NOVA electronics Inc.
MCX514 -
43
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43
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Step 2: Low-speed home search
Drive pulses are output in a specified direction at the speed set in the
home search speed (HV) until the specified detection signal becomes
active. The user can specify either nSTOP1 or limit signal as a
detection signal. If a limit signal is selected, it becomes the limit
signal of a search direction. To perform low-speed search operation,.
set the home search (HV) lower than the initial speed (SV). A
constant speed driving mode is applied and when a specified signal
becomes active, the operation stops instantly
Fig. 2.5-4 Operation of Step 2
Irregular operation
①
A specified signal is already active before Step 2 starts.
[Behavior]
The motor drives the axis in the direction opposite to a specified search
direction at the home search speed (HV) until a specified signal becomes
inactive. When a specified signal becomes inactive, the function executes
Step 2 normal operation from the beginning.
Fig. 2.5-5 Irregular Operation
①
of Step 2
②
When nSTOP1 is specified as a detection signal and
a limit signal in the search direction is active before
Step 2 starts.
[Behavior]
The motor drives the axis in the direction
opposite to a specified search direction at the
drive speed (DV) until nSTOP1 signal becomes
active. When nSTOP1 signal becomes active, the
motor drives in the direction opposite to a
specified search direction at the home search
speed (HV) until nSTOP1 signal becomes
inactive. When nSTOP1 signal becomes inactive, the function executes Step 2 normal operation from the beginning.
Fig. 2.5-6 Irregular Operation
②
of Step 2
③
When nSTOP1 is specified as a detection signal
and a limit signal in the search direction becomes
active during execution.
[Behavior]
Driving stops and the operation described in
Irregular operation
②
is performed.
Fig. 2.5-7 Irregular Operation
③
of Step 2
Specified Search Direction
Normal Operation
Specified Signal
Active
Section
Exit in the
opposite direction
Search in the
specified direction
Specified Signal
Active
Section
Limit signal is detected
nSTOP1
Over Run Limit in the
Search Direction
Active
Section
Active
Section
Search in the
specified direction
Exit in the opposite
direction
Detect
n
STOP1
at high- speed
in the opposite direction
nSTOP1
Over Run Limit in the
Search Direction
Active
Section
Active
Section
Exit in the opposite
direction
Search in the
specified direction
Detect STOP1
at high- speed
in the opposite direction
