If you are cutting on the same side of that slot on both cuts. The cut from Left to right is conventional milling. The cut from right to left is climb milling. For you width of cut WOC and depth of cut DOC you are to wide and to deep. Climb milling takes the biggest bite at the start of each rotation of the end mill and the thinnest at the end of the rotation. This is causing your spindle to move away from the tool path at the beginning and the move back to the tool path at the end giving you the scallop you are seeing.
You need to stick to conventional milling or reduce your DOC and WOC on climb milling.
Dave
It’s not always possible to go conventional sometimes, especially when you’re doing pocketing. What you can do if your bit is not capable of cutting on climbing, give your tool path bit size half of the diameter, like you’re using .25" bit, you can put .128", yes, you pocketing time will be twice as more time, but you’re gonna have very clean cut on sides and the bottom.
Off course, don’t forget to shrink your pocket size .128". Because final cut will be that much wider.
Can you not call out your WOC in your CAM and your DOC so that you are not taking those great big bits.
I know I can in the CAM programs is use.
Dave
