemas and needed to modify for K2 slide and R&P system.

3.Shafts are 14mm not 1/2 so needed new coupling and pulley's with custom boring.

Now all said and done these motors are actually useless since this is happening at speeds that are most commonly used when cutting.

Just wish I took the first $500.00 lost and bought a new kit here in the States.

Thanks for the info aarongough and giving me a opportunity to vent,
Dan