Siemens SINUMERIK 840Di Function Manual page 1473
Basic machine
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Also See for SINUMERIK 840Di:
- Diagnostic manual (880 pages) ,
- Manual (552 pages) ,
- System overview (55 pages)
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Sequence
Proceed as follows when for adjustment by entering the reference point value:
1. Set the referencing mode to "Assume the reference point value":
2. Move the machine axis in JOG mode to the position to be measured (e.g., with a laser
3. Communicate the position of the machine axis relative to machine zero to the NC as the
4. Enable encoder adjustment:
5. Initiate NC-RESET to transfer the entered machine data values.
6. Switch to JOG-REF mode.
7. Operate the travel key used for referencing in step 2. The machine axis does not move
8. Initiate POWER ON reset.
Reference Point Approach (R1)
Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0
MD34200 $MA_ENC_REFP_MODE = 0
inferometer) or to a known position (e.g., fixed stop).
Note
The machine axis can only be traversed in the direction enabled for referencing with the
travel keys:
MD34010 $MA_REFP_CAM_DIR_IS_MINUS (approach reference point in minus
direction)
To avoid an invalid position because of backlash in the drive train, the known position
must be approached at low velocity.
reference point value:
MD34100 $MA_REFP_SET_POS =
MD34210 $MA_ENC_REFP_STATE = 1
when the traversing key is actuated!
The NC then calculates the reference point offset from the reference point value signaled
by the absolute encoder and the entered reference point value, enters this reference
point offset in machine data element:
MD34090 $MA_REFP_MOVE_DIST_CORR (reference point offset)
and sets the status of the absolute encoder to "Encoder is adjusted":
MD34210 $MA_ ENC_REFP_STATE = 2
The actual value system of the machine axis is synchronized.
The machine axis is now referenced.
To identify this, the NC sets the appropriate interface signal based on which measuring
system is currently active:
DB31, ... DBB60.4/60.5 (referenced/synchronized 1/2) = 1
2.6 Referencing with absolute value encoders
Position
Detailed Description
2-33
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