
11.TROUBLESHOOTING B-63945EN/02
- 600 -
Pulse coder power voltage is low
(1)
Check whether the motor rotated more than one
rotation (one rotation signal is issued ) at faster than
128 pulses of position error amount.
Return start position is too close
- Change the return start position.
- Move the machine at faster that 128
pulses for more than one rotation to
wards RP.
NO
YES
NO
YES
Rotated ?
Check that voltage of Pulsecoder is higher than 4.75 V.
To measure Pulsecoder voltage, remove the motor cover and measure on
pulse coder PCB at across + and - or +5V and 0V terminals.
More than 4.75V
Hardware failure
- Pulse coder is faulty
Change Pulsecoder or motor
CAUTION
(1) After the Pulsecoder or motor is exchanged,
reference position or machine's standard point may
be different from former one. Please set it correctly.
Reference
A speed more than 128 pulses is required because
if speed is lower that this, one-rotation signal does
not function stably, causing improper position
detection.
If bit 0 of parameter No. 2000 is set to 1, a speed
corresponding to a positional deviation of 1280
pulses or more is required.
Parameter No. 1836 can be set to 128 or less, as
the minimum positional deviation with which
reference position return is possible. (If the
parameter is set to 0, 128 is assumed as the
minimum positional deviation. If bit 0 of parameter
No. 2000 is set to 1, a value equal to ten times the
set value is used for checking.)