Not so different from my setup with Gecko203V and 465 in-oz steppers (very low 1.6mH inductance, 2 steppers on X and one on Y), 72V analog supply and 15mm pitch screws.
If my machine is set up properly I can run rapids up to 1000ipm (about 1700rpm). But the steppers become really weak at that speed and it takes very little to make them stall. To be reliable I have set the max. jog and rapid speed to 280ipm and mostly machine between 80ipm and 250ipm, depending on the bit.
What I must watch most closely is the pre-load of the angular contact ballscrew bearings. It takes only a tiny amount of over-tightening and the bearing friction makes the stall speed drop seriously. The other is the proper synchronization of both X-steppers. I have them coupled with a timing belt to avoid racking and the pulleys must of course be tightened in a position that the steppers don't work against each other. But that is easy: loosen one pulley, turn the machine off and on again to get thesteppers into the same full step start position, then tighten the pulley set screw.
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