scalloping on Y axis

[mixer911]

I have been getting a lot of scalloping on all my pieces on the Y axis. I know it's not a feed rate or spindle speed issue because my x axis is exactly how i want it. I have greased all the bearings and always keep the racks very clean.

Any ideas on how to eliminate this? I can feel a slight jerking on y travel.

Here are a couple pics.

Y axis
https://drive.google.com/file/d/0B58...ew?usp=sharing

X axis
https://drive.google.com/file/d/0B58...ew?usp=sharing

[Gary Campbell]

Mixer...
What model of machine do you own?

Were the pics you posted in the X and Y axis cuts made in the X and Y direction? If so, then you cuts made in the Y direction are showing backlash in the X axis. Tighten belts, check grubscrews, etc. Numerous posts here with how to's.

[mixer911]

Gary,

It's a Stinger 4 48

Yes they are shown in the x y directions. So looks like backlash in the X direction.

Ok let me research.