Setting Up
SINUMERIK 801 5-9
Start-Up
4.5 Rotation Monitoring
Rotation monitoring
If the double switch mode is used for reference point approaching, (see
Section 4.3 “Starting Up Reference Points”), monitor the output pulse of the
stepper motors with BERO pulse generated with each rotation of the
leadscrew.
MD Designation Unit Axis
Example
value
Description
31100 BERO_CYCLE IPR
X，Z
1250 Steps for monitoring
rotation
31110 BERO_EDGE_
TOL
I
X，Z
500 Step tolerance for
monitoring rotation
Notes:
The step tolerance of the stepper motors shall include positional difference
between both edges of BERO and follow-up error resulted at the maximum
traversing speed. The interrelations are given as below:
Steps for monitoring rotation = steps per revolution of the step motor/reduction
ratio
Steps corresponding to follow-up error = steps × follow-up error at the max.
speed/pitch of leadscrew
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