YASKAWA SGDV-OFB03A Product Manual page 82

SERVOPACK Set-up
Polarity Detection Functionality
Linear Motor
Requirements that Enable
the Function
Execution of the Function
with Analog Voltage and
Pulse Train Model
82
– The rotary motor is turned ON during the function. Take measures to
avoid electric shock.
– The rotary motor will make large movements during detection. Take
the machine's range of motion into consideration and do not stand
near any moving parts.
– The function depends on many factors such as inertia ratio and fric-
tion. If any error occurs because of one of these factors the function
may fail.
When using a linear motor without a polarity sensor, polarity detection must be executed.
Make sure the following conditions are satisfied when executing the function.
1. There is no danger when the linear motor moves approximately 10 mm. In case the
function fails, the linear motor may move approximately 50 mm.
2. The encoder period is within 100 μm. (Within 40 μm is recommended when using
an incremental encoder.)
3. Minimum unequal external force on the linear motor (5% of the rated force max-
imum is recommended).
4. The mass ratio is within 50 times.
5. On a horizontal axis.
6. Friction on the guide is a few percentages of the rated force (air slide not used).
– The linear motor is turned ON during the function. Take measures to
avoid electric shock.
– The linear motor will make large movements during detection. Take
the machine's range of motion into consideration and do not stand
near any moving parts.
– The function depends on many factors such as cable tension, mass
ratio and friction. If any error occurs because of one of these factors
the function may fail.
The function is enabled by the following settings:
1. The parameter Polarity Sensor Selection Pn080.0 is set to disable polarity sensor
Pn080.0 = 1.
2. The main power is supplied.
3. No alarms occur.
4. Hard wire base block is not active.
5. The parameter Writing Prohibited Setting Fn010 is not set to prohibit writing.
6. The SEN signal is turned ON in case of an absolute encoder.
Input Signal Through CN1 connector
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Sigma-5 and Sigma-7 Series SERVOPACKs