Siemens SINUMERIK 840Di Function Manual page 1475

Basic machine

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Part program

The part program for automatic adjustment of absolute encoders with probe must perform

the points listed below for each axis in the order indicated:

1. Approach the adjustment position of machine axis, which is detected from the probe

2. Calculate and write the reference point offset to machine data:

3. Set the absolute encoder status to "Encoder is adjusted":

Proceed as follows for automatic adjustment with probe:

1. Enable part program start even for non-referenced machine axes:

2. Enter the machine axis position relative to machine zero when probe is switched as the

3. Initiate NC-RESET to transfer the entered machine data values.

4. Start part program.

5. Disable part program start again for non-referenced machine axes:

6. Initiate POWER ON - Reset so that the reference point offset written by the part program

Reference Point Approach (R1)

Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0

The position must be approached several times from the same direction, but at a velocity

which is gradually reduced on each approach, to ensure that the measured value

obtained is as accurate as possible. The measured value is stored in system variable

MD34090 $MA_REFP_MOVE_DIST_CORR = MD34100 $MA_REFP_SET_POS –

MD34210 $MA_ ENC_REFP_STATE = 2

MD20700 $MC_REFP_NC_START_LOCK = 0

reference point value for all relevant machine axes:

MD34100 $MA_REFP_SET_POS = reference point value

MD20700 $MC_REFP_NC_START_LOCK = 1

is permanently active:

MD34090 $MA_REFP_MOVE_DIST_CORR (reference point offset)

2.6 Referencing with absolute value encoders

Detailed Description

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