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Getting Started with NI SMD-7620/7621 and NI 73xx
7.
Click the
Stepper Settings
tab on the bottom of the window and set
Stepper steps per
revolution
to 20,000.
Note
The
Stepper steps per revolution
setting
must
match the Steps/Rev setting
in the NI Stepper Configuration Utility.
8.
Click
Motion I/O Settings
and select
Disabled
for the
Forward Limit Switch
,
Reverse
Limit Switch
, and
Home Switch
.
Note
These configuration settings disable limits for initial setup and testing
purposes. National Instruments recommends connecting and enabling limits in your
final application.
9.
Set the limit and home input active state depending on which NI UMI you are using. This
prevents the limit active error from occurring when no limits are connected.
•
UMI-7772/7774—
Active High Polarity
•
UMI-7764—
Active Low Polarity
10. Set
Inhibit Output Settings
to
Active Low Polarity
.
11. (Optional) Click
Encoder Settings
.
a.
In the
Polarities
section confirm that the
Line State
for
A
,
B
, and
Index
is set to
Active High
.
b.
In the
Index Reference Criteria
section confirm that the
Line State
for
A
and
B
is
set to
Inactive
.
c.
Set Encoder counts per revolution to 8,000. This setting is the encoder resolution in
quadrature counts per revolution and corresponds to the encoder lines per revolution
multiplied by four.
12. Click
Initialize
on the toolbar to send the updated settings to the motion controller.
Initializing the motion controller resets it to a known starting state so that it is ready for
commands.