MID-7604/7602 Power Drive User Guide
12
ni.com
Front Panel DIP Switch Settings
The MID-7604/7602 front panel has a detachable metal plate that when
removed provides access to four 10-position DIP switch banks. Refer to
Figure 1 for the location of these switches.
Use the first nine DIP switches on each 10-position DIP switch bank to
configure the microstep rate, peak output current, and current reduction for
each axis. The DIP switch banks for axes 1 and 2 contain a global DIP
switch, switch 10, which sets the polarity of the inhibit input and the
polarity of the limit status LED, respectively. Figure 3 shows the DIP
switch bank layout.
Figure 3.
DIP Switch Bank Layout
Microstepping Selection
The MID-7604/7602 uses bipolar chopper, two-phase microstepping
drivers with a broad range of microstep rates. The factory default setting
is 10-times microstepping (2,000 steps/rev with standard 1.8º stepper
motors). Table 2 shows the DIP switch settings for all possible microstep
settings. DIP switches 6 through 9 control the microstep rate on a per-axis
basis.
1
Peak Current Output Switches
2
Microstep Rate Switches
3
Current Reduction Switch
4
Global Polarity Switch (unused on
axes 3 and 4 DIP switch banks)
1
2
3
4
5
6
7
8
9 10
O
N
1
2
3
4
