I have a Bridgeport J head machine converted to CNC / Mach3 / Stepper motors/ spindle VFD etc.
Up until recently I have used standard HSS slot and end mills, but due to wear, I have been experimenting with Carbide tooling.
Even using brand new carbide cutters (2 and 3 flute) I get a lot of chatter and vibration, for example, cutting a 10mm wide slot 10mm deep in ali, 10mm dia cutter, 50mm/min feed and about 2,500 RPM.
With a HSS cutter its a knife through butter but with the carbide it sounds like the machine is going to shake itself apart.
I tested a cut with the axis locking handles lightly nipped and that did not make any difference
I must be doing something wrong (feed /speed/ RPM), can anyone help?