Application Setup CDHD
146 User Manual
Ex a m ple: The m otor runs in a velocity control loop at 6 rpm , and the calibration
procedure is executed.
Figur e 6 - 1 1 .
Procedu re - Sine Encode r Ca libra tion Usin g ServoStudio
ServoStudio does not currently support sine encoder calibrat ion.
6 .6 .5 Sine Encoder an d Resolver Diagnostics
Sine En coder and Re solver Dia gnost ics Over view
When working with a sine encoder or a resolver, the CDHD measures the levels
of the sine and cosine signals, and checks that they are within a cert ain range.
When the signals are out of range, two possible faults can result: r4 and r 8 .
If these faults occur, it is very useful to record the sine and the cosine signals, to
det ermine whether or not they are valid.
Recor ding the Sign als
The sine and the cosine signals can be recorded by recording particular drive-
internal data. A typical RECORD com mand is as follows:
record 1 1000 "@_AX0_s16_Sine.s16 "@_AX0_s16_Cosine.s16
This com mand records 1000 sam ples of the sine and the cosine values, at a
intervals of 31.25 µs (the drive's basic sampling rate).
A typical recording of a sine encoder m ight look as shown in Figure 6- 12.
The recorded dat a is presented in in t e r na l drive units (count s of t he analog-to-
digit al converter) .