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Ndrive HP Options
Ndrive HP 10/20/30 User’s Manual
4-28 www.aerotech.com
For this to function, you MUST have the proper jumper set
to 2-3 for this channel and the bit in the CfgFbkRDConfig
axis parameter set to 1. Otherwise, erratic results may
occur.
Adjusting the gain of the R/D converter
Once the phase is adjusted for optimum conversion for inductosyns, adjust the
CfgFbkRDGain axis parameter until you see the analog signals peaking between
approximately 5,000 (on the low end) and 60,500 (on the high end) counts. This axis
parameter can be adjusted via the Ndebug.exe utility. These numbers equate to
approximately 0.38 to 4.62 volts on a zero- to 5-volt scale, or ± 8.48 volts on a ± 10V
scale (i.e. via the Nstat.exe utility), depending upon where you measure the signals. This
nominally provides 2V RMS (2.83 volts peak) to the converter chip on the RDP option
board, which is required for optimum operation. See Figure 4-24 below, for an example
of an optimum circle.
Figure 4-24.
Optimized Resolver Feedback Configuration
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