Delta RMC101 - Manual (Page 574)

RMC100 and RMCWin User Manual
6-30
inch. At the desired 0 position, the MDT produces 425 counts.
We first calculate the exact Scale:
With the exact Scale value, we must choose the Prescale Divisor and the rounded Scale value.
The highest divisor value we can use is 1; multiplying the scale by 2, 4, or 8 would all overflow the
Scale limits of ±32767. Therefore we have the following parameters:
Scale = 29879
Prescale Divisor = 1
Next, we must calculate the offset:
Example 2
A system has an MDT with a calibration number of 9.0108 ms per inch and 1 recirculation. The
desired position units are tenths of a millimeter. At the desired 0 position, the MDT produces 1122
counts.
We must first calculate the scale, but in order to do that we need to know how many position units
there are in an inch:
So, we now calculate the exact Scale:
With the exact Scale value, we must choose the Prescale Divisor and the rounded Scale value.
The highest divisor value we can use is 4; multiplying the scale by 8 would overflow the Scale
limits of ±32767. Multiplying the exact scale by this divisor value and rounding gives us the
following parameters:
Scale = 30789
Prescale Divisor = 4
Next, we must calculate the offset:
Example 3
A system has an MDT with a calibration number of 8.9772 ms per inch and 8 recirculations. The
desired position units are thousandths of an inch. Therefore, there are a thousand position units
per inch. At the desired 0 position, the MDT produces 28226 counts.