Digital Spindle For Tnc 426 Without Spindle Dsp; No Changes - HEIDENHAIN TNC 426 PB/M Technical Manual

Table of Contents

6.24.4 Digital Spindle for TNC 426 without Spindle DSP

Temporary input

Adjust the current

Speed controller

Enter the following temporary input values when you begin:

Temporary input

C axis operation must be deselected for commissioning, meaning that no

identical PWM outputs may be entered in MP120.x and in MP121.x.

Same procedure as for digital axes, with one exception:

You must adjust MP2401 instead of MP2400.x.

Define the step function:

In MP3411.x, enter the maximum acceleration and start the step by

switching the spindle on.

Set the following machine parameters:

• MP2501 = 2: Proportional factor of the speed controller

• MP2511 = 1: Integral factor of the speed controller

• MP2521 = 0: Differential factor of the speed controller

• MP2531 = 0: PT

element of the speed controller

Activate a spindle speed from the highest gear range.

With the integrated oscilloscope, record the nominal velocity value

V (NOM RPM), the actual speed value V (ACT RPM), and the nominal

current value (I NOMINAL).

Output a step by activating the spindle-on function (M03/M04).

Choose the height of the step function for a very low speed so as not to

overload the speed controller, i.e. so that I NOMINAL is not limited.

Increase the P factor (MP2501) until the system oscillates or no change is

Output of speed, gear range

Ramp gradient

Multiplier for MP3411.x

Overshoot behavior

Positioning window

HEIDENHAIN Technical Manual TNC 426, TNC 430