Siemens Sinumerik 801 Technical Manual page 64

Setting Up
5-2
* 2: single-edge evaluation, for locking the reference point in the rising edge of
the proximity switch; 4: double-edge evaluation, for locking the referece point
in the intermediate point between rising and falling eges.
Notice
Even if the function "record reference point" has been activated, reference
point must be approached again under following circustances, otherwise
collision might be resulted!
1. After system power up with saved data
a） After machine operator selects on the operator panel to "power up with
saved data" (corresponding alarm# 004062).
b） System will be powered up automatically with saved data after it has been
dead for a long period and battery for internal data savings run out of
power. (corresponding alarm# 004065)
2. After system power-off, the actual position of the axis concerned has
been moved out of maintenance or other reasons.
Parameterization for stepper motors:
MD Designation
31020 ENC_RESOL
31400 STEP_RESOL
Mechanical parameters for the driving system:
MD Designation
31030 LEADSCREW_
PITCH
31050 DRIVE_AX_RATIO
_DENUM[0 ... 5]
31060 DRIVE_AX_RATIO
_NUMERA[0 ... 5]
Note:
After determining the mechanical parameters, set the axis speed. For
stepper motors, the motor speed shall be determined according to its
frequency-torque characteristics: motor speed ＝ axis speed/leadscrew
pitch/reduction ratio.
Input
Unit Axis
value
IPR X, Z 1000
IPR X, Z 1000
Input
Unit Axis
value
mm X, Z
- X, Z
- X, Z
Description
Encoder
markings per
revolution
(encoder no.)
Steps per
stepping motor
revolution
Description
Pitch of
5
leadscrew
Denominator
40
load gearbox
(control
parameter No.)
Numerator load
50
gearbox (control
parameter set
No.)
SINUMERIK 801
Start-Up