16
Motor waiting time
A discharge and a suction process are repeated in turn during operation, changing the rotational direction of
the motor. A motor waiting time until a shift of a rotational direction needs to be programmed before operation.
See the formula below for detail.
T >= t/2
T: Waiting time
t : Discharge time or suction time, whichever is longer.
NOTE
•
The motor may step out if the waiting time is too short. "Step out" means the motor rotates out of a specified step angle
and number of pulses.
•
The maximum discharge speed is 4ml/sec, however, hydraulic fluid pressure may rise sharply depending on liquid vis-
cosity and piping conditions, and may overload the bellows. Do not set a discharge speed too fast.
•
Suction pressure may be too low (negative) and trigger cavitation depending on operating conditions such as liquid vis-
cosity, piping layouts and suction speed (max. 3ml/sec). Adjust the suction speed as necessary.
Pump operation
Filter flushing
Check that filter has been flushed in user's system
.
NOTE
See manufacturer's manual for filter flushing.
Degassing
Eliminate air from the filter cartridge before operation. Air in a filter or a pipeline reduces a flow rate.
Open a suction and a discharge line fully.
NOTE
Do not close a valve on a suction line or a discharge line during operation. It may pose a leak or blow
out the pump or a pipe.
Operation
Start operation along with a program.
Pump operation
2
1
3
4
