Gain setting. Fagor CNC 8055 para otras aplicaciones, CNC 8055 for lathes, CNC 8055 para fresadoras, CNC 8055 for milling machines, CNC 8055 para tornos, CNC 8055 for other applications

Installation manual

7.5.2

Gain setting

The various types of gains must be adjusted for each axis in order to optimize the system's performance for the programmed movements.

An oscilloscope is highly recommended to make this critical adjustment by monitoring the tacho signals. The illustration below shows the optimum shape for this signal (on the left) and the instabilities to be avoided during start-up and braking.

7.

There are three gain types for each axis. They are adjusted by means of axis machine parameters and following the sequence indicated next.

Proportional gain

It defines the velocity command corresponding to a feedrate resulting in 1 mm of following error.

It is defined with a.m.p. PROGAIN (P23).

Feed-forward gain

It sets the percentage of velocity command due to the programmed feedrate.

To use it, acc/dec must be active ACCTIME (P18).

It is defined with a.m.p. FFGAIN (P25).

Derivative gain or AC-forward gain

The "derivative gain" sets the percentage of velocity command applied depending on the fluctuations of following error.

The "AC-forward gain" sets the percentage of velocity command proportional to the feedrate increments (acceleration and deceleration stages).

To use it, acc/dec must be active ACCTIME (P18).

It is defined with a.m.p. DERGAIN (P24) and ACFGAIN (P46).

If ACFGAIN = No

If ACFGAIN = Yes it applies derivative gain it applies AC-forward gain.

CNC 8055

CNC 8055i

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OFT

: V01.6

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