Need help with X screw whipping

[Atechy]

Hi All,

I own a Chinese 48x96 CNC router. It works very well except when it goes into fast traverse the X screw starts to whip and the machine shakes violently. The screw runs down the center of the machine and is about 100 inches long and about 3/4" diameter. I've tried several fixes but none have worked thus far. Any suggestions will be greatly appreciated.


Thanks
Atechy

[Eurisko]

Do a search for "rotating ballnut" here on the Zone.

The basic idea is that the leadscrew is fixed (can't turn), and the ballnut is belt-driven by a motor, moving the axis.

A larger diameter screw would also help, but the cost would be prohibitive.

However, many routers in your size range opt for rack and pinion drive.

Owning a large beast of a router would be great, but I'm still learning router physics the hard way, on a much smaller scale

[Atechy]

Thanks Eurisko,

I've been doing hobby CNC for quit a while and I've never heard of the "rotating ball nut". I will definitely look into this. Thanks for your input.