User Manual

PoKeys user manual
37
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Limit and home switch filters
The limit and home switch inputs support digital filtering. The filter value defines the minimum time
for the limit or home switch signal activation (1 unit equals to 100 µs = 0.0001 s) - possible values are
between 0 (no filtering) to 254 (25.4 ms).
PoStep drivers configuration
If PoStep60-256 drivers are connected with PoKeys57CNC device using PoExtension2 bus,
configuration (step mode, temperature limit, motor current settings) of the drivers can be done via
PoKeys57CNC device. Status of the drivers (temperature, voltage, input states, faults) can also be
displayed.
In order to establish connection between PoStep drivers and PoKeys57CNC, configure unique I2C
addresses to each PoStep device using PoStep configuration tool (Figure 12). PoKeys device functions
as a proxy between the PC application and PoStep drivers.
Open PoStep driver configuration dialog using the 'Configure PoStep drivers' button on the Pulse
engine dialog. Select one of the axes and select the I2C address for the driver (the address must be
set to the value equal to what was set in the PoStep configuration tool in previous step).
Figure 9: PoStep driver configuration dialog
The configuration dialog contains the list of PoStep drivers on the top and selected driver
configuration and status at the bottom. In top right, there are buttons to retrieve settings from the
PoStep device and to refresh the settings.
Once the device is configured, the driver mode, step mode, temperature limit and current settings
are made available to the user. PoKeys device automatically configures the PoStep driver according
to the selected values. Numeric selection settings require the user to press the 'Set' button.
Although, the settings are sent to PoStep drivers, they are only valid until the PoStep device is reset -
to save the settings as default startup settings, click on 'Save to EEPROM'.