Procedure For Optimizing The Machine Parameters; Calculation Of Possible Oscillations In Normal Direction - HEIDENHAIN TNC 426 PB/M Technical Manual

Table of Contents

Procedure for

optimizing the

Calculation of

oscillations in

normal direction

To optimize the Z axis:

Select the range so that the vertical side is scanned.

Procedure for optimizing the machine parameters:

Record ACTL. SPEED with the internal oscilloscope.

In the PROGRAM RUN, FULL SEQUENCE mode, select the OPTIDIGI

program and press the external START key. The machine runs and the

digitizing process begins.

Increase the feed rate with the override potentiometer until the nominal X

value has reached the maximum value and shows only minor voltage dips.

Make a note of the maximum feed rate that is possible in the worst axis.

(Axis should be just able to maintain a constant velocity.)

Are the oscillations in normal direction already perceptible, i.e. does the ball

tip lift off visibly from the workpiece surface?

• If not, then increase MP6230, e.g. by 10 mm/min. Return to the

PROGRAM RUN, FULL SEQUENCE mode, select the OPTIDIGI program

and press the machine START button...

• If so, then reduce MP6230 again, e.g. by 10 mm/min.

Repeat the optimization process for the Y axis. Also, switch the NC to the

scanning direction Y. The optimization process is oriented to the worst axis.

The feed rate must not be increased any further with either the override

potentiometer or the feed rate in normal direction (MP6230).

Repeat the optimization process for the Z axis. Change the scanning range

accordingly. The optimization process is oriented to the worst axis. The feed

rate must not be increased any further with either the override

potentiometer or the feed rate in normal direction (MP6230). Pay particular

attention to the vertical side.

------------------------------------------------- -

MP6210 [1/s]

PP.INT [mm] 60 [s/min]

Enter the calculated value in MP6210.

This standardizes the feed rate override potentiometer to the "attained feed

HEIDENHAIN Technical Manual TNC 426, TNC 430