Setting The Software Limit Value - YASKAWA YRC1000 Operator's Manual

1.4.4 Setting the Software Limit Value

1 Spot Welding Application Using a Motor Gun
1.4 System Setting (Motor Gun)
For the motor guns, the position where the new tip contacts each other is
set as the zero-point (pulse = 0), and the pulse software limit is set at
further pressing position from the zero-point.
It is because the gun needs to be closed more than the zero-point when
the tips become worn.
<Setting Example>
The contact position of Since the softlimit is set as
the new tip is set as the zero-point, the tips do not
the zero-point. reach the contact position
when the tips become worn.
Parameters
S1CxG800: Pulse software limit (+ side)
S1CxG810: Pulse software limit (- side)
<Example>
When S1CxG800=50000 and S1CxG810=0:
The motor gun moves in the range from 0 to 50,000 pulses.
To move the tip to the contact position when the tips become worn,
set -3,000 for S1CxG810 so that the motor gun moves in the range
from -3,000 to 50,000 pulses.
When setting the value for S1CxG810, consider the pulse amount
equivalent to the total of maximum wear amounts of both tips and the gun
arm bend when maximum gun pressure is applied.
1-43
When the softlimit is set
at further pressing position
from the zero-point, the tips
reach the contact position.
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