Machine Zero Modes Without Home Switch - Parker Compax3 Operating Instructions Manual

Setting up Compax3
Please note:
Please observe:
118

Machine zero modes without home switch

In this chapter you can read about:
Without motor reference point ........................................................................................ 118
With motor reference point............................................................................................. 120
Without motor reference point
MN-M 35: MN (machine zero) at the current position
The current position when the MN run is activated is used as an MN.
Due to encoder noise it is possible that a value <> 0 is set when teaching to 0.
If end limits = 0, an end limit error may occur during homing run.
MN-M 128/129: Stromschwelle while moving to block
Without a MN (machine zero) initiator, an end of travel region (block) is used as
MN (machine zero).
For this the Stromschwelle is evaluated if the drive pushes against the end of the
travel region. When the adjusted current is exceeded, the Homing is set. During the
homing run (MN), the error reaction "following error" is deactivated.
The machine zero offset must be set so that the zero point (reference point) for
positioning lies within the travel range.
MN-M 128: Travel in the positive direction to the end of the travel region
MN-M 129: Travel in the negative direction to the end of the travel region
Caution!
Wrong settings can cause hazard for man and machine.
It is therefore essential to respect the following:
Choose a low machine zero speed.

Set the machine zero acceleration to a high value, so that the drive changes

direction quickly, the value must, however, not be so high that the limit threshold
is already reached by accelerating or decelerating (without mechanical limitation).
The mechanical limitation as well as the load drain must be set so that they can

absorb the resulting kinetic energy.
With a bad feedback signal or high controller gain (fast controller or high inertia or

mass) the machine zero might not be detected.
In this case it is necessary to use the control signal filter (O2100.20) or the
velocity filter (O2100.10).
192-120113 N08 C3I12T11 - December 2010
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C3I12T11