Checking Polarity Of Nominal Voltage; Optimizing; Proportional Component Mp1940.X; Integral Component Mp1920.X - HEIDENHAIN TNC 415 Technical Manual

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Axis sequence when approaching

reference marks

Select axes with digital speed controller

Monitor speed controller

Integral component for speed controller

Proportional component for speed

Polarity for torque signal

Select encoder for position control

Motion monitor for position and speed

Delayed shutdown of position controller

Checking polarity of nominal voltage

Cancel override and start axes with direction keys for a short period. Watch drive response, modify

polarity while turning.

The monitor via MP1910 is in effect (error message: "GROSS POSITIONING ERROR 3F "

if polarity is wrong).

The following curves should be displayed in the oscilloscope for each axis:

Nominal speed (

Actual speed (

Output analogue voltage (mV): V

A step function is output for optimizing (see "Oscilloscope", later in this chapter). The feed rate must

be selected such that the analogue voltage is < 8 V. It is now only necessary to press the

appropriate axis direction keys to output a step function to the servo amplifier.

MP1940.x is increased until the step response (actual speed) shows large control fluctuations. This

value is then halved to reduce overshoot to virtually nil.

MP1920.x is then increased until large control fluctuations again occur for the actual speed. Half

this value is then entered in MP1920.x. The resulting overshoot should not exceed 40%.

TNC 407/TNC 415/TNC 425

3 Machine interfacing

Provisional input value

0 => inactive

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Tnc 425e Tnc 415f Tnc 407 Tnc 415b Tnc 425