HEIDENHAIN MANUALplus 620 Technical Manual page 910

Hide thumbs Also See for MANUALplus 620:

It is easier to adjust the MP_compWidth and MP_compTimeOffset

parameters at low feed rates. HEIDENHAIN recommends:

First roughly adjust MP_compStrength.

Then select a low feed rate.

Then set MP_compWidth and MP_compTimeOffset.

Return to the original feed rate and optimize the value for

MP_compStrength.

You use these three parameters (MP_compStrength, MP_compWidth,

MP_compTimeOffset) to adjust the compensation of reversal peaks for a

specific feed rate and radius. Under certain circumstances, however, it can be

necessary to correct the compensation strength based on the feed rate.

Proceed as follows:

Switch to the Oscilloscope mode of operation.

Set the following value in the oscilloscope by pressing the SELECTION soft

Display mode: YT

Sampling time: IPO clock

Channel 1: A nom

Trigger: Free run

Press the OSCI soft key to switch to the curve representation.

Now get the nominal acceleration for the axis (A nom) at the reversal point

for the feed rate that you have selected for the adjustment up to now.

Press the START soft key to start recording.

Press the axis-direction key of each axis.

Press the STOP soft key to stop recording.

Enter the determined acceleration in the parameter MP_compRefAcc.

The oscilloscope shows mm/s

means that you must divide the value by 1000.

Now use the parameter MP_compFFAdjust to correct the compensation

strength for lower or higher feed rates.

, but the unit of the parameter is m/s

HEIDENHAIN Technical Manual MANUALplus 620