Hi, i´m testing my mill (bf20 vario) with servos of 40V with the current limit set to 2.5A, the encoders have 90 lines, the controller is the old uhu board and i didn´t modificate the inicial PID parameters. After finding errors in some mechanized pieces i began to investigate where is the problem and i discovered the next thing:
-When the motor works without load it works perfect there is no position error and it works smoothly, the problems appear when the motor works under load because it works not smoothly at low speeds and always has position error (at low and at high speeds), in the board doesn´t appear the signal error.
I don´t know where is the problem? any suggestion?