I bought a nema 34 kit of ebay to "upgrade" my machine, not knowing about the problem with high inductance. All i saw was the high torque, thinking it would be a lot better. But after mounting everything and the steppers started stalling at half the speed of my nema 23s, i started researching and found many others with the same problem.
The motors i ordered are 34HS5435C-02B2 from longs motor with 22mH inductance.
I am able to get 1000mm/min with these motors, and i got 1800-2500mm/min with my nema23.
I am running direct drive to 3205 ballscrews (i know they are overkill), upgraded from 1605 at the same time as steppers. I didn't go for 3210 ballscrews because of accuracy loss (have some regrets about this).
I am wondering if going for this kit (1232oz 5.5mH) would give me the same/ hopefully more speed than the nema23s. (Using the DM860A drivers from the old kit at 60v).
From my understanding my current steppers want:
32 * sqrt(inductance) = 32 * sqrt(22) = 32 * 4,69 = 150,08V
And the "new" ones:
32 * sqrt(inductance) = 32 * sqrt(5,5) = 32 * 2,345 = 75,04V
Happy for suggestions aswell.